keeping the lower back flat Click PLAY or watch it on YouTube. Jason credits Dave Tilley for this drill. Share this: Share on X (Opens in new window) X Share on Facebook (Opens in new window) Facebook Share on Tumblr (Opens in new window) Tumblr Email a link to a friend (Opens in new window) Email Print (Opens in new window) Print Like Loading... Published by Rick Mc Career gymnastics coach who loves the outdoors, and the internet. View all posts by Rick Mc