Cathe doing a Concentration Dumbbell Curl. February 4, 2008 by Cathe Friedrich Cathe performs a concentration curl during an STS rehearsal earlier this week. Categories: Behind The Scenes, Blog, Rehearsals, STSTags: cathe, concentration curl, exercise dvds, fitness dvds, rehearsal, STS, weightlifting dvd, workout dvds Leave a Comment Related PostsHigh-Intensity Strength Training: Is It Better Than Pilates for Building Bone Mass?March 13, 2022Calorie Burn vs. Body Composition: Shifting the Focus for Long-Term FitnessJune 18, 20237 Mistakes You Make When You Wake Up That Tire You Out Before LunchAugust 22, 2021