Triceps
 

Triceps

Dumbbell Floor Press

While traditionally thought of as a chest exercise, this move also nails the triceps. "It allows for a greater load on the triceps than a press down," says Robins. It's also easier on the elbows.

Do this: Lie on your back on the floor and hold a pair of dumbbells above your chest with your arms straight, knees bent, and feet flat. Lower the weights until your upper arms touch the floor. Do 10 reps