1 1706 98 PATTERN OF BREATHING AND VENTILATORY RESPONSE TO CO2 IN SUBJECTS PRACTICING HATHA-YOGA. WE STUDIED EIGHT BELGIAN SUBJECTS WELL ADVANCED IN THE PRACTICE OF HATHA-YOGA AND COMPARED THEM WITH EIGHT SEX-, AGE-, AND HEIGHT-MATCHED CONTROL SUBJECTS. PRACTICE OF YOGA (RANGE 4-12 YR) INVOLVES CONTROL OF POSTURE AND MANIPULATION OF BREATHING, INCLUDING SLOW NEAR-VITAL CAPACITY MANEUVERS ACCOMPANIED BY APNEA AT END INSPIRATION AND END EXPIRATION. AVERAGE VALUES FOR THE YOGA AND THE CONTROL GROUP (IN PARENTHESES) ARE AS FOLLOWS: VENTILATION (VE) 5.53 1 X MIN-1 (7.07); TIDAL VOLUME (VT), 1.03 LITERS (0.56); RATE OF BREATHING, 5.5 MIN-1 (13.4); END-TIDAL PCO2, 39.0 TORR (35.3). ALL DIFFERENCES ARE SIGNIFICANT (P LESS THAN 0.05). VENTILATORY RESPONSE TO CO2 (REBREATHING TECHNIQUE) WAS SIGNIFICANTLY LOWER IN THE YOGA GROUP (P LESS THAN 0.01). THE REGRESSION RELATING VE TO VT DURING REBREATHING OF CO2 WAS VE = 8.1 (VT - 0.23) FOR THE YOGA GROUP AND VE = 15.8 (VT - 0.16) FOR THE CONTROL GROUP (P LESS THAN 0.005). WE ATTRIBUTE THESE CHANGES TO CHRONIC MANIPULATION OF RESPIRATION. 1981 2 1118 23 EFFICACY OF AN EIGHT-WEEK YOGA INTERVENTION ON SYMPTOMS OF RESTLESS LEGS SYNDROME (RLS): A PILOT STUDY. BACKGROUND: RESTLESS LEGS SYNDROME (RLS) IS A COMMON AND HIGHLY BURDENSOME SLEEP DISORDER. WHILE RELAXATION THERAPIES, INCLUDING YOGA, ARE OFTEN RECOMMENDED FOR RLS MANAGEMENT, RIGOROUS SUPPORTING RESEARCH IS SPARSE. THE GOAL OF THIS PRELIMINARY STUDY WAS TO ASSESS THE EFFECTS OF YOGA ON RLS SYMPTOMS AND RELATED OUTCOMES IN WOMEN WITH RLS. METHODS: PARTICIPANTS WERE 13 NONSMOKING WOMEN WITH MODERATE TO SEVERE RLS, WHO DID NOT HAVE DIABETES, SLEEP APNEA, OR OTHER SERIOUS CONCOMITANT CHRONIC CONDITIONS, AND WHO WERE NOT PREGNANT. THE INTERVENTION WAS A GENTLE, 8-WEEK IYENGAR YOGA PROGRAM. CORE OUTCOMES ASSESSED PRE- AND POST-TREATMENT WERE RLS SYMPTOMS AND SYMPTOM SEVERITY (INTERNATIONAL RLS SCALE [IRLS] AND RLS ORDINAL SCALE), SLEEP QUALITY (MEDICAL OUTCOMES STUDY SLEEP SCALE), MOOD (PROFILE OF MOOD STATES), AND PERCEIVED STRESS (PERCEIVED STRESS SCALE). PARTICIPANTS ALSO COMPLETED YOGA LOGS AND A BRIEF EXIT QUESTIONNAIRE REGARDING THEIR EXPERIENCE WITH THE STUDY. RESULTS: TEN (10) WOMEN, AGED 32-66 YEARS, COMPLETED THE STUDY. PARTICIPANTS ATTENDED AN AVERAGE 13.4+/-0.5 (OF 16 POSSIBLE) CLASSES, AND COMPLETED A MEAN OF 4.1+/-0.3 (OF 5 POSSIBLE) HOMEWORK SESSIONS/WEEK. AT FOLLOW-UP, PARTICIPANTS DEMONSTRATED STRIKING REDUCTIONS IN RLS SYMPTOMS AND SYMPTOM SEVERITY, WITH SYMPTOMS DECREASING TO MINIMAL/MILD IN ALL BUT 1 WOMAN AND NO