So, when my skipping rope failed yesterday, I defaulted to jumping-jacks - they are crazy tiring so must have a health benefit, right? Of course! Apparently they are a recommended quick cardio exercise :)
Shine has a great article on "correct form" - but if think that you may have perfected your form already in gym at school... progress to more complex jacks (credit goes to Real Beauty):
Traditional Jumping Jack
Start with legs together and knees soft with arms down at your sides. Push off both feet at the same time to open legs up wide into a small squat with your arms above your head. Always make sure you land toe to heel to help protect your feet, knees, and everything on up. Repeat for 30 to 60 seconds.
Single Jack
Alternate traditional jumping jacks with ones where you hop on one leg (like you're playing hop scotch). Keep the same arm movements as a regular jumping jack. Repeat for 30 to 60 seconds.
Jack Turn
Alternate traditional jumping jacks with a jump that turns your body 90 degrees, alternating to the right and then left side. Repeat for 30 to 45 seconds.
Jack & Tuck
Alternate traditional jumping jacks with a tuck jump, bringing your knees to your chest. Repeat for 20 to 30 seconds.
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