Figure 1.

General make up of time period in which participants were monitored. On the first day all participated in a mantra meditation session lasting 26 min, after which they remained in place, listening to speakers for another 20 min, followed by a 4 min guided deep breathing exercise (pranayama), after which monitoring was complete. For the breathing exercise individuals were guided through cycles of inhalation for 4 s, hold for 4 s, and then exhale for 4 s via alternating nostrils. The final monitoring session was similar to the first with the meditation session lasting 24 min, followed by 10 min of quietly sitting and listening to speakers and then 4 min of guided breathing.