PARTICIPANT SCORING IN THE SEVERE RANGE BY WEEK 8. EFFECT SIZES (COHEN'S D) WERE LARGE: 1.6 FOR IRLS TOTAL, AND 2.2 FOR RLS ORDINAL SCALE. IRLS SCORES DECLINED SIGNIFICANTLY WITH INCREASING MINUTES OF HOMEWORK PRACTICE PER SESSION (R=0.70, P=0.025) AND TOTAL HOMEWORK MINUTES (R=0.64, P<0.05), SUGGESTING A POSSIBLE DOSE-RESPONSE RELATION. PARTICIPANTS ALSO SHOWED SIGNIFICANT IMPROVEMENTS IN SLEEP, PERCEIVED STRESS, AND MOOD (ALL P'S2 MET. [FORMULA: SEE TEXT] WAS 0.27 +/- 0.05 AND 0.24 +/- 0.04 L MIN(-1) IN MEDITATION AND SHAVASANA, RESPECTIVELY. ALTHOUGH YOGIC PRACTICES ARE LOW INTENSITY EXERCISES WITHIN LACTATE THRESHOLD, PHYSICAL PERFORMANCE IMPROVEMENT IS POSSIBLE OWING TO BOTH BETTER ECONOMY OF BREATHING BY BM AND ALSO BY IMPROVEMENT IN CARDIOVASCULAR RESERVE. OTHER FACTORS SUCH AS PSYCHO-PHYSIOLOGICAL AND BETTER RELAXATION MAY CONTRIBUTE TO IT. 2011 15 751 19 EFFECT OF SHORT TERM YOGA PRACTICE ON VENTILATORY FUNCTION TESTS. TWENTYFIVE NORMAL MALE VOLUNTEERS UNDERGOING A TEN WEEKS COURSE IN THE PRACTICE OF YOGA HAVE BEEN STUDIED BY SOME PARAMETERS OF VENTILATORY FUNCTIONS TESTS. THE OBSERVATIONS RECORDED AT THE END OF TEN WEEKS OF THE COURSE HAVE SHOWN IMPROVED VENTILATORY FUNCTIONS IN THE FORM OF LOWERED RESPIRATORY RATE, INCREASED FORCED VITAL CAPACITY, FEV1, MAXIMUM BREATHING CAPACITY AND BREATH HOLDING TIME, WHILE TIDAL VOLUME AND %FEV1, DID NOT REVEAL ANY SIGNIFICANT CHANGE. THUS, A COMBINED PRACTICE OF YOGA SEEMS TO BE BENEFICIAL ON RESPIRATORY EFFICIENCY. 1988 16 438 25 CARDIOVASCULAR AND RESPIRATORY EFFECT OF YOGIC SLOW BREATHING IN THE YOGA BEGINNER: WHAT IS THE BEST APPROACH? SLOW BREATHING INCREASES CARDIAC-VAGAL BAROREFLEX SENSITIVITY (BRS), IMPROVES OXYGEN SATURATION, LOWERS BLOOD PRESSURE, AND REDUCES ANXIETY. WITHIN THE YOGA TRADITION SLOW BREATHING IS OFTEN PAIRED WITH A CONTRACTION OF THE GLOTTIS MUSCLES. THIS RESISTANCE BREATH "UJJAYI" IS PERFORMED AT VARIOUS RATES AND RATIOS OF INSPIRATION/EXPIRATION. TO TEST WHETHER UJJAYI HAD ADDITIONAL POSITIVE EFFECTS TO SLOW BREATHING, WE COMPARED BRS AND VENTILATORY CONTROL UNDER DIFFERENT BREATHING PATTERNS (EQUAL/UNEQUAL INSPIRATION/EXPIRATION AT 6 BREATH/MIN, WITH/WITHOUT UJJAYI), IN 17 YOGA-NAIVE YOUNG HEALTHY PARTICIPANTS. BRS INCREASED WITH SLOW BREATHING TECHNIQUES WITH OR WITHOUT EXPIRATORY UJJAYI (P < 0.05 OR HIGHER) EXCEPT WITH INSPIRATORY + EXPIRATORY UJJAYI. THE MAXIMAL INCREASE IN BRS AND DECREASE IN BLOOD PRESSURE WERE FOUND IN SLOW BREATHING WITH EQUAL INSPIRATION AND EXPIRATION. THIS CORRESPONDED WITH A SIGNIFICANT IMPROVEMENT IN OXYGEN