YOU MIGHT THINK back to your childhood gym class and remember learning the basics of physical fitness, setting a foundation for the grown-up workouts you continue to do today. While you likely keep ...

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Look, I’m gonna be straight with you – those online calculators that tell you exactly how many jumping jacks you need to burn 500 calories? They’re basically making educated guesses about your body.

One of the quickest ways to get your heart pumping is to simply start jumping up and down! Throw in a little overhead arm movement, and the blood is sure to be flowing. Sounds a lot like a jumping ...

Planks and jumping jacks are perfectly fine workout moves. But if you combine the two together, you can actually get an even better total-body workout. Meet: the plank jack! Plank jacks involve ...

WASHINGTON - First lady Michelle Obama tried Tuesday to help set a world record for the most people doing jumping jacks in a 24-hour period. An overcast sky and light drizzle didn't stop Obama from ...