Today we put S to the test after I accused her of slacking on progressive overload and just “chatting” at the gym with her ...

It's easy to focus on biceps and triceps exercises during my upper-body workout. Sometimes I even throw in some back moves. But my go-to arm routine was missing a major muscle group: rear deltoids.

Building your delts can be challenging, but Jared Feather of Renaissance Periodization shared a simple technique to help you grow this tough-to-develop muscle: train it at the beginning of your ...