SATURATION WITHOUT INCREASE IN HEART RATE AND VENTILATION. UJJAYI SHOWED SIMILAR INCREASE IN OXYGEN SATURATION BUT SLIGHTLY LESSER IMPROVEMENT IN BAROREFLEX SENSITIVITY WITH NO CHANGE IN BLOOD PRESSURE. THE SLOW BREATHING WITH EQUAL INSPIRATION AND EXPIRATION SEEMS THE BEST TECHNIQUE FOR IMPROVING BAROREFLEX SENSITIVITY IN YOGA-NAIVE SUBJECTS. THE EFFECTS OF UJJAYI SEEMS DEPENDENT ON INCREASED INTRATHORACIC PRESSURE THAT REQUIRES GREATER EFFORT THAN NORMAL SLOW BREATHING. 2013 17 1508 12 IS MAN ABLE TO BREATHE ONCE A MINUTE FOR AN HOUR?: THE EFFECT OF YOGA RESPIRATION ON BLOOD GASES. THE VENTILATORY RESPONSE TO HYPERCAPNIA AND ARTERIAL BLOOD GASES DURING UJJAI RESPIRATION OF ONCE PER MINUTE FOR AN HOUR WERE DETERMINED IN A PROFESSIONAL HATHA YOGI. THE RESULTS SUGGEST THAT LOWER CHEMOSENSITIVITY TO HYPERCAPNIA IN YOGA PRACTITIONERS MAY BE DUE TO AN ADAPTATION TO LOW ARTERIAL PH AND HIGH PACO2 FOR LONG PERIODS. 2002 18 867 25 EFFECT OF YOGA REGIMEN ON LUNG FUNCTIONS INCLUDING DIFFUSION CAPACITY IN CORONARY ARTERY DISEASE PATIENTS: A RANDOMIZED CONTROLLED STUDY. BACKGROUND: LUNG FUNCTIONS ARE FOUND TO BE IMPAIRED IN CORONARY ARTERY DISEASE (CAD), CONGESTIVE HEART FAILURE, LEFT VENTRICULAR DYSFUNCTION, AND AFTER CARDIAC SURGERY. DIFFUSION CAPACITY PROGRESSIVELY WORSENS AS THE SEVERITY OF CAD INCREASES DUE TO REDUCTION IN LUNG TISSUE PARTICIPATING IN GAS EXCHANGE. AIMS AND OBJECTIVES: PRANAYAMA BREATHING EXERCISES AND YOGIC POSTURES MAY PLAY AN IMPRESSIVE ROLE IN IMPROVING CARDIO-RESPIRATORY EFFICIENCY AND FACILITATING GAS DIFFUSION AT THE ALVEOLO-CAPILLARY MEMBRANE. THIS STUDY WAS DONE TO SEE THE EFFECT OF YOGA REGIMEN ON LUNG FUNCTIONS PARTICULARLY DIFFUSION CAPACITY IN CAD PATIENTS. MATERIALS AND METHODS: A TOTAL OF 80 STABLE CAD PATIENTS BELOW 65 YEARS OF AGE OF BOTH SEXES WERE SELECTED AND RANDOMIZED INTO TWO GROUPS OF 40 EACH. GROUP I CAD PATIENTS WERE GIVEN YOGA REGIMEN FOR 3 MONTHS WHICH CONSISTED OF YOGIC POSTURES, PRANAYAMA BREATHING EXERCISES, DIETARY MODIFICATION, AND HOLISTIC TEACHING ALONG WITH THEIR CONVENTIONAL MEDICINE WHILE GROUP II CAD PATIENTS WERE PUT ONLY ON CONVENTIONAL MEDICINE. LUNG FUNCTIONS INCLUDING DIFFUSION CAPACITY WERE RECORDED THRICE IN BOTH THE GROUPS: 0 DAY AS BASELINE, 22(ND) DAY AND ON 90(TH) DAY BY USING COMPUTERIZED MS MEDISOFT CARDIO-RESPIRATORY INSTRUMENT, HYP'AIR COMPACT MODEL OF CARDIO-RESPIRATORY TESTING MACHINE WAS MANUFACTURED BY P K MORGAN, INDIA. THE RECORDED PARAMETERS WERE STATISTICALLY ANALYZED BY REPEATED MEASURES ANOVA FOLLOWED BY TUKEY'S TEST IN BOTH THE GROUPS. CARDIOVASCULAR