1 1319 121 HEART RATE VARIABILITY, FLOW, MOOD AND MENTAL STRESS DURING YOGA PRACTICES IN YOGA PRACTITIONERS, NON-YOGA PRACTITIONERS AND PEOPLE WITH METABOLIC SYNDROME. HEART RATE VARIABILITY (HRV) AND RESPIRATORY SINUS ARRHYTHMIA ARE DIRECTLY ASSOCIATED WITH AUTONOMIC FLEXIBILITY, SELF-REGULATION AND WELL-BEING, AND INVERSELY ASSOCIATED WITH PHYSIOLOGICAL STRESS, PSYCHOLOGICAL STRESS AND PATHOLOGY. YOGA ENHANCES AUTONOMIC ACTIVITY, MITIGATES STRESS AND BENEFITS STRESS-RELATED CLINICAL CONDITIONS, YET THE RELATIONSHIP BETWEEN AUTONOMIC ACTIVITY AND PSYCHOPHYSIOLOGICAL RESPONSES DURING YOGA PRACTICES AND STRESSFUL STIMULI HAS NOT BEEN WIDELY EXPLORED. THIS EXPERIMENTAL STUDY EXPLORED THE RELATIONSHIP BETWEEN HRV, MOOD STATES AND FLOW EXPERIENCES IN REGULAR YOGA PRACTITIONERS (YP), NON-YOGA PRACTITIONERS (NY) AND PEOPLE WITH METABOLIC SYNDROME (METS), DURING MENTAL ARITHMETIC STRESS TEST (MAST) AND VARIOUS YOGA PRACTICES. THE STUDY FOUND THAT THE MAST PLACED A CARDIO-AUTONOMIC BURDEN IN ALL PARTICIPANTS WITH THE YP GROUP SHOWING THE GREATEST REACTIVITY AND THE MOST RAPID RECOVERY, WHILE THE METS GROUP HAD SIGNIFICANTLY BLUNTED RECOVERY. THE YP GROUP ALSO REPORTED A HEIGHTENED EXPERIENCE OF FLOW AND POSITIVE MOOD STATES COMPARED TO NY AND METS GROUPS AS WELL AS HAVING A HIGHER VAGAL TONE DURING ALL RESTING CONDITIONS. THESE RESULTS SUGGEST YOGA PRACTITIONERS HAVE A GREATER HOMEOSTATIC CAPACITY AND AUTONOMIC, METABOLIC AND PHYSIOLOGICAL RESILIENCE. FURTHER STUDIES ARE NOW NEEDED TO DETERMINE IF REGULAR YOGA PRACTICE MAY IMPROVE AUTONOMIC FLEXIBILITY IN NON-YOGA PRACTITIONERS AND METABOLIC SYNDROME PATIENTS. CLINICAL TRIAL NO 'ACTRN 2614001075673'.	2016	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
2  311  55 AN EXPLORATIVE STUDY OF METABOLIC RESPONSES TO MENTAL STRESS AND YOGA PRACTICES IN YOGA PRACTITIONERS, NON-YOGA PRACTITIONERS AND INDIVIDUALS WITH METABOLIC SYNDROME. BACKGROUND: STRESS PLACES A METABOLIC BURDEN ON HOMEOSTASIS AND IS LINKED TO HEIGHTENED SYMPATHETIC ACTIVITY, INCREASED ENERGY EXPENDITURE AND PATHOLOGY. THE YOGIC STATE IS A HYPOMETABOLIC STATE THAT CORRESPONDS WITH MIND-BODY COHERENCE AND REDUCED STRESS. THIS STUDY AIMED TO INVESTIGATE METABOLIC RESPONSES TO STRESS AND DIFFERENT YOGA PRACTICES IN REGULAR YOGA PRACTITIONERS (YP), NON-YOGA PRACTITIONERS (NY) AND METABOLIC SYNDROME PATIENTS (MS). METHODS: YP (N = 16), NY (N = 15) AND MS (N = 15) SUBJECTS UNDERWENT AN EXPERIMENTAL PROTOCOL THAT COMPRISED OF DIFFERENT 5-MINUTE INTERVENTIONS INCLUDING MENTAL ARITHMETIC STRESS TEST (MAST), ALTERNATE NOSTRIL BREATHING (ANB), KAPABHATI BREATHING (KB) AND MEDITATION (MED) INTERSPERSED WITH 5 MINUTES OF QUIET RESTING (NEUTRAL CONDITION (NC)). DURING THE INTERVENTION PERIODS CONTINUOUS BODY WEIGHT ADJUSTED OXYGEN CONSUMPTION (VO2ML/MIN/KG) WAS MEASURED USING OPEN CIRCUIT INDIRECT CALORIMETRY WITH A CANOPY HOOD. RESULTS: THIS IS THE FIRST STUDY TO REPORT OXYGEN CONSUMPTION (OC) IN YOGA PRACTITIONERS DURING AND AFTER MAST AND THE FIRST TO REPORT BOTH WITHIN AND BETWEEN DIFFERENT POPULATIONS. THE RESULTS WERE ANALYSED WITH SPSS 16 USING 3X9 MIXED FACTORIAL ANOVAS. THE SINGLE BETWEEN-SUBJECT FACTOR WAS GROUP (YP, NY AND MS), THE SINGLE WITHIN-SUBJECT FACTOR WAS MADE UP OF THE NINE INTERVENTION PHASES (NC1, MAST, NC2, ANB, NC3, KB, NC4, MED, NC5). THE RESULTS DEMONSTRATED THAT THE REGULAR YP GROUP HAD SIGNIFICANTLY LESS OC AND GREATER VARIABILITY IN THEIR OC ACROSS ALL PHASES COMPARED TO THE MS GROUP (P = .003) AND NY GROUP (P = .01). ALL GROUPS SIGNIFICANTLY RAISED THEIR OC DURING THE MENTAL ARITHMETIC STRESS, HOWEVER THE MS GROUP HAD A SIGNIFICANTLY BLUNTED POST-STRESS RECOVERY WHEREAS THE YP GROUP RAPIDLY RECOVERED BACK TO BASELINE LEVELS WITH POST STRESS RECOVERY BEING GREATER THAN EITHER THE NY GROUP OR MS GROUP. CONCLUSIONS: YOGA PRACTITIONERS HAVE GREATER METABOLIC VARIABILITY COMPARED TO NON-YOGA PRACTITIONERS AND METABOLIC SYNDROME PATIENTS WITH REDUCED OXYGEN REQUIREMENTS DURING RESTING CONDITIONS AND MORE RAPID POST-STRESS RECOVERY. OC IN METABOLIC SYNDROME PATIENTS DISPLAYS SIGNIFICANTLY BLUNTED POST-STRESS RECOVERY DEMONSTRATING REDUCED METABOLIC RESILIENCE. OUR RESULTS SUPPORT THE FINDINGS OF PREVIOUS RANDOMISED TRIALS THAT SUGGEST REGULAR YOGA PRACTICE MAY MITIGATE AGAINST THE EFFECTS OF METABOLIC SYNDROME. CLINICAL TRIAL NUMBER: ACTRN12614001075673; DATE OF REGISTRATION: 07/10/2014.	2014	

