Give your regular weights a day off. Medicine balls are a fun alternative and if you use one without handles, you have to work a little harder to grip it, which leads to even more toning, says Pete McCall, a personal trainer and exercise physiologist for the American Council on Exercise. Get started with a 4- to 6-pound ball and these simple moves three times a week.
Exercise moves courtesy of the American Council on Exercise
Works: Abs and arms
How to Do It: Sit on the floor with your knees bent, feet together, and heels on the floor while holding a medicine ball close to your body. Keep your back straight and upright. Rotate your torso to one side, keeping the ball close to you. Pause briefly and turn to the other side. Do 2 sets of 8 to 12 reps.