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 PostsWhat is Metabolic Flexibility?November 20, 2016Is Too Much Vitamin C Harmful to Your Health?October 18, 2020Do You Do One of These 9 Things That Destroys Sleep Quality?January 29, 2023