From Sony's website:
EyeToy: Kinetic™ is an innovative fitness product that provides players with an authentic personalized exercise program all in the comfort of their own home Utilizing the revolutionary EyeToy® USB Camera technology and developed in association with Nike Motionworks (experts in fitness, motion and body movement) players will experience a more effective workout inspired by activities such as Tai Chi, Kick Boxing, Aerobics, Yoga, Modern Dance and more.
Two unique personal trainers provide direction, real-time performance evaluations and encouragement as players of all fitness levels engage in a comprehensive 12-week training routine or select individual routines to shape and tone specific areas. Wrapped in modern styling and supplemented with an energetic soundtrack, EyeToy: Kinetic is a fun and immersive fitness product like no other.