Jumping jacks are an effective calisthenic exercise that works the shoulders, back, thighs, and calves while also providing cardiovascular benefits. The exercise involves jumping with the feet apart and arms overhead, then jumping again to bring the feet together and arms down in a continuous repeating motion. Proper form is to keep the knees bent and abdominal muscles engaged throughout the jumping jack movement.

1. How to Do Jumping Jacks Exercise By: Art Olivas WWW.fitnesslikeme.webs.com

2. How to Do Jumping Jacks Calisthenics Exercise Most calisthenic exercises done in school gym classes and boot camps, but that doesn't mean they're outdated. Most, like jumping jacks, are still excellent ways to get into shape. Jumping jacks work your shoulders, back, thighs and calves. They're also good for your heart. The following steps will take you through this exercise.

3. First step Begin by standing with your feet together and arms at your sides. Tighten your abdominal muscles to pull your pelvis forward and take the curve out of your lower back.

4. Second step Bend your knees and jump, moving your feet apart until they are wider than your shoulders. At the same time, raise your arms over your head. You should be on the balls of your feet.

5. Third step Keep your knees bent while you jump again, bringing your feet together and your arms back to your sides. At the end of the movement, your weight should be on your heels.

6. Final step Repeat the exercise, working in sets and resting briefly in between. As you become more fit, perform jumping jacks faster and for a certain length of time rather than in sets.