Cathe, Lorraine and Robert March 31, 2008 by Cathe Friedrich Cathe, Lorraine and Robert doing a One Legged Sit-up with Ball during STS Ab Circuits. Categories: Ab Circuits, Behind The Scenes, Blog, STSTags: Ab Circuits, cathe, exercise dvd, fitness dvd, One Legged Sit-up with Ball, STS, workout dvd Leave a Comment Related PostsAll About Hamstring Injuries & How to Prevent ThemAugust 20, 2017Stretching Before Running: Is It Smart?April 10, 2011Split Leg Crunch with WeightsMarch 3, 2008