Source: Roy Johnson / Fit! Live! Win! I love trying new exercise moves. No matter how exited I am about my workouts moves get old. Even adding more weight or reps doesn't always keep a move from getting stale. But there's one old-school move that'll never get old: the push up. It's genius in its simplicity–both in name and execution. It may also be the most effective old-school move in the gym. It builds your chest, arms and shoulders, obviously. But [...]