Dumbbell Concentration Curl February 18, 2008 by Cathe Friedrich Lorraine performs a dumbbell concentration curl during today’s rehearsal of STS Meso #1 Categories: Behind The Scenes, Blog, Rehearsals, STSTags: cathe, dumbbell concentration curl, exercise dvds, fitness dvds, rehearsal, STS, weightlifting dvd, workout dvds Leave a Comment Related PostsWorking Out and Gaining Weight? You May Be Overeating the Benefits of Your Exercise PlanJuly 24, 2011Veggie OmeletJanuary 13, 2012The Latest Workout Shoes From RykaMarch 21, 2013