1 1797 179 PRENATAL YOGA: EFFECTS ON ALLEVIATION OF LABOR PAIN AND BIRTH OUTCOMES. BACKGROUND: THIS STUDY WAS CONDUCTED TO TEST THE HYPOTHESIS THAT PRENATAL YOGIC EXERCISES ARE EFFECTIVE IN ALLEVIATING LABOR PAIN AND IMPROVING BIRTH OUTCOMES, BY COMPARING PREGNANT WOMEN UNDERTAKING YOGA WITH A CONTROL GROUP. TRIAL DESIGN: SINGLE BLINDED, PARALLEL RANDOMIZED CONTROL TRIAL. METHODS: TWO HUNDRED PRIMIGRAVID WOMEN OF 30 WEEKS OF GESTATION ONWARD WHO MET THE INCLUSION CRITERIA (PRIMIGRAVIDA, 20-35 YEARS OF AGE, GESTATIONAL AGE OF 30 WEEKS, NO PRIOR EXPERIENCE OF YOGA) WERE RANDOMLY ASSIGNED TO STUDY (N = 100) AND CONTROL GROUPS (N = 100) BY USING THE MINIMIZED RANDOMIZATION PROGRAM VERSION 2.01. THE STUDY GROUP RECEIVED THE INTERVENTION IN THE FORM OF INTEGRATED YOGA CONSISTING OF A SERIES OF 30-MIN PRACTICE SESSIONS AT THE 30TH, 32ND, 34TH, 36TH, 37TH, 38TH, AND 39TH WEEKS OF GESTATIONAL AGE. THE MATCHED CONTROL GROUP DID NOT PERFORM YOGA. THE PATIENTS WERE FOLLOWED TILL DELIVERY FOR MATERNAL COMFORT, ALLEVIATION OF LABOR PAIN, AND BIRTH OUTCOME. ALLEVIATION OF LABOR PAIN WAS ASSESSED BY USING NUMERICAL PAIN INTENSITY SCALE (NPIS), PAIN BEHAVIORAL OBSERVATIONAL SCALE (PBOS), AND MATERNAL DELIVERY COMFORT QUESTIONNAIRE. ONLY THE ASSESSORS WERE BLINDED. RESULTS: TWO HUNDRED PATIENTS WERE RANDOMIZED INTO 100 EACH IN CASE AND CONTROL GROUPS. FINAL ANALYSIS WAS DONE ON 75 PATIENTS IN EACH GROUP AFTER EXCLUSION DUE TO DEVELOPMENT OF COMPLICATIONS, LOSS TO FOLLOW-UP. THE REQUIREMENT OF INDUCTION OF LABOR AND ANALGESICS WAS SIGNIFICANTLY LESS IN THE STUDY GROUP (P < 0.044, P < 0.045). THERE WAS SIGNIFICANTLY MORE NUMBER OF NORMAL VAGINAL DELIVERIES (P < 0.037) AND LESS CAESAREAN SECTIONS (P < 0.048), SHORTER FIRST STAGE OF LABOR (P < 0.0003) IN THE STUDY GROUP PRACTICING YOGA. THE TOLERANCE OF PAIN WAS BETTER IN THE STUDY GROUP AS SHOWN BY NPIS (P < 0.001) AND PBOS SCORES (P < 0.0001). POSTPARTUM, THE MATERNAL COMFORT QUESTIONNAIRE SCORE SHOWED HIGHER COMFORT IN THE STUDY GROUP (P < 0.032). THE NUMBER OF LOW BIRTH WEIGHT BABIES WAS ALSO SIGNIFICANTLY LESS IN THE STUDY GROUP (P < 0.042). THERE WERE NO ADVERSE EFFECTS ATTRIBUTED TO YOGA. CONCLUSION: THE STUDY HAS HIGHLIGHTED THAT YOGA IS A NONINVASIVE, EASY TO LEARN MIND-BODY MEDICINE AND COMPLEMENTARY HEALTH PRACTICE, EFFECTIVE IN ALLEVIATION OF LABOR PAIN AND POSSIBLY IMPROVING BIRTH OUTCOME. 2018
2 1975 45 SINGLE SESSION OF INTEGRATED "SILVER YOGA" PROGRAM IMPROVES CARDIOVASCULAR PARAMETERS IN SENIOR CITIZENS. AIM AND OBJECTIVE: THIS PILOT STUDY WAS CARRIED OUT TO DETERMINE CARDIOVASCULAR EFFECTS OF A SINGLE SESSION OF AN INTEGRATED "SILVER YOGA" PROGRAM IN SENIOR CITIZENS OF SERENE PELICAN TOWNSHIP, PONDICHERRY. MATERIALS AND METHODS: HEART RATE (HR) AND BLOOD PRESSURE (BP) MEASUREMENTS WERE RECORDED IN 124 SENIOR CITIZENS (75 FEMALE, 49 MALE) WITH MEAN AGE OF 67.19 +/- 10.61 YEAR WHO ATTENDED AN INTEGRATED "SILVER YOGA" PROGRAM AT CENTRE FOR YOGA THERAPY, EDUCATION AND RESEARCH FROM AUGUST TO OCTOBER 2014. PARTICIPANTS PRACTICED THE PROTOCOL THAT WAS SPECIALLY DESIGNED FOR SENIOR CITIZENS, KEEPING IN MIND THEIR HEALTH STATUS AND PHYSICAL LIMITATIONS. THIS INCLUDED SIMPLE WARM-UPS (JATHIS), BREATH BODY MOVEMENT COORDINATION PRACTICES (KRIYAS), STATIC STRETCHING POSTURES (ASANAS), BREATHING TECHNIQUES (PRANAYAMAS), RELAXATION AND SIMPLE CHANTING. NON-INVASIVE BP APPARATUS WAS USED TO RECORD THE HR, SYSTOLIC (SP) AND DIASTOLIC PRESSURE (DP) BEFORE AND AFTER THE 60 MIN SESSIONS. PULSE PRESSURE (PP), MEAN PRESSURE (MP), RATE-PRESSURE PRODUCT (RPP) AND DOUBLE PRODUCT (DOP) INDICES WERE DERIVED FROM THE RECORDED PARAMETERS. STUDENT'S PAIRED T-TEST WAS USED TO COMPARE DATA THAT PASSED NORMALITY TESTING BY KOLMOGOROV-SMIRNOV TEST AND WILCOXON MATCHED-PAIRS SIGNED-RANKS TEST FOR THOSE THAT DID NOT. P < 0.05 WERE ACCEPTED AS INDICATING SIGNIFICANT DIFFERENCES FOR PRE-POST COMPARISONS. RESULTS: ALL PARAMETERS WITNESSED A REDUCTION FOLLOWING THE SINGLE SESSION. THIS WAS STATISTICALLY MORE SIGNIFICANT (P < 0. 0001) IN HR, RPP AND DOP WHILE IT WAS ALSO SIGNIFICANT (P < 0.01 AND P < 0.05) IN SP AND PP, RESPECTIVELY. THE DECREASE IN MP JUST MISSED SIGNIFICANCE (P = 0.054) WHILE IT WAS NOT SIGNIFICANT IN DP. CONCLUSION: THERE IS A HEALTHY REDUCTION IN HR, BP AND DERIVED CARDIOVASCULAR INDICES FOLLOWING A SINGLE YOGA SESSION IN GERIATRIC SUBJECTS. THESE CHANGES MAY BE ATTRIBUTED TO ENHANCED HARMONY OF CARDIAC AUTONOMIC FUNCTION AS A RESULT OF COORDINATED BREATH-BODY WORK AND MIND-BODY RELAXATION DUE TO AN INTEGRATED "SILVER YOGA" PROGRAM. 2015