3  817  24 EFFECT OF YOGA ON COGNITIVE ABILITIES IN SCHOOLCHILDREN FROM A SOCIOECONOMICALLY DISADVANTAGED BACKGROUND: A RANDOMIZED CONTROLLED STUDY. OBJECTIVE: THE OBJECTIVE OF THIS STUDY WAS TO ASSESS THE EFFECT OF YOGA, COMPARED TO PHYSICAL ACTIVITY ON THE COGNITIVE PERFORMANCE IN 7-9 YEAR-OLD SCHOOLCHILDREN FROM A SOCIOECONOMIC DISADVANTAGED BACKGROUND. DESIGN: TWO HUNDRED (200) SCHOOLCHILDREN FROM BANGALORE, INDIA, AFTER BASELINE ASSESSMENT OF COGNITIVE FUNCTIONING WERE RANDOMLY ALLOCATED TO EITHER A YOGA OR A PHYSICAL-ACTIVITY GROUP. COGNITIVE FUNCTIONS (ATTENTION AND CONCENTRATION, VISUO-SPATIAL ABILITIES, VERBAL ABILITY, AND ABSTRACT THINKING) WERE ASSESSED USING AN INDIAN ADAPTATION OF THE WECHSLER INTELLIGENCE SCALE FOR CHILDREN AT BASELINE, AFTER 3 MONTHS OF INTERVENTION, AND LATER AT A 3-MONTH FOLLOW-UP. RESULTS: OF THE 200 SUBJECTS, 193 WERE ASSESSED AT 3 MONTHS AFTER THE STUDY, AND THEN 180 WERE ASSESSED AT THE 3-MONTH FOLLOW-UP. THERE WERE NO SIGNIFICANT DIFFERENCES IN COGNITIVE PERFORMANCE BETWEEN THE TWO STUDY GROUPS (YOGA VERSUS PHYSICAL ACTIVITY) AT POSTINTERVENTION, AFTER CONTROLLING FOR GRADE LEVELS. IMPROVEMENT IN THE MEAN SCORES OF COGNITIVE TESTS FOLLOWING INTERVENTION VARIED FROM 0.5 (ARITHMETIC) TO 1.4 (CODING) FOR THE YOGA GROUP AND 0.7 (ARITHMETIC) TO 1.6 (VOCABULARY) IN THE PHYSICAL-ACTIVITY GROUP. CONCLUSIONS: YOGA WAS AS EFFECTIVE AS PHYSICAL ACTIVITY IN IMPROVING COGNITIVE PERFORMANCE IN 7-9 YEAR OLD SCHOOLCHILDREN. FURTHER STUDIES ARE NEEDED TO EXAMINE THE DOSE-RESPONSE RELATIONSHIP BETWEEN YOGA AND COGNITIVE PERFORMANCE.	2012	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    
4  182  29 A RANDOMIZED CONTROLLED TRIAL ON THE EFFECTS OF YOGA ON STRESS REACTIVITY IN 6TH GRADE STUDENTS. THERE IS AN INCREASING INTEREST IN DEVELOPING SCHOOL PROGRAMS THAT IMPROVE THE ABILITY OF CHILDREN TO COPE WITH PSYCHOSOCIAL STRESS. YOGA MAY BE AN APPROPRIATE INTERVENTION AS IT HAS DEMONSTRATED IMPROVEMENTS IN THE ABILITY OF CHILDREN TO MANAGE PSYCHOSOCIAL STRESS. YOGA IS THOUGHT TO IMPROVE THE CONTROL OF REACTIVITY TO STRESS VIA THE REGULATION OF THE AUTONOMIC NERVOUS SYSTEM. THE CURRENT STUDY EXAMINED THE EFFECTS OF YOGA COMPARED TO A PHYSICAL EDUCATION CLASS ON PHYSIOLOGICAL RESPONSE (BLOOD PRESSURE (BP) AND HEART RATE (HR)) TO BEHAVIORAL STRESSOR TASKS (MENTAL ARITHMETIC AND MIRROR TRACING TASKS). DATA ANALYSIS OF BP AND HR WAS PERFORMED USING A 2 X 2 X 4 REPEATED MEASURES ANOVA (TIME X GROUP X STRESSOR TIME POINTS). 30 (17 MALE) 6TH GRADERS PARTICIPATED IN THE STUDY. YOGA DID NOT PROVIDE SIGNIFICANT DIFFERENCES IN STRESS REACTIVITY COMPARED TO A PHYSICAL EDUCATION CLASS (GROUP X TIME: SYSTOLIC (F(1,28) = .538, P = .470); DIASTOLIC (F(1,28) = .1.061, P = .312); HR (F(1,28) = .401, P = .532)). THE LACK OF SIGNIFICANT DIFFERENCES MAY BE DUE TO THE YOGA INTERVENTION FAILING TO FOCUS ON STRESS MANAGEMENT AND/OR THE STRESSOR TASKS NOT ADEQUATELY CAPTURING ATTENUATION OF STRESSOR RESPONSE.	2013	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           
5 1578  34 MEASUREMENT OF THE EFFECT OF ISHA YOGA ON CARDIAC AUTONOMIC NERVOUS SYSTEM USING SHORT-TERM HEART RATE VARIABILITY. BACKGROUND: BENEFICIAL EFFECTS OF YOGA HAVE BEEN POSTULATED TO BE DUE TO MODULATION OF THE AUTONOMIC NERVOUS SYSTEM. OBJECTIVE: TO ASSESS THE EFFECT OF ISHA YOGA PRACTICES ON CARDIOVASCULAR AUTONOMIC NERVOUS SYSTEM THROUGH SHORT-TERM HEART RATE VARIABILITY (HRV). DESIGN OF THE STUDY: SHORT-TERM HRV OF LONG-TERM REGULAR HEALTHY 14 (12 MALES AND 2 FEMALES) ISHA YOGA PRACTITIONERS WAS COMPARED WITH THAT OF AGE- AND GENDER-MATCHED 14 (12 MALES AND 2 FEMALES) NON-YOGA PRACTITIONERS. METHODS AND MATERIALS: ECG LEAD II AND RESPIRATORY MOVEMENTS WERE RECORDED IN BOTH GROUPS USING POLYRITE DURING SUPINE REST FOR 5 MIN AND CONTROLLED DEEP BREATHING FOR 1 MINUTE. FREQUENCY DOMAIN ANALYSIS [RR INTERVAL IS THE MEAN OF DISTANCE BETWEEN SUBSEQUENT R WAVE PEAKS IN ECG], LOW FREQUENCY (LF) POWER, HIGH FREQUENCY (HF) POWER, LF NORMALIZED UNITS (NU), HF NU, LF/HF RATIO] AND TIME DOMAIN ANALYSIS [STANDARD DEVIATION OF NORMAL TO NORMAL INTERVAL (SDNN), SQUARE OF MEAN SQUARED DIFFERENCE OF SUCCESSIVE NORMAL TO NORMAL INTERVALS (RMSSD), NORMAL TO NORMAL INTERVALS WHICH ARE DIFFERING BY 50 MS (NN50), AND PERCENTAGE OF NN50 (PNN50)] OF HRV VARIABLES WERE ANALYZED FOR SUPINE REST. TIME DOMAIN ANALYSIS WAS RECORDED FOR DEEP BREATHING. RESULTS: RESULTS SHOWED STATISTICALLY SIGNIFICANT DIFFERENCES BETWEEN ISHA YOGA PRACTITIONERS AND CONTROLS IN BOTH FREQUENCY AND TIME DOMAIN ANALYSES OF HRV INDICES, WITH NO DIFFERENCE IN RESTING HEART RATE BETWEEN THE GROUPS. CONCLUSIONS: PRACTITIONERS OF ISHA YOGA SHOWED WELL-BALANCED BENEFICIAL ACTIVITY OF VAGAL EFFERENTS, AN OVERALL INCREASED HRV, AND SYMPATHOVAGAL BALANCE, COMPARED TO NON-YOGA PRACTITIONERS DURING SUPINE REST AND DEEP BREATHING.	2012	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              
