Doing diagonal sit ups in the 90-90, or tabletop, position can help to strengthen core muscles such as the obliques. Learn how to do 90-90 diagonal sit ups 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
جيد
thisismyytname 2 years ago
なるほど!
学びました!!
k3z6963 2 years ago