Strengthen more than just your core muscles with the humble-yet-mighty plank.

Planks are a simple, equipment-free exercise that strengthen your core, improve posture, and protect your back ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Planks are a go-to exercise for delivering full-body benefits with zero equipment. “If done correctly, ...

If you’ve ever held a plank, paused at the bottom of a squat or pressed your palms together in front of your chest, you’ve done an isometric exercise. Ta-da! These holds might look simple — after all, ...

Burpees are a popular exercise, but they can put a lot of stress on your joints. You can swap burpees for other lower-impact ...

Add Yahoo as a preferred source to see more of our stories on Google. YOU KNOW THE SAYING: Work smarter, not harder. You may have already incorporated that mentality into your training routine, ...