Complete with a six-pack, C.J. Senter makes his own workout tapes for kids. Oct. 10, 2011— -- C.J. Senter is a 10-year-old kid who has been on a fitness kick for half his life, and he is ...

but there are ways to make real fitness gains alongside your kids. Kelly Bryant, a fitness coach, getting in a few forward bends while holding her 2-year-old son.Credit...Melanie Metz for The New ...