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 PostsCycle Max ClothesAugust 8, 2011Do Iron Supplements Improve Exercise Performance?April 27, 2014Are Plant-Based Diets Better for Blood Sugar Control?March 7, 2021