Side Plank March 30, 2008 by Cathe Friedrich Cathe, Lorraine and Robert doing a Side Plank during STS Ab Circuits. Categories: Ab Circuits, Behind The Scenes, Blog, STSTags: Ab Circuits, cathe, exercise dvd, fitness dvd, Side Plank, STS, workout dvd Leave a Comment Related PostsCathe’s May 2017 Workout RotationMay 1, 2017Pre-Sale Prices End August 6thAugust 3, 20135 Reasons Why Your Workout Isn’t WorkingNovember 27, 2011