3 509 36 COMPARATIVE IMMEDIATE EFFECT OF DIFFERENT YOGA ASANAS ON HEART RATE AND BLOOD PRESSURE IN HEALTHY YOUNG VOLUNTEERS. INTRODUCTION: THIS STUDY PLANNED TO COMPARE IMMEDIATE CARDIOVASCULAR EFFECTS OF DIFFERENT YOGA ASANAS IN HEALTHY YOUNG VOLUNTEERS. MATERIALS AND METHODS: HEART RATE (HR), SYSTOLIC PRESSURE (SP), AND DIASTOLIC PRESSURE (DP), BLOOD PRESSURE (BP), WERE RECORDED USING THE NON INVASIVE BLOOD PRESSURE (NIBP) APPARATUS IN 22 HEALTHY YOUNG SUBJECTS, BEFORE AND AFTER THE PERFORMANCE OF DHANURASANA (DA), VAKRASANA (VA) (BOTH SIDES), JANUSIRASASANA (JSA) (BOTH SIDES), MATSYASANA AND SHAVASANA FOR 30 S. HR AND BP WERE FURTHER RECORDED DURING SUPINE RECOVERY AT 2, 4, 6, 8, AND 10 MIN. A REPEATED MEASURE OF ANOVA WAS USED FOR STATISTICAL ANALYSIS. RESULTS: THERE WERE SIGNIFICANT CHANGES IN HR AND BP BOTH IMMEDIATELY AFTER THE ASANAS AS WELL AS DURING THE RECOVERY PERIOD. OVERALL COMPARISONS OF % CHANGES IMMEDIATELY AFTER THE PERFORMANCE OF THE ASANAS REVEALED SIGNIFICANT DIFFERENCES WITH REGARD TO HR THAT INCREASED SIGNIFICANTLY AFTER DA. IN THE RECOVERY PHASE, THERE WERE SIGNIFICANT INTERGROUP DIFFERENCES FROM 2 MIN ONWARD IN BOTH SP AND DP. THE DECREASE OF SP AFTER VA (RIGHT SIDE) (VA-R) WAS SIGNIFICANTLY GREATER THAN SHAVASANA (4(TH), 6(TH), AND 8(TH) MIN) AND JSA (LEFT SIDE) (JSA-L) AT 6(TH) AND 8(TH) MIN. DP DECREASED SIGNIFICANTLY AFTER PERFORMING JSA-L COMPARED TO VA-R AT THE 6(TH) AND 8(TH) MIN. DISCUSSION: THE CARDIOVASCULAR CHANGES IMMEDIATELY AFTER THE ASANAS AND DURING THE RECOVERY PHASE REVEAL INHERENT DIFFERENCES BETWEEN THE SELECTED POSTURES. THE RISE OF HR IN DA MAY BE ATTRIBUTED TO INCREASED SYMPATHETIC RESPONSE DUE TO THE RELATIVE DIFFICULTY OF THE POSTURE AS WELL AS ABDOMINAL COMPRESSION OCCURRING IN IT. THE EFFECT OF SUPINE RELAXATION IS MORE PRONOUNCED AFTER THE PERFORMANCE OF THE ASANAS AS COMPARED TO MERE RELAXATION IN SHAVASANA. THIS MAY BE ATTRIBUTED TO A NORMALIZATION AND RESULTANT HOMEOSTATIC EFFECT OCCURRING DUE TO A GREATER, HEALTHIER DE-ACTIVATION OF THE AUTONOMIC NERVOUS SYSTEM OCCURRING TOWING TO THE PRESENCE OF PRIOR ACTIVATION. THERE WERE ALSO SUBTLE DIFFERENCES BETWEEN THE RIGHT SIDED AND LEFT SIDED PERFORMANCE OF VA AND JSA THAT MAY BE OCCURRING DUE TO THE DIFFERENT INTERNAL STRUCTURES BEING EITHER COMPRESSED OR RELAXED ON EITHER SIDE. CONCLUSION: OUR STUDY PROVIDES INITIAL EVIDENCE OF DIFFERENTIAL CARDIOVASCULAR EFFECTS OF ASANAS AND SUBTLE DIFFERENCES BETWEEN RIGHT AND LEFT SIDED PERFORMANCE. FURTHER, CARDIOVASCULAR RECOVERY IS GREATER AFTER THE PERFORMANCE OF THE ASANAS AS COMPARED TO SHAVASAN; THUS, IMPLYING A BETTER RESPONSE WHEN EFFORT PRECEDES RELAXATION. 2014
4 350 39 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
5 2678 34 YOGA IN SCHOOL SETTINGS: A RESEARCH REVIEW. RESEARCH ON THE EFFICACY OF YOGA FOR IMPROVING MENTAL, EMOTIONAL, PHYSICAL, AND BEHAVIORAL HEALTH CHARACTERISTICS IN SCHOOL SETTINGS IS A RECENT BUT GROWING FIELD OF INQUIRY. THIS SYSTEMATIC REVIEW OF RESEARCH ON SCHOOL-BASED YOGA INTERVENTIONS PUBLISHED IN PEER-REVIEWED JOURNALS OFFERS A BIBLIOMETRIC ANALYSIS THAT IDENTIFIED 47 PUBLICATIONS. THE STUDIES FROM THESE PUBLICATIONS HAVE BEEN CONDUCTED PRIMARILY IN THE UNITED STATES (N = 30) AND INDIA (N = 15) SINCE 2005, WITH THE MAJORITY OF STUDIES (N = 41) CONDUCTED FROM 2010 ONWARD. ABOUT HALF OF THE PUBLICATIONS WERE OF STUDIES AT ELEMENTARY SCHOOLS; MOST (85%) WERE CONDUCTED WITHIN THE SCHOOL CURRICULUM, AND MOST (62%) ALSO IMPLEMENTED A FORMAL SCHOOL-BASED YOGA PROGRAM. THERE WAS A HIGH DEGREE