6  297  26 ALTERNATE NOSTRIL BREATHING AT DIFFERENT RATES AND ITS INFLUENCE ON HEART RATE VARIABILITY IN NON PRACTITIONERS OF YOGA. INTRODUCTION: HEART RATE VARIABILITY IS A MEASURE OF MODULATION IN AUTONOMIC INPUT TO THE HEART AND IS ONE OF THE MARKERS OF AUTONOMIC FUNCTIONS. THOUGH THERE ARE MANY STUDIES ON THE LONG TERM INFLUENCE OF BREATHING ON HRV (HEART RATE VARIABILITY) THERE ARE ONLY A FEW STUDIES ON THE IMMEDIATE EFFECT OF BREATHING ESPECIALLY ALTERNATE NOSTRIL BREATHING ON HRV. THIS STUDY FOCUSES ON THE IMMEDIATE EFFECTS OF ALTERNATE NOSTRIL BREATHING AND THE INFLUENCE OF DIFFERENT BREATHING RATES ON HRV. MATERIALS AND METHODS: THE STUDY WAS DONE ON 25 SUBJECTS IN THE AGE GROUP OF 17-35 YEARS. ECG AND RESPIRATION WERE RECORDED BEFORE INTERVENTION AND IMMEDIATELY AFTER THE SUBJECTS WERE ASKED TO PERFORM ALTERNATE NOSTRIL BREATHING FOR FIVE MINUTES. RESULTS: LOW FREQUENCY (LF) WHICH IS A MARKER OF SYMPATHETIC ACTIVITY INCREASED, HIGH FREQUENCY (HF) WHICH IS A MARKER OF PARASYMPATHETIC ACTIVITY DECREASED AND THEIR RATIO LF/HF WHICH IS A MARKER OF SYMPATHO/VAGAL BALANCE INCREASED IMMEDIATELY AFTER 6 AND 12 MINUTES IN COMPARISON TO BASELINE VALUES WHEREAS THERE WAS NO SIGNIFICANT DIFFERENCE IN THE MEANS OF THESE COMPONENTS WHEN BOTH 6 AND 12 MINUTES WERE COMPARED. CONCLUSION: IMMEDIATE EFFECTS OF ALTERNATE NOSTRIL BREATHING ON HRV IN NON PRACTITIONERS OF YOGIC BREATHING ARE VERY DIFFERENT FROM THE LONG TERM INFLUENCE OF YOGIC BREATHING ON HRV WHICH SHOW A PREDOMINANT PARASYMPATHETIC INFLUENCE ON THE HEART.	2016	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               
7  350  38 ASSESSMENT OF CARDIAC AUTONOMIC TONE FOLLOWING LONG SUDARSHAN KRIYA YOGA IN ART OF LIVING PRACTITIONERS. OBJECTIVE: THE BREATHING PROCESSES ARE KNOWN TO MODULATE CARDIAC AUTONOMIC TONE AND IMPROVE PSYCHOLOGICAL STATUS. WE INVESTIGATED CARDIAC AUTONOMIC TONE FOLLOWING LONG SUDARSHAN KRIYA YOGA (SKY) USING HEART RATE VARIABILITY (HRV) AND SKIN CONDUCTANCE LEVEL (SCL). METHODS: THIRTY HEALTHY VOLUNTEERS (AGE 28.3 +/- 8.4 YEARS; 23 M: 7 F) PARTICIPATED IN THE STUDY. ELECTROCARDIOGRAM (ECG) AND SCL WERE RECORDED FOR 5 MIN EACH, BEFORE AND AFTER LONG SKY. LONG SKY IS A COMBINATION OF PRANAYAMA AND CYCLIC RHYTHMIC BREATHING AND IS PERFORMED BY FOLLOWING THE GUIDED AUDIO INSTRUCTIONS. HRV ANALYSIS WAS USED FOR THE ASSESSMENT OF CARDIAC AUTONOMIC TONE. TIME AND FREQUENCY DOMAIN PARAMETERS OF HRV WERE CALCULATED BY USING RR INTERVAL OF ECG. SCL WAS ACQUIRED USING GALVANIC SKIN RESPONSE (GSR) AMPLIFIER OF POWERLAB IN MICROSEIMENS (MUS). RESULTS: TIME DOMAIN PARAMETERS OF HRV, INCLUDING MEAN RR INTERVAL (P = 0.000), RESPIRATORY SINUS ARRHYTHMIA (RSA) (P = 0.037), STANDARD DEVIATION OF ALL NN INTERVALS (SDNN) (P = 0.013), NN50 COUNT DIVIDED BY THE TOTAL NUMBER OF ALL NN INTERVALS (PNN50) (P = 0.004), AND SQUARE ROOT OF THE MEAN OF THE SUM OF THE SQUARES OF DIFFERENCES BETWEEN ADJACENT NN INTERVALS (RMSSD) (P = 0.002) INCREASED, AND MEAN HEART RATE DECREASED (P = 0.000) FOLLOWING LONG SKY. IN FREQUENCY DOMAIN ANALYSIS, POWER OF LOW-FREQUENCY (LF) COMPONENT (P = 0.010) AND LF/HF RATIO (P = 0.008) DECREASED SIGNIFICANTLY, WHEREAS POWER OF HIGH FREQUENCY (HF) SIGNIFICANTLY INCREASED (P = 0.010). SCL DECREASED FOLLOWING LONG SKY, ALTHOUGH IT DID NOT ATTAIN STATISTICAL SIGNIFICANCE. CONCLUSIONS: THE RESULTS SUGGEST THAT LONG SKY INDUCES SIGNIFICANT OSCILLATIONS IN CARDIAC AUTONOMIC TONE. PARASYMPATHETIC ACTIVITY INCREASES AND SYMPATHETIC ACTIVITY DECREASES AND SYMPATHOVAGAL BALANCE IMPROVES FOLLOWING LONG SKY. DECREASE IN SYMPATHETIC ACTIVITY IS ALSO DEMONSTRATED BY DECREASE IN CONDUCTANCE ALTHOUGH IT DID NOT REACH STATISTICAL SIGNIFICANCE. FROM THIS STUDY IT CAN BE CONCLUDED THAT LONG SKY HAS A BENEFICIAL EFFECT ON CARDIAC AUTONOMIC TONE, AND PSYCHOPHYSIOLOGICAL RELAXATION. IT MAY SERVE AS A TOOL TO IMPROVE HRV, WHICH IS THE MARKER OF CARDIOVASCULAR HEALTH.	2017	
                                                                                                                                                                                                                                                                                                                                                                             
8  448  35 CHANGES IN AUTONOMIC VARIABLES FOLLOWING TWO MEDITATIVE STATES DESCRIBED IN YOGA TEXTS. OBJECTIVES: IN ANCIENT YOGA TEXTS THERE ARE TWO MEDITATIVE STATES DESCRIBED. ONE IS DHARANA, WHICH REQUIRES FOCUSING, THE SECOND IS DHYANA, DURING WHICH THERE IS NO FOCUSING, BUT AN EXPANSIVE MENTAL STATE IS REACHED. WHILE AN EARLIER STUDY DID SHOW IMPROVED PERFORMANCE IN AN ATTENTION TASK AFTER DHARANA, THE AUTONOMIC CHANGES DURING THESE TWO STATES HAVE NOT BEEN STUDIED. METHODS: AUTONOMIC AND RESPIRATORY VARIABLES WERE ASSESSED IN 30 HEALTHY MALE VOLUNTEERS (GROUP MEAN AGE +/- SD, 29.1 +/- 5.1 YEARS) DURING FOUR MENTAL STATES DESCRIBED IN TRADITIONAL YOGA TEXTS. THESE FOUR MENTAL STATES ARE RANDOM THINKING (CANCALATA), NONMEDITATIVE FOCUSING (EKAGRATA), MEDITATIVE FOCUSING (DHARANA), AND EFFORTLESS MEDITATION (DHYANA). ASSESSMENTS WERE MADE BEFORE (5 MINUTES), DURING (20 MINUTES), AND AFTER (5 MINUTES), EACH OF THE FOUR STATES, ON FOUR SEPARATE DAYS. RESULTS: DURING DHYANA THERE WAS A SIGNIFICANT INCREASE IN THE SKIN RESISTANCE LEVEL (P<0.001; POST HOC ANALYSIS FOLLOWING ANOVA, DURING COMPARED TO PRE) AND PHOTO-PLETHYSMOGRAM AMPLITUDE (P<0.05), WHEREAS THERE WAS A SIGNIFICANT DECREASE IN THE HEART RATE (P<0.001) AND BREATH RATE (P<0.001). THERE