You may know the back of your upper arm as the part that keeps on waving long after the rest of your arm has stopped. That's because this is an area where many women tend to store excess body fat. While you can't strictly spot reduce (though aerobic exercise will help by reducing overall body fat), you can tone and tighten this area, resulting in smaller, firmer-looking arms.

The upper arm consists of two major muscle groups -- the triceps and the biceps. The triceps run along the back of the arm from the shoulder to the elbow, and the biceps run from the front of the shoulder to the inside of the elbow. The triceps straighten or extend the arm and serve as pushing muscles (think grocery cart), while the biceps flex the arm and work as lifting muscles (think laundry basket).

Feminine, shapely arms that are also strong and functional are well within your reach. The following exercises will help you reshape your upper arms so they appear leaner and more toned. You'll also gain stronger, more resilient muscles that can easily tackle chores like rearranging furniture, washing windows, and even hanging wallpaper. In the meantime, you'll improve your volleyball serve (great for the beach), tennis game, and your chances of becoming mvp of the office softball team.

Gin Miller, creator of step aerobics, is a Reebok Master Trainer. She can be reached on our site or via hers, www.ginmiller.com.