OF VARIABILITY IN YOGA INTERVENTION CHARACTERISTICS, INCLUDING OVERALL DURATION, AND THE NUMBER AND DURATION OF SESSIONS. MOST OF THESE PUBLISHED RESEARCH TRIALS ARE PRELIMINARY IN NATURE, WITH NUMEROUS STUDY DESIGN LIMITATIONS, INCLUDING LIMITED SAMPLE SIZES (MEDIAN = 74; RANGE = 20-660) AND RELATIVELY WEAK RESEARCH DESIGNS (57% RANDOMIZED CONTROLLED TRIALS, 19% UNCONTROLLED TRIALS), AS WOULD BE EXPECTED IN AN INFANT RESEARCH FIELD. NEVERTHELESS, THESE PUBLICATIONS SUGGEST THAT YOGA IN THE SCHOOL SETTING IS A VIABLE AND POTENTIALLY EFFICACIOUS STRATEGY FOR IMPROVING CHILD AND ADOLESCENT HEALTH AND THEREFORE WORTHY OF CONTINUED RESEARCH. 2016
6 411 33 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
7 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
8 688 65 EFFECT OF ANTENATAL EXERCISES, INCLUDING YOGA, ON THE COURSE OF LABOR, DELIVERY AND PREGNANCY: A RETROSPECTIVE STUDY. BACKGROUND: DELIVERING A CHILD IS A VERY STRESSFUL EXPERIENCE FOR WOMEN. PREGNANCY AND LABOR ENTAIL COMPLEX EVENTS THAT ARE UNIQUE TO EACH INDIVIDUAL FEMALE. THE MANAGEMENT OF LABOR PAIN IS OFTEN DONE USING ANALGESICS AND ANESTHESIA, WHICH HAVE BEEN SHOWN TO HAVE SOME SIDE EFFECTS. MORE COMPREHENSIVE DATA ARE NEEDED TO PROVIDE CLINICALLY SIGNIFICANT EVIDENCE FOR CLINICIANS TO CONFIDENTLY PRESCRIBE EXERCISES TO PATIENTS. THIS STUDY WAS DONE TO EVALUATE THE EFFECT OF ANTENATAL EXERCISES, INCLUDING YOGA, ON THE COURSE OF LABOR, DELIVERY, AND PREGNANCY OUTCOMES. METHODS: A RETROSPECTIVE STUDY WAS CONDUCTED AMONG 200 PRIMIPAROUS SUBJECTS (AGED 20-40). A QUESTIONNAIRE WAS PROVIDED TO THE SUBJECTS TO OBTAIN THEIR DEMOGRAPHIC AND OBSTETRICAL INFORMATION 6 WEEKS AFTER DELIVERY, AND THEIR HOSPITAL RECORDS WERE ALSO ASSESSED FOR FURTHER DETAILS. BASED ON THE NATURE AND DETAILS OBTAINED FOR THE ANTENATAL EXERCISES, SUBJECTS WERE DIVIDED INTO TWO GROUPS: CONTROL AND EXERCISE. OUTCOME MEASURES INCLUDED THE NEED FOR LABOR INDUCTION, SELF-PERCEIVED PAIN AND PERCEIVED EXERTION DURING LABOR, DURATION AND NATURE OF THE DELIVERY, NEWBORN INFANT WEIGHT, MATERNAL WEIGHT GAIN, HISTORY OF BACK PAIN, AND POST-PARTUM RECOVERY. THE TOTAL MATERNAL WEIGHT GAIN (IN KILOGRAMS) WAS CALCULATED FROM WEIGHT AT 6 WEEKS AFTER DELIVERY MINUS THE WEIGHT AT 12-14 WEEKS OF GESTATION. BACK PAIN DURING PREGNANCY AND SELF-PERCEIVED LABOR PAIN WERE MEASURED USING A VISUAL ANALOG SCALE (VAS). THE OVERALL PERCEIVED EXERTION DURING LABOR WAS MEASURED USING AN ADAPTED BORG SCALE FOR PERCEIVED EFFORT. RESULTS: THE SUBJECTS WHO FOLLOWED REGULAR ANTENATAL EXERCISES, INCLUDING YOGA, HAD SIGNIFICANTLY LOWER RATES OF CESAREAN SECTION, LOWER WEIGHT GAIN, HIGHER NEWBORN INFANT WEIGHT, LOWER PAIN AND OVERALL DISCOMFORT DURING LABOR, LOWER BACK PAIN THROUGHOUT PREGNANCY, AND EARLIER POST-PARTUM RECOVERY COMPARED TO THOSE WHO DID NO SPECIFIC EXERCISES OR ONLY WALKED DURING PREGNANCY. CONCLUSIONS: THIS RETROSPECTIVE STUDY SHOWED THAT REGULAR ANTENATAL EXERCISES, INCLUDING YOGA, RESULT IN BETTER OUTCOMES RELATED TO THE COURSE OF LABOR, DELIVERY, AND PREGNANCY. THESE RESULTS NOTABLY INDICATED THAT PREGNANT WOMEN SHOULD BE ACTIVE THROUGHOUT PREGNANCY AND FOLLOW A SUPERVISED EXERCISE PROGRAM THAT INCLUDES YOGA UNLESS CONTRAINDICATED. WE REQUIRE FURTHER LARGE-SCALE PROSPECTIVE STUDIES AND QUASI-EXPERIMENTAL TRIALS TO CONFIRM THE OBSERVED FINDINGS. 2020
9 758 33 EFFECT OF SLOW BREATHING ON AUTONOMIC TONE & BAROREFLEX SENSITIVITY IN YOGA PRACTITIONERS. BACKGROUND & OBJECTIVES: SLOW BREATHING INCREASES PARASYMPATHETIC ACTIVITY AND BAROREFLEX SENSITIVITY (BRS) IN HEALTHY INDIVIDUALS, ALSO SIMILARLY OBSERVED IN YOGA PRACTITIONERS. PRANAYAMA WHICH IS AN IMPORTANT COMPONENT OF YOGA WHEN PRACTICED AT A SLOW PACE WAS AT A RESPIRATORY FREQUENCY OF AROUND 0.1 HZ (6 BREATHS/MIN). THEREFORE, IT WAS HYPOTHESIZED THAT YOGA PRACTITIONERS MIGHT HAVE ADAPTED TO SLOW BREATHING. THIS STUDY WAS AIMED TO DECIPHER THE ROLE OF YOGA ON CARDIOVASCULAR VARIABILITY DURING SLOW BREATHING (0.1 HZ) IN YOGA PRACTITIONERS. METHODS: A CROSS-SECTIONAL STUDY WAS UNDERTAKEN IN NAIVE-TO-YOGA