WAS A SIGNIFICANT DECREASE IN THE LOW FREQUENCY (LF) POWER (P<0.001) AND INCREASE IN THE HIGH FREQUENCY (HF) POWER (P<0.001) IN THE FREQUENCY DOMAIN ANALYSIS OF THE HEART RATE VARIABILITY (HRV) SPECTRUM, ON WHICH HF POWER IS ASSOCIATED WITH PARASYMPATHETIC ACTIVITY. THERE WAS ALSO A SIGNIFICANT INCREASE IN THE NN50 COUNT (THE NUMBER OF INTERVAL DIFFERENCES OF SUCCESSIVE NN INTERVALS GREATER THAN 50 MS; P<0.001) AND THE PNN50 (THE PROPORTION DERIVED BY DIVIDING NN50 BY THE TOTAL NUMBER OF NN INTERVALS; P<0.001) IN TIME DOMAIN ANALYSIS OF HRV, BOTH INDICATIVE OF PARASYMPATHETIC ACTIVITY. CONCLUSIONS: MAXIMUM CHANGES WERE SEEN IN AUTONOMIC VARIABLES AND BREATH RATE DURING THE STATE OF EFFORTLESS MEDITATION (DHYANA). THE CHANGES WERE ALL SUGGESTIVE OF REDUCED SYMPATHETIC ACTIVITY AND/OR INCREASED VAGAL MODULATION. DURING DHARANA THERE WAS AN INCREASE IN SKIN RESISTANCE. THE CHANGES IN HRV DURING EKAGRATA AND CANCALATA WERE INCONCLUSIVE.	2013	
                                                                                                                                                                                                                                                                                                                                                                                                                                                             
9  452  35 CHANGES IN HEART RATE VARIABILITY AFTER YOGA ARE DEPENDENT ON HEART RATE VARIABILITY AT BASELINE AND DURING YOGA: A STUDY SHOWING AUTONOMIC NORMALIZATION EFFECT IN YOGA-NAIVE AND EXPERIENCED SUBJECTS. BACKGROUND: YOGA THERAPY IS WIDELY APPLIED TO THE MAINTENANCE OF HEALTH AND TO TREATMENT OF VARIOUS ILLNESSES. PREVIOUS RESEARCHES INDICATE THE INVOLVEMENT OF AUTONOMIC CONTROL IN ITS EFFECTS, ALTHOUGH THE GENERAL AGREEMENT HAS NOT BEEN REACHED REGARDING THE ACUTE MODULATION OF AUTONOMIC FUNCTION. AIM: THE PRESENT STUDY AIMED AT REVEALING THE ACUTE EFFECT OF YOGA ON THE AUTONOMIC ACTIVITY USING HEART RATE VARIABILITY (HRV) MEASUREMENT. METHODS: TWENTY-SEVEN HEALTHY CONTROLS PARTICIPATED IN THE PRESENT STUDY. FIFTEEN OF THEM (39.5 +/- 8.5 YEARS OLD) WERE NAIVE AND 12 (45.1 +/- 7.0 YEARS OLD) WERE EXPERIENCED IN YOGA. YOGA SKILLS INCLUDED BREATH AWARENESS, TWO TYPES OF ASANA, AND TWO TYPES OF PRANAYAMA. HRV WAS MEASURED AT THE BASELINE, DURING YOGA, AND AT THE RESTING STATE AFTER YOGA. RESULTS: IN BOTH YOGA-NAIVE AND EXPERIENCED PARTICIPANTS, THE CHANGES IN LOW-FREQUENCY (LF) COMPONENT OF HRV AND ITS RATIO TO HIGH-FREQUENCY (HF) COMPONENT (LF/HF) AFTER YOGA WERE FOUND TO BE CORRELATED NEGATIVELY WITH THE BASELINE DATA. THE CHANGES IN LF AFTER YOGA WERE ALSO CORRELATED WITH LF DURING YOGA. THE CHANGES IN HF AS WELL AS THE RAW HRV DATA AFTER YOGA WERE NOT RELATED TO THE BASELINE HRV OR THE HRV DURING YOGA. CONCLUSION: THE RESULTS INDICATE THAT YOGA LEADS TO AN INCREASE IN LF WHEN LF IS LOW AND LEADS TO A DECREASE IN LF WHEN IT IS HIGH AT THE BASELINE. THIS NORMALIZATION OF LF IS DEPENDENT ON THE AUTONOMIC MODULATION DURING YOGA AND MAY UNDERLIE THE CLINICAL EFFECTIVENESS OF YOGA THERAPY BOTH IN YOGA-NAIVE AND EXPERIENCED SUBJECTS.	2020	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           
10  439  25 CARDIOVASCULAR, CELLULAR, AND NEURAL ADAPTATIONS TO HOT YOGA VERSUS NORMAL-TEMPERATURE YOGA. CONTEXT: CHRONIC HEAT EXPOSURE PROMOTES CARDIOVASCULAR AND CELLULAR ADAPTATIONS, IMPROVING AN ORGANISM'S ABILITY TO TOLERATE SUBSEQUENT STRESSORS. HEAT EXPOSURE MAY ALSO PROMOTE NEURAL ADAPTATIONS AND ALTER THE NEURAL-HORMONAL STRESS RESPONSE. HOT-TEMPERATURE YOGA (HY) COMBINES MIND-BODY EXERCISE WITH HEAT EXPOSURE. THE ADDED HEAT COMPONENT IN HY MAY INDUCE CARDIOVASCULAR AND CELLULAR CHANGES, ALONG WITH NEURAL BENEFITS AND MODULATION OF STRESS HORMONES. AIMS: THE PURPOSE OF THE PRESENT STUDY IS TO COMPARE THE CARDIOVASCULAR, CELLULAR HEAT SHOCK PROTEIN 70 (HSP70), NEURAL, AND HORMONAL ADAPTATIONS OF HY VERSUS NORMAL-TEMPERATURE YOGA (NY). SETTINGS AND DESIGN: TWENTY-TWO SUBJECTS (MALES = 11 AND FEMALES = 11, 26 +/- 6 YEARS) COMPLETED 4 WEEKS OF NY (N = 11) OR HY (N = 11, 41 DEGREES C, 40% HUMIDITY). YOGA SESSIONS WERE PERFORMED 3 TIMES/WEEK FOLLOWING A MODIFIED BIKRAM PROTOCOL. SUBJECTS AND METHODS: PRE- AND POSTTESTING INCLUDED (1) HEMODYNAMIC MEASURES DURING A HEAT TOLERANCE TEST AND MAXIMAL AEROBIC FITNESS TEST; (2) NEURAL AND HORMONAL ADAPTATIONS USING SERUM BRAIN-DERIVED NEUROTROPHIC FACTOR (BDNF) AND ADRENOCORTICOTROPIC HORMONE (ACTH), ALONG WITH A MENTAL STRESS QUESTIONNAIRE; AND (3) CELLULAR ADAPTATIONS (HSP70) IN PERIPHERAL BLOOD MONONUCLEAR CELLS (PBMCS). STATISTICAL ANALYSIS: WITHIN- AND BETWEEN-GROUP STUDENT'S T-TEST ANALYSES WERE CONDUCTED TO COMPARE PRE- AND POST-VO2 MAX, PERCEIVED STRESS, BDNF, HSP70, AND ACTH IN HY AND NY GROUPS. RESULTS: MAXIMAL AEROBIC FITNESS INCREASED IN THE HY GROUP ONLY. NO EVIDENCE OF HEAT ACCLIMATION OR CHANGE IN MENTAL STRESS WAS OBSERVED. SERUM BDNF SIGNIFICANTLY INCREASED IN YOGA GROUPS COMBINED. ANALYSIS OF HSP70 SUGGESTED HIGHER EXPRESSION OF HSP70 IN THE HY GROUP ONLY. CONCLUSIONS: TWELVE SESSIONS OF HY PROMOTED CARDIOVASCULAR FITNESS AND CELLULAR THERMOTOLERANCE ADAPTATIONS. SERUM BDNF INCREASED IN RESPONSE TO YOGA (NY + HY) AND APPEARED TO NOT BE TEMPERATURE DEPENDENT.	2021	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       
