| Titel: | Hatha Yoga Practices: Energy Expenditure, Respiratory Changes and Intensity of Exercise |
|---|---|
| Autor: | Ray, U. S. Pathak, A. Tomer, O. S. |
| Mediengruppe: | journal article |
| Herausgeber: | --- |
| Zeitschrift: | Evidence-Based Complementary and Alternative Medicine |
| Jahr: | 2011 |
| Band: | --- |
| Heft: | --- |
| Seiten: | 1-12 |
| Sprache: | English |
| Abstract: | The aim of this study was to critically observe the energy expenditure, exercise intensity and respiratory changes during a full yoga practice session. Oxygen consumption ((V) over dotO(2)), carbon dioxide output ((V) over dotCO(2)), pulmonary ventilation ((V) over dotE), respiratory rate (Fr) and tidal volume (VT), were measured in 16 physical posture (asanas), five yoga breathing maneuvers (BM) and two types of meditation. Twenty male (age 27.3 +/- 3.5 years, height 166.6 +/- 5.4 cm and body weight 58.8 +/- 9.6 kg) yoga instructors were studied. Their maximal oxygen consumption ((V) over dotO(2max)) was recorded. The exercise intensity in asanas was expressed in percentage (V) over dotO(2max). In asanas, exercise intensity varied from 9.9 to 26.5% of (V) over dotO(2max). Highest energy cost was 3.02 kcal min(-1). In BM highest V. E was 53.7 +/- 15.5 l min(-1). VT was 0.97 +/- 0.59, 1.41 +/- 1.27 and 1.28 +/- l/breath with corresponding Fr of 14.0 +/- 5.3, 10.0 +/- 6.35, 10.0 +/- 5.8 breaths/min. Average energy expenditure in asanas, BM and meditation were 2.29, 1.91 and 1.37 kcal min(-1), respectively. Metabolic rate was generally in the range of 1-2 metabolic equivalents (MET) except in three asanas where it was > 2MET. (V) over dotO(2) 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. |