INDIVIDUALS (N=40) AND YOGA PRACTITIONERS (N=40) WITH AN AVERAGE AGE OF 31.08 +/- 7.31 AND 29.93 +/- 7.57 YR, RESPECTIVELY. THE ANALYSIS OF HEART RATE VARIABILITY, BLOOD PRESSURE VARIABILITY (BPV) AND BRS DURING SPONTANEOUS AND SLOW BREATHING WAS COMPARED BETWEEN THE TWO GROUPS. RESULTS: DURING SLOW BREATHING, THE HEART RATE (P<0.01) WAS LOWER, RESPIRATORY RATE INTERVAL (P<0.05) AND PNN50 PER CENT (P=0.01) WERE HIGHER, MEAN SYSTOLIC BP (SBP) (P<0.05) AND SDSD (STANDARD DEVIATION OF SUCCESSIVE BEAT TO BEAT SYSTOLIC BLOOD PRESSURE DIFFERENCES) (P<0.01) OF SBP VARIABILITY WERE LOWER WITH SEQUENCE BRS (P<0.001) AND ALPHA LOW FREQUENCY (P<0.01) AND ALPHA HIGH FREQUENCY (P<0.001) OF SPECTRAL BRS WERE HIGHER IN YOGA PRACTITIONERS. INTERPRETATION & CONCLUSIONS: THE PRESENT STUDY INDICATED HIGHER PARASYMPATHETIC ACTIVITY AND BRS WITH LOWER SBP VARIABILITY AT REST AND DURING SLOW BREATHING IN YOGA PRACTITIONERS COMPARED TO NAIVE GROUP. FINDINGS INDICATE THAT THE SHORT-TERM PRACTICE OF SLOW BREATHING COMPLEMENTS THE AUGMENTED PARASYMPATHETIC ACTIVITY AND BRS IN THE YOGA GROUP. 2020
10 370 36 AUTONOMIC TONE AND BAROREFLEX SENSITIVITY DURING 70 DEGREES HEAD-UP TILT IN YOGA PRACTITIONERS. INTRODUCTION: THE INTERVENTION OF YOGA WAS SHOWN TO IMPROVE THE AUTONOMIC CONDITIONING IN HUMANS EVIDENT FROM THE ENHANCEMENT OF PARASYMPATHETIC ACTIVITY AND BAROREFLEX SENSITIVITY (BRS). FROM THE DOCUMENTED HEALTH BENEFITS OF YOGA, WE HYPOTHESIZED THAT THE EXPERIENCE OF YOGA MAY RESULT IN ADAPTATION TO THE ORTHOSTATIC STRESS DUE TO ENHANCED BRS. AIM: TO DECIPHER THE EFFECTS OF YOGA IN THE MODULATION OF AUTONOMIC FUNCTION DURING ORTHOSTATIC CHALLENGE. MATERIALS AND METHODS: THIS WAS A COMPARATIVE STUDY DESIGN CONDUCTED IN AUTONOMIC FUNCTION TEST LAB, OF THE DEPARTMENT OF PHYSIOLOGY, ALL INDIA INSTITUTE OF MEDICAL SCIENCES, NEW DELHI, INDIA. HEART RATE VARIABILITY (HRV), BLOOD PRESSURE VARIABILITY, AND BRS WERE ANALYZED ON FORTY NAIVE TO YOGA (NY) SUBJECTS AND FORTY YOGA PRACTITIONERS WITH AN AVERAGE AGE OF 31.08 +/- 7.31 YEARS AND 29.93 +/- 7.57 YEARS, RESPECTIVELY. ALL PARTICIPANTS WERE HEALTHY. SEVENTY DEGREES HEAD UP TILT (HUT) WAS USED AS AN INTERVENTION TO EVALUATE THE CARDIOVASCULAR VARIABILITY DURING ORTHOSTATIC CHALLENGE. RESULTS: DURING HUT, THE R-R INTERVAL (P = 0.042), ROOT MEAN SQUARE OF SUCCESIVE R-R INTERVAL DIFFERENCES (RMSSD) (P = 0.039), STANDARD DEVIATION OF INSTANTANEOUS BEAT-TO-BEAT R-R INTERVAL VARIABILITY (SD1) (P = 0.039) OF HRV, AND SEQUENCE BRS (P = 0.017) AND ALPHA LOW FREQUENCY OF SPECTRAL BRS (P = 0.002) WERE HIGHER IN THE YOGA GROUP. THE DELTA DECREASE IN RRI (P = 0.033) AND BRS (P < 0.01) WAS HIGHER IN THE YOGA GROUP THAN THE NY GROUP. CONCLUSION: THE EFFERENT VAGAL ACTIVITY AND BRS WERE HIGHER IN YOGA PRACTITIONERS. THE DELTA CHANGE (DECREASE) IN PARASYMPATHETIC ACTIVITY AND BRS WAS HIGHER, WITH RELATIVELY STABLE SYSTOLIC BLOOD PRESSURE INDICATING AN ADAPTIVE RESPONSE TO ORTHOSTATIC CHALLENGE BY THE YOGA PRACTITIONERS COMPARED TO THE NY GROUP. 2020
11 2524 45 YOGA DURING PREGNANCY: EFFECTS ON MATERNAL COMFORT, LABOR PAIN AND BIRTH OUTCOMES. THIS STUDY EXAMINED THE EFFECTS OF A YOGA PROGRAM DURING PREGNANCY, ON MATERNAL COMFORT, LABOR PAIN, AND BIRTH OUTCOMES. A RANDOMIZED TRIAL WAS CONDUCTED USING 74-PRIMIGRAVID THAI WOMEN WHO WERE EQUALLY DIVIDED INTO TWO GROUPS (EXPERIMENTAL AND CONTROL). THE YOGA PROGRAM INVOLVED SIX, 1-H SESSIONS AT PRESCRIBED WEEKS OF GESTATION. A VARIETY OF INSTRUMENTS WERE USED TO ASSESS MATERNAL COMFORT, LABOR PAIN AND BIRTH OUTCOMES. THE EXPERIMENTAL GROUP WAS FOUND TO HAVE HIGHER LEVELS OF MATERNAL COMFORT DURING LABOR AND 2H POST-LABOR, AND EXPERIENCED LESS SUBJECT EVALUATED LABOR PAIN THAN THE CONTROL GROUP. IN EACH GROUP, PAIN INCREASED AND MATERNAL COMFORT DECREASED AS LABOR PROGRESSED. NO DIFFERENCES WERE FOUND, BETWEEN THE GROUPS, REGARDING PETHIDINE USAGE, LABOR AUGMENTATION OR NEWBORN APGAR SCORES AT 1 AND 5 MIN. THE EXPERIMENTAL GROUP WAS FOUND TO HAVE A SHORTER DURATION OF THE FIRST STAGE OF LABOR, AS WELL AS THE TOTAL TIME OF LABOR. 2008
