At Iris Retreat, yoga is incorporated into the holistic program to heal not only your mind and spirit, but your body as well. Yoga therapy for addiction simulates the relaxing effects of the parasympathetic nervous system and removes tension from all the major muscle groups and with certain postures actually massage internal organs, helping dispel toxins that may have built up in the liver and kidneys from substance abuse. Those who practiced yoga for 75 minutes once a week and received individual therapy once a week reduced their drug use, criminal activity, and cravings as much as those who went to group therapy once a week and had individual counseling.