As a teen, losing belly fat can be fun, especially if you have a workout buddy that can keep you motivated. Discover how to lose your belly fat withtips from a certified personal fitness trainer in this free video on losing fat and building muscle for teens. Expert: Tanya Batts Bio: Tanya Batts has been a certified personal fitness trainer for more than 11 years. Filmmaker: Reel Media LLC Series Description: Losing fat and building muscle can be achieved with a variety of exercises and programs. Get in great shape with tips from a certified personal fitness trainer in this free video on losing fat and building muscle.