11 1318  37 HEART RATE VARIABILITY IN CHRONIC LOW BACK PAIN PATIENTS RANDOMIZED TO YOGA OR STANDARD CARE. BACKGROUND: CHRONIC PAIN CAN ALTER THE AUTONOMIC BALANCE WITH INCREASED SYMPATHETIC ACTIVITY REFLECTED IN ALTERED HEART RATE VARIABILITY (HRV). IT HAS BEEN PROPOSED THAT YOGA CAN BE USEFUL TO CORRECT THE AUTONOMIC IMBALANCE IN PATIENTS WITH CHRONIC PAIN WHO HAVE REDUCED HRV. METHODS AND DESIGNS: IN THE PRESENT RANDOMIZED CONTROLLED TRIAL 62 PATIENTS WITH CHRONIC LOW BACK PAIN ASSOCIATED WITH ALTERED ALIGNMENT OF INTERVERTEBRAL DISCS (AGED BETWEEN 20 AND 45 YEARS, 32 MALES) WERE RANDOMIZED TO 2 GROUPS. ONE GROUP RECEIVED YOGA FOR 3 MONTHS WHILE THE OTHER GROUP CARRIED OUT STANDARD MEDICAL CARE BASED ON THE PHYSICIAN'S ADVICE. THE DURATION WAS THE SAME, I.E., 3 MONTHS. THE HEART RATE VARIABILITY AND RATE OF RESPIRATION WERE ASSESSED AT BASELINE AND AT THE END OF 3 MONTHS. RESULTS: THERE WAS A SIGNIFICANT DIFFERENCE IN THE BASELINE (PRE) VALUES BETWEEN GROUPS (P = 0.008) FOR RESPIRATION RATE WHICH WAS HIGHER IN THE YOGA GROUP. THE CHANGES REPORTED BELOW ARE PRE-POST COMPARISONS WITHIN EACH GROUP. THE YOGA GROUP SHOWED A SIGNIFICANT (P < 0.05; REPEATED MEASURES ANOVA, POST-HOC ANALYSES) DECREASE IN THE LF POWER OF HRV, RATE OF RESPIRATION AND A SIGNIFICANT INCREASE IN THE HF POWER OF HRV AND IN THE PNN50. CONCLUSION: THE RESULTS SUGGEST THAT YOGA PRACTICE CAN SHIFT THE AUTONOMIC BALANCE TOWARDS VAGAL DOMINANCE IN PATIENTS WITH CHRONIC LOW BACK PAIN ASSOCIATED WITH ALTERED ALIGNMENT OF INTERVERTEBRAL DISCS. TRIAL REGISTRATION: THE STUDY IS REGISTERED WITH THE CLINICAL TRIALS REGISTRY OF INDIA ( CTRI/2012/11/003094 ) AND CAN BE ACCESSED AT.	2016	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             
12 2760  45 YOGA PRACTITIONERS UNIQUELY ACTIVATE THE SUPERIOR PARIETAL LOBULE AND SUPRAMARGINAL GYRUS DURING EMOTION REGULATION. CHRONIC STRESS CONTRIBUTES TO BOTH MENTAL AND PHYSICAL ILLNESS. A HIGH PREVALENCE AND COST OF STRESS-RELATED ILLNESSES NORTH AMERICA WARRANTS INVESTIGATION INTO ALTERNATIVE OR COMPLEMENTARY THERAPIES WHICH MAY HELP REDUCE ADVERSE REACTIONS TO STRESSFUL STIMULI. EMOTION REGULATION IS THE PROCESS OF MONITORING AND ADJUSTING EMOTIONAL RESPONSES TO ENVIRONMENTAL STIMULI AND STRESSORS. INDIVIDUALS WHO PARTICIPATE IN PHYSICAL ACTIVITY ARE LESS LIKELY TO HAVE ADVERSE RESPONSES TO POTENTIALLY STRESSFUL SITUATIONS, POTENTIALLY DUE TO ADAPTIONS IN EMOTION REGULATION. YOGA IS A FORM OF PHYSICAL ACTIVITY INVOLVING STRETCHING EXERCISES AND MEDITATION, THAT MAY LESSEN INDIVIDUALS' LEVELS OF STRESS AND ANXIETY AND IMPROVE EMOTION REGULATION. HIGH-FREQUENCY HEART RATE VARIABILITY (HF-HRV) IS CONSIDERED A MEASURE OF PARASYMPATHETIC NERVOUS SYSTEM (PNS) ACTIVITY DURING THE EMOTION REGULATION. MEASURING HRV AND BRAIN ACTIVITY USING FUNCTIONAL MAGNETIC RESONANCE IMAGING (FMRI) OFFERS A USEFUL, NONINVASIVE APPROACH TO EVALUATING "NEUROVISCERAL" COMPONENTS OF EMOTION REGULATION. WE AIMED TO DETERMINE WHETHER YOGA PRACTITIONERS (YP) EXHIBIT DIFFERENT PATTERNS OF BRAIN ACTIVATION COMPARED TO RECREATIONAL ATHLETES (RA) WITHOUT CURRENT YOGA EXPERIENCE, WHILE VIEWING EMOTIONALLY AROUSING VISUAL STIMULI. OUR SECONDARY AIM WAS TO EXAMINE POTENTIAL DIFFERENCES ACROSS GROUPS IN HRV THROUGHOUT THE PRESENTATION OF THESE STIMULI. ANALYSIS OF FMRI DATA DURING EXPOSURE TO EMOTION-EVOKING (EE) STIMULI REVEALED THAT THE YP GROUP ACTIVATED TWO UNIQUE BRAIN AREAS, NAMELY THE SUPERIOR PARIETAL LOBULE AND THE SUPRAMARGINAL GYRUS. THESE AREAS HAVE BEEN ASSOCIATED WITH ATTENTIONAL AWARENESS AND REDUCED EGOCENTRIC BIAS, PROCESSES THAT HAVE BEEN IMPLICATED IN EMOTION REGULATION BY OTHERS. THE RA GROUP ACTIVATED THE INFERIOR MIDDLE FRONTAL CORTEX, AN AREA ASSOCIATED WITH COGNITIVE REAPPRAISAL DURING EMOTION REGULATION. THE YP GROUP ALSO DEMONSTRATED A TREND TOWARDS A HIGHER RATIO OF LOW- TO HIGH-FREQUENCY HRV COMPARED TO THE RA GROUP. THE PRESENT FINDINGS SUPPORT THE PRESENCE OF EXPERIENCE-DEPENDENT NEUROVISCERAL MECHANISMS ASSOCIATED WITH EMOTION REGULATION. INDIVIDUALS WHO PRACTICE YOGA REGULATE THEIR NEUROVISCERAL RESPONSES TO POTENTIALLY STRESSFUL EXTERNAL STIMULI IN A DIFFERENT MANNER THAN RECREATIONAL ATHLETES WHO DO NOT ENGAGE IN YOGA PRACTICE. THE PRESENT STUDY HAD A SMALL SAMPLE SIZE (RA: N = 12; YP: N = 19), WHICH SHOULD BE TAKEN INTO ACCOUNT WHEN INTERPRETING THE RESULTS.	2018	
                                              