12 1317 34 HEART RATE VARIABILITY CHANGES DURING HIGH FREQUENCY YOGA BREATHING AND BREATH AWARENESS. BACKGROUND: PRE AND POST COMPARISON AFTER ONE MINUTE OF HIGH FREQUENCY YOGA BREATHING (HFYB) SUGGESTED THAT THE HFYB MODIFIES THE AUTONOMIC STATUS BY INCREASING SYMPATHETIC MODULATION, BUT ITS EFFECT DURING THE PRACTICE WAS NOT ASSESSED. METHODS: THIRTY-EIGHT MALE VOLUNTEERS WITH GROUP AVERAGE AGE +/- S.D., 23.3 +/- 4.4 YEARS WERE EACH ASSESSED ON TWO SEPARATE DAYS IN TWO SESSIONS, (I) HFYB AND (II) BREATH AWARENESS. EACH SESSION WAS FOR 35 MINUTES, WITH 3 PERIODS, I.E., PRE (5 MINUTES), DURING HFYB OR BREATH AWARENESS (15 MINUTES) AND POST (5 MINUTES). RESULTS: THERE WAS A SIGNIFICANT DECREASE IN NN50, PNN50 AND THE MEAN RR INTERVAL DURING AND AFTER HFYB AND AFTER BREATH AWARENESS, COMPARED TO THE RESPECTIVE 'PRE' VALUES (P < 0.05) (REPEATED MEASURES ANOVA FOLLOWED BY POST-HOC ANALYSIS). THE LF POWER INCREASED AND HF POWER DECREASED DURING AND AFTER BREATH AWARENESS AND LF/HF RATIO INCREASED AFTER BREATH AWARENESS (P < 0.05). CONCLUSION: THE RESULTS SUGGEST THAT THERE WAS REDUCED PARASYMPATHETIC MODULATION DURING AND AFTER HFYB AND INCREASED SYMPATHETIC MODULATION WITH REDUCED PARASYMPATHETIC MODULATION DURING AND AFTER BREATH AWARENESS. 2011
13 2525 53 YOGA DURING PREGNANCY: THE EFFECTS ON LABOR PAIN AND DELIVERY OUTCOMES (A RANDOMIZED CONTROLLED TRIAL). OBJECTIVE: TO INVESTIGATE THE EFFECTS OF AN ANTENATAL YOGA PROGRAM ON PERCEIVED MATERNAL LABOR PAIN AND DELIVERY OUTCOMES. MATERIAL & METHODS: THIS RANDOMIZED CONTROL TRIAL WAS CONDUCTED WITH SIXTY PRIMIPAROUS WOMEN, AGED 18-35 YEARS OLD, WHO WERE RANDOMLY ASSIGNED TO EITHER AN ANTENATAL YOGA PROGRAM OR CONTROL GROUPS. LABOR PAIN AND DISCOMFORT LEVEL OF THE PARTICIPANTS WERE MEASURED USING A VISUAL ANALOGUE SCALE AT CERVICAL DILATATION OF 3-4 C AND AT 2 AND 4 H AFTER THE INITIAL MEASUREMENT. DEMOGRAPHIC AND OBSTETRICAL INFORMATION WERE COLLECTED. THE ANTENATAL YOGA PROGRAM CONSISTED OF A 1-H SUPERVISED YOGA CLASS, THREE TIMES A WEEKLY, STARTING AT 26 WEEKS GESTATION. . RESULTS: PARTICIPANTS IN CONTROL GROUP REPORTED HIGHER PAIN INTENSITY COMPARED TO EXPERIMENTAL GROUP AT 3-4 CM OF DILATATION (P = 0.01) AND AT 2 H AFTER THE FIRST AND THE SECOND MEASUREMENTS (P = 0.000). MOTHERS IN THE ANTENATAL INTERVENTION GROUP THAT COMPLETED THE YOGA CLASS REQUIRED A DECREASED FREQUENCY OF LABOR INDUCTION IN COMPARISON WITH CONTROL GROUP (P = 0.008). IN ADDITION, MODE OF DELIVERY OF THE INTERVENTION GROUP RESULTED IN A LOWER PERCENTAGE OF CESAREAN SECTION THAN CONTROL GROUP (P = 0.002). LASTLY, THE INTERVENTION GROUP EXPERIENCED A SHORTER DURATION OF THE SECOND AND THIRD STAGES OF LABOR. INTERVAL LEVEL DATA WAS ANALYZED BY USING AN INDEPENDENT T-TEST AND CHI-SQUARE. CONCLUSION: YOGA DURING PREGNANCY MAY CONTRIBUTE TO A REDUCTION PAIN OF LABOR AND IMPROVED ADEQUACY OF CHILDBIRTH. 2017
14 267 62 ACUTE FETAL BEHAVIORAL RESPONSE TO PRENATAL YOGA: A SINGLE, BLINDED, RANDOMIZED CONTROLLED TRIAL (TRY YOGA). BACKGROUND: IN 2012, YOGA WAS PRACTICED BY 20 MILLION AMERICANS, OF WHOM 82% WERE WOMEN. A RECENT LITERATURE REVIEW ON PRENATAL YOGA NOTED A REDUCTION IN SOME PREGNANCY COMPLICATIONS (IE, PRETERM BIRTH, LUMBAR PAIN, AND GROWTH RESTRICTION) IN THOSE WHO PRACTICED YOGA; TO DATE, THERE IS NO EVIDENCE ON FETAL RESPONSE AFTER YOGA. OBJECTIVES: WE AIMED TO CHARACTERIZE THE ACUTE CHANGES IN MATERNAL AND FETAL RESPONSE TO PRENATAL YOGA EXERCISES USING COMMON STANDARDIZED TESTS TO ASSESS THE WELL-BEING OF THE MATERNAL-FETAL UNIT. STUDY DESIGN: WE CONDUCTED A SINGLE, BLINDED, RANDOMIZED CONTROLLED TRIAL. UNCOMPLICATED PREGNANCIES BETWEEN 28 0/7 AND 36 6/7 WEEKS WITH A NONANOMALOUS SINGLETON FETUS OF WOMEN WHO DID NOT SMOKE, USE NARCOTICS, OR HAVE PRIOR EXPERIENCE WITH YOGA WERE INCLUDED. A COMPUTER-GENERATED SIMPLE RANDOMIZATION SEQUENCE WITH A 1:1 ALLOCATION RATIO WAS USED TO RANDOMIZE PARTICIPANTS INTO THE YOGA OR CONTROL GROUP. WOMEN IN THE YOGA GROUP PARTICIPATED IN A 1-TIME, 1 HOUR YOGA CLASS WITH A CERTIFIED INSTRUCTOR WHO