PARAMETERS WERE ALSO COMPARED BEFORE AND AFTER INTERVENTION IN BOTH THE GROUPS. RESULTS: STATISTICALLY SIGNIFICANT IMPROVEMENTS WERE SEEN IN SLOW VITAL CAPACITY, FORCED VITAL CAPACITY, PEAK EXPIRATORY FLOW RATE, MAXIMUM VOLUNTARY VENTILATION, AND DIFFUSION FACTOR/ TRANSFER FACTOR OF LUNG FOR CARBON MONOXIDE AFTER 3 MONTHS OF YOGA REGIMEN IN GROUP I. FORCED EXPIRATORY VOLUME IN 1(ST) SEC (FEV1), AND FEV1 % ALSO SHOWED A TREND TOWARD IMPROVEMENT ALTHOUGH NOT STATISTICALLY SIGNIFICANT. HR, SBP AND DBP ALSO SHOWED SIGNIFICANT IMPROVEMENT IN GROUP-I PATIENTS WHO FOLLOWED YOGA REGIMEN. CONCLUSIONS: YOGA REGIMEN WAS FOUND TO IMPROVE LUNG FUNCTIONS AND DIFFUSION CAPACITY IN CAD PATIENTS BESIDES IMPROVING CARDIOVASCULAR FUNCTIONS. THUS, IT CAN BE USED AS A COMPLIMENTARY OR ADJUNCT THERAPY ALONG WITH THE CONVENTIONAL MEDICINE FOR THEIR TREATMENT AND REHABILITATION. 2015 19 1904 25 RETARDATION OF CORONARY ATHEROSCLEROSIS WITH YOGA LIFESTYLE INTERVENTION. BACKGROUND: YOGA HAS POTENTIAL FOR BENEFIT FOR PATIENTS WITH CORONARY ARTERY DISEASE THOUGH OBJECTIVE, ANGIOGRAPHIC STUDIES ARE LACKING. MATERIAL AND METHODS: WE EVALUATED POSSIBLE ROLE OF LIFESTYLE MODIFICATION INCORPORATING YOGA, ON RETARDATION OF CORONARY ATHEROSCLEROTIC DISEASE. IN THIS PROSPECTIVE, RANDOMIZED, CONTROLLED TRIAL, 42 MEN WITH ANGIOGRAPHICALLY PROVEN CORONARY ARTERY DISEASE (CAD) WERE RANDOMIZED TO CONTROL (N = 21) AND YOGA INTERVENTION GROUP (N = 21) AND WERE FOLLOWED FOR ONE YEAR. THE ACTIVE GROUP WAS TREATED WITH A USER-FRIENDLY PROGRAM CONSISTING OF YOGA, CONTROL OF RISK FACTORS, DIET CONTROL AND MODERATE AEROBIC EXERCISE. THE CONTROL GROUP WAS MANAGED BY CONVENTIONAL METHODS I.E. RISK FACTOR CONTROL AND AMERICAN HEART ASSOCIATION STEP I DIET. RESULTS: AT ONE YEAR, THE YOGA GROUPS SHOWED SIGNIFICANT REDUCTION IN NUMBER OF ANGINAL EPISODES PER WEEK, IMPROVED EXERCISE CAPACITY AND DECREASE IN BODY WEIGHT. SERUM TOTAL CHOLESTEROL, LDL CHOLESTEROL AND TRIGLYCERIDE LEVELS ALSO SHOWED GREATER REDUCTIONS AS COMPARED WITH CONTROL GROUP. REVASCULARISATION PROCEDURES (CORONARY ANGIOPLASTY OR BYPASS SURGERY) WERE LESS FREQUENTLY REQUIRED IN THE YOGA GROUP (ONE VERSUS EIGHT PATIENTS; RELATIVE RISK = 5.45; P = 0.01). CORONARY ANGIOGRAPHY REPEATED AT ONE YEAR SHOWED THAT SIGNIFICANTLY MORE LESIONS REGRESSED (20% VERSUS 2%) AND LESS LESIONS PROGRESSED (5% VERSUS 37%) IN THE YOGA GROUP (CHI-SQUARE = 24.9; P < 0.0001). THE COMPLIANCE TO THE TOTAL PROGRAM WAS EXCELLENT AND NO SIDE EFFECTS WERE OBSERVED. CONCLUSION: YOGA LIFESTYLE INTERVENTION RETARDS PROGRESSION AND INCREASES REGRESSION OF CORONARY ATHEROSCLEROSIS IN PATIENTS WITH SEVERE CORONARY ARTERY DISEASE. IT ALSO IMPROVES SYMPTOMATIC STATUS, FUNCTIONAL CLASS AND RISK FACTOR PROFILE. 