Learn how to do the Seated Crunch and Leg extension in this video. For more info, visit http://kutv.com/video/?cid=22.
Seated Crunch: Muscle Group: Back, Core. Muscle Size: Large. Seated Leg Extension: Muscle Group: Legs. Muscle Size: Large. For more info go to: http://www.checkyourhealth.org/pa/wow.htm. For more workouts go to: http://kutv.com/video/?cid=22