13 2103  27 THE EFFECT OF YOGA ON FUNCTIONAL RECOVERY LEVEL IN SCHIZOPHRENIC PATIENTS. PURPOSE: THE OBJECTIVE OF THIS STUDY IS TO DETERMINE THE EFFECT OF YOGA ON FUNCTIONAL RECOVERY LEVEL IN SCHIZOPHRENIC PATIENTS. MATERIALS AND METHODS: THE STUDY WAS CONDUCTED IN QUASI-EXPERIMENTAL DESIGN WITH PRETEST-POSTTEST CONTROL GROUP. THE POPULATION OF THE STUDY CONSISTED OF SCHIZOPHRENIC PATIENTS WITH REGISTERED IN MALATYA AND ELAZIG COMMUNITY MENTAL HEALTH CENTERS AND REGULARLY GOING TO THESE CENTERS. THE SAMPLE GROUP OF THE STUDY CONSISTED OF TOTALLY 100 PATIENTS INCLUDING 50 PATIENTS IN THE EXPERIMENTAL GROUP AND 50 PATIENTS IN THE CONTROL GROUP WHO WERE SPECIFIED THROUGH POWER ANALYSIS AND CHOSEN BY USING RANDOM SAMPLING METHOD FROM THIS POPULATION. THE DATA WERE COLLECTED BETWEEN APRIL 2015 AND AUGUST 2015. 'PATIENT DESCRIPTION FORM' AND 'FROGS' WERE USED TO COLLECT THE DATA. YOGA WAS APPLIED TO PATIENTS IN THE EXPERIMENTAL GROUP. ANY INTERVENTION WAS NOT MADE TO PATIENTS IN THE CONTROL GROUP. PERCENTAGE DISTRIBUTION, ARITHMETIC MEAN, STANDARD DEVIATION, CHI-SQUARE, INDEPENDENT SAMPLES T TEST, AND PAIRED T TEST WERE USED TO ASSESS THE DATA. RESULTS: PATIENTS IN THE CONTROL AND EXPERIMENTAL GROUP PRETEST SUBSCALE AND THE TOTAL MEANS SCORES OF FROGS WAS FOUND TO BE LOW. IN THE POSTTEST SUBSCALE AND TOTAL MEANS SCORES OF FROGS IN THE EXPERIMENTAL GROUP WERE HIGHER THAN IN THE CONTROL GROUP AND THE DIFFERENCES BETWEEN THEM WERE FOUND TO BE STATISTICALLY SIGNIFICANT (P<0.05). IN THE EXPERIMENTAL GROUP PRETEST AND POSTTEST SUBSCALE AND TOTAL MEANS SCORES OF FR0GS WAS DETERMINED TO BE STATISTICALLY SIGNIFICANT (P<0.05). CONCLUSION: YOGA THAT APPLIED TO SCHIZOPHRENIC PATIENTS IT WAS DETERMINED TO INCREASED THE LEVEL OF FUNCTIONAL RECOVERY. IT CAN BE SUGGESTED THAT YOGA SHOULD BE USED AS AN COMPLEMENTARY METHOD IN NURSING PRACTISE IN ORDER TO INCREASE THE EFFECTIVENESS OF THE TREATMENT.	2016	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            
14  411  31 BLOOD PRESSURE AND HEART RATE VARIABILITY DURING YOGA-BASED ALTERNATE NOSTRIL BREATHING PRACTICE AND BREATH AWARENESS. BACKGROUND: PREVIOUS RESEARCH HAS SHOWN A REDUCTION IN BLOOD PRESSURE (BP) IMMEDIATELY AFTER THE PRACTICE OF ALTERNATE NOSTRIL YOGA BREATHING (ANYB) IN NORMAL HEALTHY MALE VOLUNTEERS AND IN HYPERTENSIVE PATIENTS OF BOTH SEXES. THE BP DURING ANYB HAS NOT BEEN RECORDED. MATERIAL/METHODS: PARTICIPANTS WERE 26 MALE VOLUNTEERS (GROUP MEAN AGE +/-SD, 23.8+/-3.5 YEARS). WE ASSESSED (1) HEART RATE VARIABILITY, (2) NON-INVASIVE ARTERIAL BP, AND (3) RESPIRATION RATE, DURING (A) ANYB AND (B) BREATH AWARENESS (BAW) SESSIONS. EACH SESSION WAS 25 MINUTES. WE PERFORMED ASSESSMENTS AT 3 TIME POINTS: PRE (5 MINUTES), DURING (15 MINUTES; FOR ANYB OR BAW) AND POST (5 MINUTES). A NAIVE-TO-YOGA CONTROL GROUP (N=15 MALES, MEAN AGE +/-SD 26.1+/-4.0 YEARS) WERE ASSESSED WHILE SEATED QUIETLY FOR 25 MINUTES. RESULTS: DURING ANYB THERE WAS A SIGNIFICANT DECREASE (REPEATED MEASURES ANOVA) IN SYSTOLIC BP AND RESPIRATION RATE; WHILE RMSSD (THE SQUARE ROOT OF THE MEAN OF THE SUM OF SQUARES OF DIFFERENCES BETWEEN ADJACENT NN INTERVALS) AND NN50 (THE NUMBER OF INTERVAL DIFFERENCES OF SUCCESSIVE NORMAL TO NORMAL INTERVALS GREATER THAN 50 MS) SIGNIFICANTLY INCREASED. DURING BAW RESPIRATION RATE DECREASED. IN CONTRAST, RESPIRATION RATE INCREASED DURING THE CONTROL STATE. ANYB AND BAW WERE SIGNIFICANTLY DIFFERENT (2-FACTOR ANOVA) IN RMSSD AND RESPIRATION RATE. BAW AND CONTROL WERE DIFFERENT WITH RESPECT TO RESPIRATION RATE. CONCLUSIONS: THE RESULTS SUGGEST THAT VAGAL ACTIVITY INCREASED DURING AND AFTER ANYB, WHICH COULD HAVE CONTRIBUTED TO THE DECREASE IN BP AND CHANGES IN THE HRV.	2014	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
15 1359  32 IMMEDIATE EFFECTS OF OM CHANTING ON HEART RATE VARIABILITY MEASURES COMPARED BETWEEN EXPERIENCED AND INEXPERIENCED YOGA PRACTITIONERS. BACKGROUND: CHANTING "OM" IS A FORM OF MEDITATION THAT HAS NUMEROUS HEALTH BENEFITS. HOWEVER, THE NEUROPHYSIOLOGICAL MECHANISMS UNDERPINNING ITS EFFECT ARE SURPRISINGLY SCARCE. THE PRESENT STUDY AIMED TO INVESTIGATE THE EFFECT OF OM CHANTING ON AUTONOMIC MODULATION, USING HEART RATE VARIABILITY (HRV), ON EXPERIENCED YOGA PRACTITIONERS AND YOGA NAIVE PERSONS. METHODS: THIS PROSPECTIVE STUDY INCLUDED 19 YOGA PRACTITIONERS (9 FEMALES AND 10 MALES; GROUP MEAN AGE +/- STANDARD DEVIATION [SD]; 25.9 +/- 3.2 YEARS) AND 17 YOGA NAIVE PERSONS (8 FEMALES AND 9 MALES; GROUP MEAN AGE +/- SD; 24.8 +/- 3.6 YEARS) OF BOTH SEXES AND SIMILAR AGE RANGE. BOTH THE GROUPS WERE ASSESSED FOR HRV INDICES (TIME AND FREQUENCY DOMAIN MEASURES) BEFORE AND AFTER LOUD OM CHANTING FOR 5 MIN. RESULTS: BASELINE COMPARISON USING MANN-WHITNEY U TEST BETWEEN GROUPS SHOWED YOGA PRACTITIONERS HAD SIGNIFICANTLY INCREASED HIGH FREQUENCY (HF) POWER (P < 0.029) THAN NONYOGA PRACTITIONERS, SIGNIFYING A STATE OF TRANQUILITY BEFORE THE CHANTING OF OM. AFTER 5 MIN OF LOUD CHANTING OF OM, A COMPARISON BETWEEN GROUPS ASSESSED USING WILCOXON SIGNED RANKS TEST REVEALED: HF POWER, A COMPONENT OF THE PARASYMPATHETIC NERVOUS SYSTEM, WAS FURTHER AMPLIFIED WITH A SIGNIFICANTLY INCREASE (P < 0.001) IN THE YOGA PRACTITIONERS GROUP COMPARED TO NONYOGA PRACTITIONERS. FURTHERMORE, THIS INCREASE IN HF POWER WAS POSITIVELY CORRELATED WITH THE YEARS OF EXPERIENCE IN YOGA. CONCLUSION: THE PRESENT STUDY SHOWED THAT A BRIEF CHANTING OF OM (5 MIN) MIGHT ENHANCE PARASYMPATHETIC NERVOUS SYSTEM ACTIVITY, PROMOTE RELAXATION, AND PROVIDE CALMNESS. FURTHER, THIS EXPERIENCE MAY BE ACHIEVED EFFECTIVELY IN INDIVIDUALS EXPERIENCED IN YOGA THAN NONYOGA PRACTITIONERS.	2022	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      