2000 20 1376 19 IMPACT OF HATHA YOGA ON THE AIRWAY RESISTANCES IN HEALTHY INDIVIDUALS AND ALLERGIC RHINITIS PATIENTS. THERE HAVE BEEN LIMITED STUDIES ON HATHA YOGA TRAINING AS A COMPLEMENTARY THERAPY TO MANAGE THE SYMPTOMS OF ALLERGIC RHINITIS. THE MAIN AIM OF THE STUDY WAS TO CHECK THE IMPACT OF HATHA YOGASANAS ON THE AIRWAY RESISTANCES IN HEALTHY VOLUNTEERS, A BASELINE DATA CAN BE ESTABLISHED AND ALSO TO STUDY THE IMPACT OF HATHA YOGASANAS ON THE AIRWAY RESISTANCES IN ALLERGIC RHINITIS PATIENTS IN BANGALORE, INDIA. THIS IS A PROSPECTIVE CASE SERIES OF 51 HEALTHY VOLUNTEERS (18 MALES AND 33 FEMALES) GROUP 1 AND 51 ALLERGIC RHINITIS PATIENTS (18 MALES AND 33 FEMALES) GROUP 2. THE OBJECTIVE ANALYSIS OF THE UPPER AIRWAY RESISTANCE WAS MEASURED USING A RHINOMANOMETER AND THE LOWER AIRWAY RESISTANCE WAS MEASURED USING A SPIROMETER. THEN THE SUBJECTS PRACTICED SPECIFIC HATHA YOGASANAS FOR THREE MONTHS. THEN THE AIRWAY RESISTANCE TESTS WERE AGAIN DONE AT 3 MONTHS INTERVAL. THE SUBJECTIVE ANALYSIS WAS DONE PRE YOGA AND POST YOGA USING THE SHORT FORM-12 (SF-12) AND SINO NASAL OUTCOME TEST (SNOT) QUESTIONNAIRES TO ASSESS THE QUALITY OF LIFE. THE DATA WAS ANALYZED BY DOING A PAIRED (2-TAILED) T TEST, USING SPSS (SOFTWARE PACKAGE FOR SOCIAL SCIENCES) VERSION 16. TOTAL NASAL AIRWAY RESISTANCE PRE YOGA AND POST YOGA IN 51 HEALTHY VOLUNTEERS HAD SIGNIFICANTLY REDUCED AT 150 PA AND THE FORCED VITAL CAPACITY(FVC) PRE YOGA AND POST YOGA HAD SIGNIFICANTLY INCREASED,FORCED EXPIRATORY VOLUME (FEV1) & % RESIDUAL STANDARD DEVIATION (%RSD) HAD INCREASED BUT NOT SIGNIFICANT. THE PHYSICAL COMPONENT SCORE (PCS) AND MENTAL COMPONENT SCORE (MCS) OF THE SF-12 HEALTH SURVEY QUESTIONNAIRE HAD SIGNIFICANTLY IMPROVED WITH AND THE SNOT QUESTIONNAIRE SCORE HAD SIGNIFICANTLY REDUCED. THE TOTAL NASAL AIRWAY RESISTANCE IN 51 ALLERGIC RHINITIS HAD SIGNIFICANTLY REDUCED AT 150 PA AND THE FVC PRE YOGA AND POST YOGA SHOWED INCREASE BUT CHANGE WAS NOT SIGNIFICANT, FEV1 PRE YOGA AND POST YOGA HAD SIGNIFICANTLY INCREASED, %RSD PRE YOGA AND POST YOGA HAD SIGNIFICANTLY INCREASED. THE PCS AND MCS OF THE SF-12 HEALTH SURVEY QUESTIONNAIRE HAD SIGNIFICANTLY INCREASED AND THE SNOT QUESTIONNAIRE SCORE HAD SIGNIFICANTLY DECREASED. THE SCIENTIFIC DOCUMENTATION OF THE IMPACT OF HATHA YOGA ON THE AIRWAY RESISTANCES CAN BE AN EYE OPENER IN THE MANAGEMENT OF SEVERAL OTHER DISEASES OF THE AIRWAYS. 2019