Doing prone single leg lifts on an exercise ball, or physioball, will help you strengthen and stabilize the core muscles of your body. Learn how to do this great core exercise in this free core training workout video.
Expert: Kirk Vickers
Bio: Kirk Vickers is the owner of TRIAD Performance Gym and Training Center. He was twice voted as one of Americas Top 100 Trainers by Mens Journal Magazine.
Filmmaker: Travis Waack
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