Dumbbell Concentration Curls. July 13, 2007 by Cathe Friedrich Cathe, Brenda and Lorraine working their biceps in Boot Camp by doing dumbbell concentration curls. Categories: 4-Day Split Series, Behind The Scenes, BlogTags: 4 day split, boot camp, cathe, dumbbell concentration curls, fitness dvds, Higher Intensity Step, kickbox, Lower Intensity Step Leave a Comment Related PostsWeighted Arm and Leg CrunchesApril 1, 2008How Much Exercise Do You Need to Avoid Weight Gain as You Age? What Science SaysApril 11, 2021Susan G. Komen Special Edition StepSeptember 22, 2007
