Single Bout of Yoga Practices (Asana) Effect on Low Frequency (LF) of Heart Rate Variability – A Pilot Study

The Heart Rate Variability (HRV) is an important parameter to assess psychophysiological changes associated with Autonomic Nervous System (ANS). The present study aimed to assess the effect of single bout yoga postures practice on parasympathetic nervous system activity of ANS. Three male subjects having more than 5 years of experience in yoga postures were selected in the current study. These participants were assessed for HRV immediately before and after practice of specific yoga postures practiced for 15 min, 21 min and 27 min on three different days. The yoga practices were selected from hatha yogic texts that may influence brain blood flow resulting autonomic activities.