One Legged Situps with Ball March 31, 2008 by Cathe Friedrich 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 PostsLorraine and StuartMarch 2, 2008What Should You Eat to Balance Your Blood Sugar & Avoid Glucose Spikes? March 1, 2020Announcing Cathe’s Next Video Series – XTRAINJuly 9, 2012