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 We Can Learn about Longevity from the Blue ZonesApril 30, 2017How Your Hand and Feet Position Affects the Benefits You Get from Push-UpsJune 14, 2015Can Stress “Undo” the Benefits of Eating Healthy?September 25, 2016