16 2727  32 YOGA NIDRA RELAXATION INCREASES HEART RATE VARIABILITY AND IS UNAFFECTED BY A PRIOR BOUT OF HATHA YOGA. OBJECTIVE: THE MEASUREMENT OF HEART RATE VARIABILITY (HRV) IS OFTEN APPLIED AS AN INDEX OF AUTONOMIC NERVOUS SYSTEM (ANS) BALANCE AND, THEREFORE, MYOCARDIAL STABILITY. PREVIOUS STUDIES HAVE SUGGESTED THAT RELAXATION OR MIND-BODY EXERCISE CAN INFLUENCE ANS BALANCE POSITIVELY AS MEASURED BY HRV BUT MAY ACT VIA DIFFERENT MECHANISMS. NO STUDIES, TO THE AUTHORS' KNOWLEDGE, HAVE EXAMINED THE ACUTE RESPONSE IN HRV TO INTERVENTIONS COMBINING RELAXATION AND MIND-BODY EXERCISE. THE OBJECTIVE OF THIS STUDY WAS TO COMPARE THE ACUTE HRV RESPONSES TO YOGA NIDRA RELAXATION ALONE VERSUS YOGA NIDRA RELAXATION PRECEDED BY HATHA YOGA. DESIGN: THIS WAS A RANDOMIZED COUNTER-BALANCED TRIAL. SETTING: THE TRIAL WAS CONDUCTED IN A UNIVERSITY EXERCISE PHYSIOLOGY LABORATORY. SUBJECTS: SUBJECTS INCLUDED 20 WOMEN AND MEN (29.15+/-6.98 YEARS OF AGE, WITH A RANGE OF 18-47 YEARS). INTERVENTIONS: PARTICIPANTS COMPLETED A YOGA PLUS RELAXATION (YR) SESSION AND A RELAXATION ONLY (R) SESSION. RESULTS: THE YR CONDITION PRODUCED SIGNIFICANT CHANGES FROM BASELINE IN HEART RATE (HR; BEATS PER MINUTE [BPM], P<0.001) AND INDICES OF HRV: R-R (MS, P<0.001), PNN50 (%, P=0.009), LOW FREQUENCY (LF; %, P=0.008) AND HIGH FREQUENCY (HF; %, P=0.035). THE R CONDITION PRODUCED SIGNIFICANT CHANGES FROM BASELINE IN HEART RATE (BPM, P<0.001) AS WELL AS INDICES OF HRV: R-R (MS, P<0.001), HF (MS(2), P=0.004), LF (%, P=0.005), HF (%, P=0.008) AND LF:HF RATIO (%, P=0.008). THERE WERE NO SIGNIFICANT DIFFERENCES BETWEEN CONDITIONS AT BASELINE NOR FOR THE CHANGES FROM BASELINE FOR ANY OF THE VARIABLES. CONCLUSIONS: THESE CHANGES DEMONSTRATE A FAVORABLE SHIFT IN AUTONOMIC BALANCE TO THE PARASYMPATHETIC BRANCH OF THE ANS FOR BOTH CONDITIONS, AND THAT YOGA NIDRA RELAXATION PRODUCES FAVORABLE CHANGES IN MEASURES OF HRV WHETHER ALONE OR PRECEDED BY A BOUT OF HATHA YOGA.	2012	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  
17 2731  27 YOGA OFFERS CARDIOVASCULAR PROTECTION IN EARLY POSTMENOPAUSAL WOMEN. CONTEXT: POSTMENOPAUSE, AN ESTROGEN DEFICIENT STATE COMES WITH INCREASED INCIDENCE OF CARDIOVASCULAR DISEASES (CVDS). YOGA HAS BEEN DESCRIBED AS HAVING A BENEFICIAL EFFECT ON HEART RATE VARIABILITY (HRV), A MARKER FOR CARDIAC AUTONOMIC ACTIVITY WHICH CAN ASSESS CARDIOVASCULAR RISK, IN VARIOUS POPULATIONS. AIM: THE AIM OF THE STUDY WAS TO STUDY THE EFFECT OF 3-MONTH LONG YOGA PRACTICE ON HRV IN EARLY POSTMENOPAUSAL WOMEN. SETTINGS AND DESIGN: A PROSPECTIVE LONGITUDINAL STUDY OF 67 WOMEN WITHIN 5 YEARS OF MENOPAUSE BETWEEN 45 AND 60 YEARS OF AGE ATTENDING MENOPAUSE CLINIC OF DEPARTMENT OF GYNAECOLOGY, SUCHETA KRIPLANI HOSPITAL FULFILLING INCLUSION AND EXCLUSION CRITERIA AND CONSENTING WERE ENROLLED FOR THE STUDY. SUBJECTS AND METHODS: HRV OF 37 CASES (YOGA GROUP) AND 30 CONTROLS (NON-YOGA GROUP) WAS RECORDED PRE AND 3-MONTH POSTINTERVENTION. STATISTICAL ANALYSIS USED: GRAPHPAD PRISM VERSION 5 SOFTWARE WAS USED. VALUES ARE A MEAN AND STANDARD ERROR OF MEAN. STATISTICAL SIGNIFICANCE WAS SET UP AT P < 0.05. RESULTS: IN HRV, FREQUENCY DOMAIN ANALYSIS SHOWED A SIGNIFICANT FALL IN LOW FREQUENCY (LF) IN NORMALIZED UNITS (NU) AND LF: HIGH FREQUENCY (HF) RATIO AND SIGNIFICANT RISE IN HF IN NU IN THE YOGA GROUP (DEPICTING PARASYMPATHETIC DOMINANCE) AGAINST A SIGNIFICANT RISE IN LF (NU) AND LF: HF RATIO AND SIGNIFICANT FALL IN HF (NU) IN NON-YOGA GROUP (INDICATING SYMPATHETIC DOMINANCE). TIME DOMAIN ANALYSIS SHOWED A SIGNIFICANT DECREASE IN STANDARD DEVIATION OF NN INTERVALS IN NON-YOGA GROUP AGAINST NONSIGNIFICANT CHANGES IN YOGA GROUP INDICATING DETERIORATION IN PARASYMPATHETIC ACTIVITY IN NON-YOGA GROUP. CONCLUSIONS: THREE-MONTH LONG YOGA PRACTICE IMPROVED HRV IN EARLY POSTMENOPAUSAL WOMEN SIGNIFICANTLY AND HAS THE POTENTIAL TO ATTENUATE THE CVD RISK IN POSTMENOPAUSAL WOMEN.	2018	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           
