The 90-90 leg extension is a core training exercise that involves starting in a 90-90, or tabletop, position and extending the legs out. Learn how to do 90-90 extensions 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
A-ONE, its done! A-THREE, it's free!
bilderbesoffen 3 years ago