TAUGHT A PREDETERMINED YOGA SEQUENCE. IN THE CONTROL GROUP, EACH PARTICIPANT ATTENDED A 1-TIME, 1 HOUR POWERPOINT PRESENTATION BY AN OBSTETRICIAN ON AMERICAN CONGRESS OF OBSTETRICIANS AND GYNECOLOGISTS RECOMMENDATIONS FOR EXERCISE, NUTRITION, AND OBESITY IN PREGNANCY. ALL PARTICIPANTS UNDERWENT PRE- AND POSTINTERVENTION TESTING, WHICH CONSISTED OF UMBILICAL AND UTERINE ARTERY DOPPLER ULTRASOUND, NONSTRESS TESTING, A BIOPHYSICAL PROFILE, MATERNAL BLOOD PRESSURE, AND MATERNAL HEART RATE. A BOARD-CERTIFIED MATERNAL-FETAL MEDICINE SPECIALIST, AT A DIFFERENT TERTIARY CENTER, INTERPRETED ALL NONSTRESS TESTS AND BIOPHYSICAL PROFILE DATA AND WAS BLINDED TO GROUP ASSIGNMENT AND PRE- OR POSTINTERVENTION TESTING. THE PRIMARY OUTCOME WAS A CHANGE IN UMBILICAL ARTERY DOPPLER SYSTOLIC TO DIASTOLIC RATIO. SAMPLE SIZE CALCULATIONS INDICATED 19 WOMEN PER GROUP WOULD BE SUFFICIENT TO DETECT THIS DIFFERENCE IN DOPPLER INDICES (ALPHA, 0.05; POWER, 80%). DATA WERE ANALYZED USING A REPEATED-MEASURES ANALYSIS OF VARIANCE, A CHI(2), AND A FISHER EXACT TEST. A VALUE OF P < .05 WAS CONSIDERED SIGNIFICANT. RESULTS: OF THE 52 WOMEN RANDOMIZED, 46 (88%) COMPLETED THE STUDY. THERE WAS NO CLINICALLY SIGNIFICANT CHANGE IN UMBILICAL ARTERY SYSTOLIC TO DIASTOLIC RATIO (P = .34), PULSATILITY INDEX (P = .53), OR RESISTANCE INDEX (P = .66) BETWEEN THE 2 GROUPS BEFORE AND AFTER THE INTERVENTION. FETAL AND MATERNAL HEART RATE, MATERNAL BLOOD PRESSURE, AND UTERINE ARTERY DOPPLERS REMAINED UNCHANGED OVER TIME. WHEN UMBILICAL ARTERY INDICES WERE INDIVIDUALLY COMPARED WITH GESTATIONAL AGE REFERENCES, THERE WAS NO DIFFERENCE BETWEEN THOSE WHO IMPROVED OR WORSENED BETWEEN THE GROUPS. CONCLUSION: THERE WAS NO SIGNIFICANT CHANGE IN FETAL BLOOD FLOW ACUTELY AFTER PERFORMING YOGA FOR THE FIRST TIME IN PREGNANCY. YOGA CAN BE RECOMMENDED FOR LOW-RISK WOMEN TO BEGIN DURING PREGNANCY. 2016
15 1353 30 IMMEDIATE EFFECT OF SPECIFIC NOSTRIL MANIPULATING YOGA BREATHING PRACTICES ON AUTONOMIC AND RESPIRATORY VARIABLES. THE EFFECT OF RIGHT, LEFT, AND ALTERNATE NOSTRIL YOGA BREATHING (I.E., RNYB, LNYB, AND ANYB, RESPECTIVELY) WERE COMPARED WITH BREATH AWARENESS (BAW) AND NORMAL BREATHING (CTL). AUTONOMIC AND RESPIRATORY VARIABLES WERE STUDIED IN 21 MALE VOLUNTEERS WITH AGES BETWEEN 18 AND 45 YEARS AND EXPERIENCE IN THE YOGA BREATHING PRACTICES BETWEEN 3 AND 48 MONTHS. SUBJECTS WERE ASSESSED IN FIVE EXPERIMENTAL SESSIONS ON FIVE SEPARATE DAYS. THE SESSIONS WERE IN FIXED POSSIBLE SEQUENCES AND SUBJECTS WERE ASSIGNED TO A SEQUENCE RANDOMLY. EACH SESSION WAS FOR 40 MIN; 30 MIN FOR THE BREATHING PRACTICE, PRECEDED AND FOLLOWED BY 5 MIN OF QUIET SITTING. ASSESSMENTS INCLUDED HEART RATE VARIABILITY, SKIN CONDUCTANCE, FINGER PLETHYSMOGRAM AMPLITUDE, BREATH RATE, AND BLOOD PRESSURE. FOLLOWING RNYB THERE WAS A SIGNIFICANT INCREASE IN SYSTOLIC, DIASTOLIC AND MEAN PRESSURE. IN CONTRAST, THE SYSTOLIC AND DIASTOLIC PRESSURE DECREASED AFTER ANYB AND THE SYSTOLIC AND MEAN PRESSURE WERE LOWER AFTER LNYB. HENCE, UNILATERAL NOSTRIL YOGA BREATHING PRACTICES APPEAR TO INFLUENCE THE BLOOD PRESSURE IN DIFFERENT WAYS. THESE EFFECTS SUGGEST POSSIBLE THERAPEUTIC APPLICATIONS. 2008
16 2088 52 THE EFFECT OF PRACTICING YOGA DURING PREGNANCY ON LABOR STAGES LENGTH, ANXIETY AND PAIN: A RANDOMIZED CONTROLLED TRIAL. BACKGROUND: ANXIETY AND FEAR OF LABOR PAIN HAS LED TO ELEVATED CESAREAN SECTION RATE IN SOME COUNTRIES. THIS STUDY WAS CONDUCTED TO INVESTIGATE THE EFFECT OF YOGA IN PREGNANCY ON ANXIETY, LABOR PAIN AND LENGTH OF LABOR STAGES. METHODS: THIS CLINICAL TRIAL STUDY WAS PERFORMED ON 84 NULLIPAROUS WOMEN WHO WERE AT LEAST 18 YEARS OLD AND WERE RANDOMLY DIVIDED INTO TWO GROUPS OF YOGA AND CONTROL GROUPS. PREGNANCY YOGA PROGRAM CONSISTING OF 6 60-MIN TRAINING SESSIONS WAS STARTED EVERY 2 WEEKS FROM WEEK 26 OF PREGNANCY AND CONTINUED UNTIL 37 WEEKS OF GESTATION. ANXIETY SEVERITY AT MATERNAL ADMISSION TO LABOR WAS MEASURED BY THE SPIELBERGERS STATE-TRAIT ANXIETY INVENTORY, AND LABOR PAIN WAS MEASURED BY VISUAL ANALOGUE SCALE (VAS) AT DILATATION (4-5 CM) AND 