Did you know the tricep accounts for roughly two-thirds of your upper arm? Jim and Kathy Coover’s personal trainers Jill and Scott Knight join the show to teach you the important functions of this three-headed muscle and discuss the best ways to train it. “If you’re not challenging the muscle, you’re not changing the muscle,” says Jill. All you need to start feeling the burn is a set of dumbbells and a sturdy bench or chair. Now, let’s get started!To learn more, visit IsaBodyChallenge.com.