Yoga Relaxation (savasana) decreases cardiac sympathovagal balance in hypertensive patients - Santaella, Danilo F; Lorenzi-Filho, Geraldo; Rodrigues, Marcos R; Tinucci, Tais; Malinauskas, Ana Paula; Mion-Júnior, Décio; Montano, Nicola; Forjaz, C. L. M. (Medical Express Journal, 2014)