Side Lying Crunches on Ball March 31, 2008 by Cathe Friedrich Denise doing Side Lying Crunches on a ball during STS Ab Circuits. Categories: Ab Circuits, Behind The Scenes, Blog, STS Leave a Comment Related PostsPlant-Based Protein: Why You Need More of ItMarch 9, 2014Is Vitamin D from the Sun the Same as Vitamin D from Food?July 5, 2020Great Legs Start With Great CalvesAugust 19, 2012