Jornal de Yoga e Fisioterapia
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Effects of Breathing Practice in Vinyasa Yoga on Heart Rate Variability in University Students- A Pilot Study

Kimberly Tay and Ann Linda Baldwin

Objective: This pilot study investigated the effects of the breathing practice in vinyasa yoga on heart rate variability (HRV) in university students. High HRV is correlated with decreased anxiety and improved performance. It was hypothesized that after yoga HRV would increase and heart rate (HR) would decrease. Design: Thirteen students were enrolled into a 10-week yoga program and asked to attend at least 3 yoga classes. Before and after each class, the students’ HRV was measured. Respiration rate was measured before and after half of the classes that each student attended. Each participant’s measures were compared pre and post yoga sessions, and statistical differences or trends in the data were evaluated. Setting: The study was performed in the Campus Recreational Center, University of Arizona. Results: For students who attended 3 yoga sessions, HRV was greater after each session than before the session, reaching statistical significance for sessions 1 and 3. Heart rate variability in the low frequency range (LF power) significantly increased after the third session compared to baseline (before first session). Heart rate did not significantly change. Average respiration rate after the last session each student attended was significantly lower than before the session. Conclusion: Students experience increased HRV and decreased respiration rate after yoga sessions, consistent with relaxation and an increased ability to handle stress. Running Head: Vinyasa Yoga and Heart Rate Variability