2 H AFTER THE FIRST MEASUREMENT. DATA WERE ANALYZED USING CHI-SQUARE AND T-TEST. RESULTS: INTERVENTION GROUP REPORTED LESS PAIN AT DILATATION (4-5 CM) (P=0.001) AND 2 H AFTER THE FIRST MEASUREMENT (P=0.001) THAN THE CONTROL GROUP. STAT ANXIETY WAS ALSO LOWER IN INTERVENTION GROUP THAN THE CONTROL GROUP (P=0.003) AT THE ENTRANCE TO LABOR ROOM. SUBJECTS IN THE CONTROL GROUP REQUIRED MORE INDUCTION COMPARED TO INTERVENTION GROUP (P=0.003). WOMEN IN INTERVENTION GROUP EXPERIENCED SHORTER DURATION OF THE FIRST PHASE OF THE LABOR THAN THE CONTROL GROUP (P=0.002). ALSO, THE TOTAL DURATION OF TWO STAGES OF LABOR WAS SHORTER IN INTERVENTION GROUP THAN THE CONTROL GROUP (P=0.003). CONCLUSIONS: PRACTICING YOGA DURING PREGNANCY MAY REDUCE WOMEN'S ANXIETY DURING LABOR; SHORTEN LABOR STAGES, AND LOWER LABOR PAIN. 2020
17 2213 24 THE HYPOTENSIVE EFFECT OF YOGA'S BREATHING EXERCISES: A SYSTEMATIC REVIEW. THE AIM OF THIS REVIEW WAS TO EVALUATE THE EFFECT OF PRANAYAMA (YOGA'S BREATHING EXERCISES) ON BP AND ITS APPLICABILITY IN THE TREATMENT OF HYPERTENSION. THIRTEEN TRIALS, ASSESSING ACUTE (EIGHT STUDIES) AND CHRONIC (FIVE STUDIES) BP RESPONSE TO PRANAYAMA WERE INCLUDED. SIGNIFICANT BP REDUCTIONS AFTER PRANAYAMA WERE FOUND IN BOTH ACUTE (2-10 MMHG MEAN SBP REDUCTION, N = 5 STUDIES; 1 MMHG MEAN DBP REDUCTION, N = 1 STUDY) AND CHRONIC STUDIES (4-21 MMHG MEAN SBP REDUCTION, N = 3 STUDIES; 4-7 MMHG MEAN DBP REDUCTION, N = 2 STUDIES). THE PRANAYAMA'S EFFECT ON BP WERE NOT ROBUST AGAINST SELECTION BIAS DUE TO THE LOW QUALITY OF STUDIES. BUT, THE LOWERING BP EFFECT OF PRANAYAMA IS ENCOURAGING. THE PRANAYAMA WITH SLOWER RHYTHMS AND MANIPULATION OF THE NOSTRILS, MAINLY WITH BREATHS BY THE LEFT, PRESENT BETTER RESULTS WHEN COMPARED WITH THE OTHER TYPES AND SHOULD BE THE MAIN PRANAYAMA APPLIED WHEN THE GOAL IS TO REDUCE BLOOD PRESSURE ESPECIALLY IN HYPERTENSIVE PATIENTS. 2017
18 1136 54 EFFICACY OF YOGA ON PREGNANCY OUTCOME. OBJECTIVE: TO STUDY THE EFFICACY OF YOGA ON PREGNANCY OUTCOMES. DESIGN AND SETTING: THREE HUNDRED THIRTY FIVE (335) WOMEN ATTENDING THE ANTENATAL CLINIC AT GUNASHEELA SURGICAL AND MATERNITY HOSPITAL IN BANGALORE, INDIA, WERE ENROLLED BETWEEN 18 AND 20 WEEKS OF PREGNANCY IN A PROSPECTIVE, MATCHED, OBSERVATIONAL STUDY; 169 WOMEN IN THE YOGA GROUP AND 166 WOMEN IN THE CONTROL GROUP. METHODS: WOMEN WERE MATCHED FOR AGE, PARITY, BODY WEIGHT, AND DOPPLER VELOCIMETRY SCORES OF UMBILICAL AND UTERINE ARTERIES. YOGA PRACTICES, INCLUDING PHYSICAL POSTURES, BREATHING, AND MEDITATION WERE PRACTICED BY THE YOGA GROUP ONE HOUR DAILY, FROM THE DATE OF ENTRY INTO THE STUDY UNTIL DELIVERY. THE CONTROL GROUP WALKED 30 MINUTES TWICE A DAY (STANDARD OBSTETRIC ADVICE) DURING THE STUDY PERIOD. COMPLIANCE IN BOTH GROUPS WAS ENSURED BY FREQUENT TELEPHONE CALLS AND STRICT MAINTENANCE OF AN ACTIVITY DIARY. MAIN OUTCOMES: BIRTH WEIGHT AND GESTATIONAL AGE AT DELIVERY WERE PRIMARY OUTCOMES. RESULTS: THE NUMBER OF BABIES WITH BIRTH WEIGHT > OR = 2500 GRAMS WAS SIGNIFICANTLY HIGHER (P < 0.01) IN THE YOGA GROUP. PRETERM LABOR WAS SIGNIFICANTLY LOWER (P < 0.0006) IN THE YOGA GROUP. COMPLICATIONS SUCH AS ISOLATED INTRAUTERINE GROWTH RETARDATION (IUGR) (P < 0.003) AND PREGNANCY-INDUCED HYPERTENSION (PIH) WITH ASSOCIATED IUGR (P < 0.025) WERE ALSO SIGNIFICANTLY LOWER IN THE YOGA GROUP. THERE WERE NO SIGNIFICANT ADVERSE EFFECTS NOTED IN THE YOGA GROUP. CONCLUSIONS: AN INTEGRATED APPROACH TO YOGA DURING PREGNANCY IS SAFE. IT IMPROVES BIRTH WEIGHT, DECREASES PRETERM LABOR, AND DECREASES IUGR EITHER IN ISOLATION OR ASSOCIATED WITH PIH, WITH NO INCREASED COMPLICATIONS. 2005
