A hi-tech form of resistance training using electrical stimulation to make the muscles work harder. Efficient (1/2 hour workouts), easy on the joints, and results you see and feel pretty quickly. I have been practicing yoga for 4 years and experienced a noticeable increase in my core core strength after 3 sessions (1-1/2 weeks). Colleen is the BEST: profession, enthusiastic, caring and she definitely walks her talk!!!