"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." YOU MIGHT THINK back to your childhood gym class and remember learning the basics of physical fitness, ...

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.

Real talk: The thought of doing jumping jacks may be only slightly more enticing than burpees. It may bring back memories of pre-dodgeball warm-ups back when dodgeball was part of gym class. Yet, ...

At 55, 30–40 smooth jumping jacks without stopping—and passing the talk test—signals above-average cardiovascular fitness.

Old Forge resident and OFHS grad Brandon Gatto sets the Guinness World Record for most jumping jacks in a minute at Old Forge Veterans Memorial Stadium last Monday night. photo by rick notari Last ...

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 ...