How-to: Sit on a bench or chair, holding a light dumbbell in each hand.
How-to: Sit on a bench or chair, holding a light dumbbell in each hand. Place your forearms on your thighs, with wrists on top of knees and hands extended beyond knees. Palms can face up or down. Slowly curl the weights up, then lower them. Move only your hands, not your arms. Repeat.