18 2163  29 THE EFFECTS OF YOGA AND QUIET REST ON SUBJECTIVE LEVELS OF ANXIETY AND PHYSIOLOGICAL CORRELATES: A 2-WAY CROSSOVER RANDOMIZED TRIAL. BACKGROUND: REST OR ACUTE EXERCISE CAN DECREASE STATE ANXIETY, WITH SOME EVIDENCE SHOWING EXERCISE TO PREVENT LABORATORY-INDUCED ELEVATIONS IN ANXIETY. NO STUDY HAS EXAMINED WHETHER YOGA PROVIDES SHORT-TERM PROTECTION AGAINST LABORATORY-INDUCED ANXIETY. THE AIM OF THIS STUDY WAS TO EXAMINE THE EFFECTIVENESS OF AN ACUTE YOGAFIT SESSION ON STATE ANXIETY AND MEASURES OF HEART RATE VARIABILITY (HRV) TO DETERMINE WHETHER YOGA PROVIDES SHORT-TERM PROTECTION AGAINST EMOTIONAL PICTURE STIMULI. METHODS: A RANDOMIZED REPEATED-MEASURES CROSSOVER CLINICAL TRIAL WAS PERFORMED. FORTY HEALTHY, FEMALE COLLEGE STUDENTS COMPLETED A 30 MIN SESSION OF YOGAFIT AND A TIME-MATCHED SEATED REST CONDITION ON SEPARATE DAYS. AFTER EACH CONDITION, PARTICIPANTS VIEWED 30 MIN OF EMOTIONAL PICTURE STIMULI. STATE ANXIETY, HEART RATE AND TIME-DOMAIN AND FREQUENCY-DOMAIN MEASURES OF HRV WERE ASSESSED BASELINE, POST- CONDITION, AND POST-EXPOSURE TO EMOTIONAL STIMULI. DATA WERE ANALYSED USING A CONDITION X TIME (2 X 3) REPEATED-MEASURES ANOVA. RESULTS: POST-HOC COMPARISONS INDICATE THE FOLLOWING: (1) STATE ANXIETY SIGNIFICANTLY DECREASED FROM BASELINE TO POST-CONDITION FOR BOTH YOGA AND REST (P = 0.001) BUT RETURNED TO BASELINE VALUES FOLLOWING EXPOSURE TO EMOTIONAL STIMULI (P < 0.001) FOR BOTH CONDITIONS; (2) HEART RATE DECREASED POST-CONDITION TO POST-EXPOSURE (P = 0.020) AND BASELINE TO POST-EXPOSURE (P = 0.033) FOR BOTH CONDITIONS; (3) TIME-DOMAIN MEASURE OF HRV SHOWED A SIGNIFICANT INCREASE IN HRV BETWEEN BASELINE AND POST-CONDITION (P = 0 .019), POST-CONDITION AND POST-EXPOSURE (P = 0 .007), AND BETWEEN BASELINE AND POST-EXPOSURE (P < 0.001). CONCLUSIONS: BOTH YOGAFIT AND SEATED REST WERE EFFECTIVE AT ACUTELY REDUCING STATE ANXIETY POST-CONDITION, BUT NOT AT PREVENTING AN INDUCED ANXIETY RESPONSE POST-EXPOSURE. FOLLOWING EXPOSURE TO THE EMOTIONALLY STIMULATING PICTURES, THERE WAS A SHIFT FROM THE HIGH FREQUENCY-DOMAIN TO THE LOW FREQUENCY-DOMAIN AND AN INCREASE IN THE TIME-DOMAIN MEASURE OF HRV FOR BOTH THE YOGAFIT AND THE QUIET REST CONDITION. TRIAL REGISTRATION: RETROSPECTIVELY REGISTERED 2/16/2018, CLINICALTRIALS.GOV, IDENTIFIER: NCT03458702 .	2018	
                                                                                                                                                                                                                                                                                                                                                                     
19  525  18 COMPARISON OF EFFECTS OF YOGA & PHYSICAL EXERCISE IN ATHLETES. THE EFFECT OF PRANAYAMA A CONTROLLED BREATHING PRACTICE, ON EXERCISE TESTS WAS STUDIED IN ATHLETES IN TWO PHASES; SUB-MAXIMAL AND MAXIMAL EXERCISE TESTS. AT THE END OF PHASE I (ONE YEAR) BOTH THE GROUPS (CONTROL AND EXPERIMENTAL) ACHIEVED SIGNIFICANTLY HIGHER WORK RATE AND REDUCTION IN OXYGEN CONSUMPTION PER UNIT WORK. THERE WAS A SIGNIFICANT REDUCTION IN BLOOD LACTATE AND AN INCREASE IN P/L RATIO IN THE EXPERIMENTAL GROUP, AT REST. AT THE END OF PHASE II (TWO YEARS), THE OXYGEN CONSUMPTION PER UNIT WORK WAS FOUND TO BE SIGNIFICANTLY REDUCED AND THE WORK RATE SIGNIFICANTLY INCREASED IN THE EXPERIMENTAL GROUP. BLOOD LACTATE DECREASED SIGNIFICANTLY AT REST IN THE EXPERIMENTAL GROUP ONLY. PYRUVATE AND PYRUVATE-LACTATE RATIO INCREASED SIGNIFICANTLY IN BOTH THE GROUPS AFTER EXERCISE AND AT REST IN THE EXPERIMENTAL GROUP. THE RESULTS IN BOTH PHASES SHOWED THAT THE SUBJECTS WHO PRACTISED PRANAYAMA COULD ACHIEVE HIGHER WORK RATES WITH REDUCED OXYGEN CONSUMPTION PER UNIT WORK AND WITHOUT INCREASE IN BLOOD LACTATE LEVELS. THE BLOOD LACTATE LEVELS WERE SIGNIFICANTLY LOW AT REST.	1994	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        
20 1761  24 POSITIVE THERAPEUTIC AND NEUROTROPIC EFFECTS OF YOGA IN DEPRESSION: A COMPARATIVE STUDY. CONTEXT: THERAPEUTIC EFFECT OF YOGA IN DEPRESSION IS RECOGNIZED. NEUROPLASTIC EFFECTS OF ANTIDEPRESSANT THERAPIES ARE INFERRED BY ELEVATIONS IN BRAIN-DERIVED NEUROTROPHIC FACTOR (BDNF). ROLE OF YOGA IN BOTH THESE EFFECTS HAS NOT BEEN STUDIED. MATERIALS AND METHODS: NON-SUICIDAL, CONSECUTIVE OUT-PATIENTS OF DEPRESSION WERE OFFERED YOGA EITHER ALONE OR WITH ANTIDEPRESSANTS. THE DEPRESSION SEVERITY WAS RATED ON HAMILTON DEPRESSION RATING SCALE (HDRS) BEFORE AND AT 3 MONTHS. SERUM BDNF LEVELS WERE MEASURED AT THE SAME TIME POINTS. REPEATED-MEASURES ANALYSIS OF VARIANCE WAS PERFORMED TO LOOK AT CHANGE ACROSS GROUPS WITH RESPECT TO HDRS SCORES AND BDNF LEVELS OVER 3 MONTHS OF FOLLOW-UP. RELATIONSHIP BETWEEN CHANGE IN SERUM BDNF LEVELS AND CHANGE IN HDRS SCORES WAS ASSESSED USING THE PEARSON'S CORRELATION COEFFICIENT. RESULTS: BOTH YOGA GROUPS WERE BETTER THAN DRUGS-ONLY GROUP WITH RESPECT TO REDUCTION IN HDRS SCORES. SERUM BDNF ROSE IN THE TOTAL SAMPLE IN THE 3-MONTH PERIOD. THIS WAS NOT, HOWEVER, DIFFERENT ACROSS TREATMENT GROUPS. THERE WAS A SIGNIFICANT POSITIVE CORRELATION BETWEEN FALL IN HDRS AND RISE IN SERUM BDNF LEVELS IN YOGA-ONLY GROUP (R=0.702; P=0.001), BUT NOT IN THOSE RECEIVING YOGA AND ANTIDEPRESSANTS OR ANTIDEPRESSANTS-ALONE. CONCLUSIONS: NEUROPLASTIC MECHANISMS MAY BE RELATED TO THE THERAPEUTIC MECHANISMS OF YOGA IN DEPRESSION.	2013