Start: Grab a pair of dumbbells and lie on a bench. With a neutral, shoulder-width grip and straight arms, hold the dumbbells up over your forehead.
Finish: Bend at the elbows as you lower the weights down to the sides of your forehead. Keep your upper arms in the same position, and pause when your elbows are bent just past 90 degrees. Return to the starting position.
Start with an overhand grip Rotate your arms inward as you lower the, so your palms face the sides of your head at the bottom position. The rotate them back outward as you return to the starting position.