Some women are born with fantastic legs that seem to go on for miles. For the rest of us, sculpting our lower body can take a bit of effort. But get ready to make heads turn the next time you walk down the street with this no-equipment-necessary workout. It tones everything from the waist down, and if you don't rest between sets, you'll also burn some serious calories.

Runner's Lunges
Take one big step forward with your right foot. The distance between your feet should be about the length of your legs. Raise your left heel, coming up on the toe. Start swinging your arms as if you're running. Now, while swinging your arms, bend both knees to 90 degrees, and straighten back up. Repeat 20 times.

Next, from the same starting position, continue to swing your arms, and take your left knee and bring it up toward your chest. Return your left foot to the starting position (toe touching the floor, knee bent at 90 degrees). Repeat 20 times.

Starting in your original position (split stance, left heel up), bend both knees to 90 degrees and hold for a slow count of 20.

Repeat the entire cycle on the other leg.

Curtsies
Stand straight with your arms out at shoulder height. Place your right toes resting on the floor behind and slightly to the left of your left calf. Make sure your hips are facing forward. Bend both knees in a curtsy and then straighten both legs. Repeat 20 times.

Position yourself as described above, with your right toes behind and to the left of your left calf. Bend both knees in a curtsy, but as you rise up, bring your right knee up and to the side, about hip-height. Sink back into the curtsy, returning the leg to the starting position. Repeat 20 times.