19 2065 46 THE CARDIOVASCULAR VARIABILITY DURING TRANSIENT 6 DEGREES HEAD DOWN TILT AND SLOW BREATHING IN YOGA EXPERIENCED HEALTHY INDIVIDUALS. OBJECTIVE: THE INTERVENTION OF YOGA HAS BEEN SHOWN TO IMPROVE AUTONOMIC CONDITIONING IN HUMANS AND BETTER ADAPTABILITY TO ORTHOSTATIC CHALLENGES. SIMILARLY, SLOW BREATHING AT 0.1 HZ AKIN TO PRANAYAMA ALSO INCREASES BAROREFLEX SENSITIVITY (BRS). HENCE, WE INTENDED TO INVESTIGATE WHETHER YOGA PRACTITIONERS HAVE DIFFERENT AUTONOMIC RESPONSES AT REST,DURING SLOW DEEP BREATHINGAS WELL AS DURING 6 DEGREES HEAD DOWN TILT (HDT) COMPARED TO NAIVE GROUP INDIVIDUALS. AIM: THE AIM OF THE STUDY WAS TO EVALUATE THE ACUTE EFFECTS OF SLOW BREATHING ON CARDIOVASCULAR VARIABILITY DURING HDT IN YOGA PRACTITIONERS COMPARED TO YOGA-NAIVE INDIVIDUALS. SETTINGS AND DESIGN: THIS WAS A COMPARATIVE STUDY WITH REPEATED MEASURES DESIGN CONDUCTED IN AUTONOMIC FUNCTION TEST LAB OF THE DEPARTMENT OF PHYSIOLOGY, ALL INDIA INSTITUTE OF MEDICAL SCIENCES, NEW DELHI, INDIA. MATERIALS AND METHODS: TIME DOMAIN AND FREQUENCY DOMAIN PARAMETERS OF HEART RATE VARIABILITY, BLOOD PRESSURE VARIABILITY (BPV), AND BRS WERE EVALUATED DURING 6 DEGREES HDT AND SLOW BREATHING AT 0.1 HZ ON FORTY YOGA-NAIVE INDIVIDUALS AND FORTY YOGA PRACTITIONERS WITH AN AVERAGE AGE OF 31.08 +/- 7.31 YEARS AND 29.93 +/- 7.57 YEARS, RESPECTIVELY. ALL OF THE PARTICIPANTS WERE HEALTHY. STATISTICAL ANALYSIS USED: GENERAL LINEAR MIXED MODEL ANOVA WAS APPLIED WITH YOGA EXPERIENCE AS A BETWEEN-GROUP FACTOR IN REPEATED MEASURES. INDEPENDENT SAMPLE T-TEST WAS APPLIED FOR BETWEEN GROUP COMPARISON OF RESPIRATORY RATE, DEMOGRAPHIC, AND ANTHROPOMETRIC DATA. P <0.05 IS CONSIDERED STATISTICALLY SIGNIFICANT. RESULTS: BETWEEN-GROUP COMPARISON DURING HDT WITH SPONTANEOUS BREATHING HAS SHOWN A SIGNIFICANTLY LOWER HEART RATE (P = 0.004) WITH HIGHER RR INTERVAL (RRI) (P = 0.002) AND PNN50% (P = 0.019) IN YOGA PRACTITIONERS. THE SEQUENCE BRS (P < 0.0001) AND ALPHA LOW FREQUENCY (LF) OF SPECTRAL BRS (P = 0.035) WERE ALSO SIGNIFICANTLY HIGHER IN THE YOGA GROUP COMPARED TO THE NAIVE GROUP. SIMILARLY, DURING HDT WITH SLOW BREATHING, THE HEART RATE WAS LOWER (P = 0.01); WITH HIGHER RRI (P = 0.009); PNN50% (P = 0.048). STANDARD DEVIATION OF SUCCESSIVE RR INTERVAL DIFFERENCE OF SYSTOLIC BPV WAS LOWER (P = 0.024) WITH HIGHER SEQUENCE BRS (P = 0.001) AND ALPHA LF OF SPECTRAL BRS (P = 0.002) IN YOGA GROUP THAN NAIVE GROUP. CONCLUSION: THE YOGA EXPERIENCED INDIVIDUALS EXHIBIT HIGHER RESTING PARASYMPATHETIC ACTIVITY, LOWER SYSTOLIC BPV, AND HIGHER BRS THAN NAIVE TO YOGA INDIVIDUALS. IT IS INFERRED FROM THE FINDINGS THAT YOGA PRACTITIONERS WERE BETTER ADAPTED TO TRANSIENT CEPHALAD FLUID SHIFT THAT HAPPENS DURING 6 DEGREES HDT. FURTHERMORE, ACUTE SLOW BREATHING DURING 6 DEGREES HDT REDUCED THE SYSTOLIC BLOOD PRESSURE IN ALL THE PARTICIPANTS SUGGESTING THE BENEFICIAL ROLE OF SLOW BREATHING DURING EXPOSURE TO EXTREME CONDITIONS SUCH AS MICROGRAVITY WHICH MIGHT HELP IN THE PREVENTION OF ADVERSE EFFECTS OF CEPHALAD FLUID SHIFT DURING LONG-TERM WEIGHTLESSNESS AND MAINTAIN THE ASTRONAUT HEALTH. FUTURE MECHANISTIC STUDIES WITH ACTIVE YOGA INTERVENTION ARE NECESSARY TO UNDERSTAND THE ADAPTIVE MECHANISMS INVOLVING CENTRAL AND VASCULAR MODULATIONS CONTRIBUTING TO EITHER ATTENUATION OR ACCENTUATION OF THE CARDIOVAGAL BAROREFLEX DURING HDT AND SLOW BREATHING IN HEALTHY INDIVIDUALS. 2021
20 166 46 A RANDOMIZED CONTROL TRIAL TO STUDY THE EFFECT OF INTEGRATED YOGA ON PREGNANCY OUTCOME IN HYPERTENSIVE DISORDER OF PREGNANCY. OBJECTIVE: THE STUDY AIMED TO EVALUATE THE EFFECTS OF INTEGRATED YOGA ON BLOOD PRESSURE AND PREGNANCY OUTCOME IN HYPERTENSIVE DISORDER OF PREGNANCY. METHODS: SEVENTY-NINE PATIENTS WERE RANDOMIZED INTO STUDY AND CONTROL GROUPS. THE STUDY GROUP RECEIVED THE INTERVENTION IN THE FORM OF INTEGRATED YOGA FOR 4 WEEKS. FINAL ANALYSIS WAS DONE ON 30 PATIENTS EACH OF STUDY AND CONTROL GROUP. RESULTS: THE MEAN SYSTOLIC BP DECLINED BY 7.43 +/- 5.86 MMHG IN THE STUDY GROUP AS COMPARED TO 2.50 +/- 5.21 MM HG IN THE CONTROL GROUP (P VALUE 0.002). THE MEAN DIASTOLIC BP PRIOR TO DELIVERY WAS 88.00 +/- 3.71 MMHG IN THE STUDY GROUP AND 92.20 +/- 5.02 MMHG IN THE CONTROL GROUP (P = 0.001). THE MATERNAL COMFORT IN LABOR WAS SIGNIFICANTLY HIGHER AND THE DURATION OF LABOR SIGNIFICANTLY REDUCED IN THE STUDY GROUP. CONCLUSION: INTEGRATED YOGA EFFECTIVELY REDUCED SYSTOLIC AND DIASTOLIC BLOOD PRESSURES AND INCREASED MATERNAL COMFORT DURING LABOR IN HYPERTENSIVE DISORDER OF PREGNANCY. 2021