Stand with feet hip-width apart, holding a 5- to 8-pound dumbbell in each hand. (A) Take a large step forward with right leg (about three feet), then bend knee to a 90-degree angle, keeping left leg behind you, heel off the floor. (B) Hold your weight on your right leg, bring left leg out to side so it's in line with right leg, and bend into a squat with both thighs close to parallel to the floor and arms in front of body, as shown. (C) Push off right leg, and place it about three feet behind you, so left leg is forward and bent at 90 degrees. Return to start position. Repeat for 8 to 12 repetions, then switch legs.