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 PostsDiet May Be More Important for Losing Weight, but You Need Exercise to Maintain It!April 7, 2019Is Being Physically Active Enough or Do You Need Structured Exercise as Well?December 17, 2016Cathe’s Sept 2014 Workout RotationSeptember 2, 2014