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 PostsCan Drinking Coffee Boost Your Metabolism?February 11, 2018Cathe’s October 2018 Workout RotationOctober 1, 2018Push-Ups: Are They Good or Bad for Your Back?February 27, 2022
