When Kristin Cavallari says she’s never looked or felt better, you pay attention. The secret behind her transformation? Nashville-based trainer Kevin Klug, who’s revolutionizing fitness with his elite ...

Reach a 60-inch vertical! Train like a pro with plyometric exercises and weightlifting. Improve your dunking performance, jump higher, and run faster with this workout.

From preventing serious falls to being able to walk up stairs, it’s power – or how you use your strength – that will bring ...