Curls on a Stability Ball. July 13, 2007 by Cathe Friedrich Cathe and Jai work their biceps on a stability ball using heavy dumbbells in Boot Camp. Categories: 4-Day Split Series, Behind The Scenes, BlogTags: 4 day split, boot camp, cathe, exercise dvd, Higher Intensity Step, kickbox, Lower Intensity Step Leave a Comment Related Posts4 Ways Sugar Is Interfering With Your Weight Loss Goals and Hurting Your HealthFebruary 5, 2012Is Celery Juice an Over-hyped Fad or Does It Have Health Benefits?September 22, 2019Send Your Metabolism Into Overdrive!July 18, 2011