Find out how to do jumping jacks . Learn what muscles are used, the health benefits of jumping jacks , and tips about mistakes to avoid. While no grade school PE class would be complete without at least one set of jumping jacks , when was the last time you actually did them? If you haven’t thought about them since, say, you ... Jumping jacks are a plyometric exercise that works your heart, lungs, and muscles. Learn how to do them, what benefits and risks they have, and how to modify them for pregnancy and low-impact options. Jumping jacks boost cardio, burn fat, and work legs, core, and upper body. Learn benefits, form tips, and variations for all fitness levels.
