Stand with your feet together and arms at your sides. Jump your feet apart while raising your arms overhead. Return to the starting position and repeat the movement continuously for 40 seconds.

We took the infamous "Bring Sally Up" push-up challenge, made our own custom version, and cranked the difficulty to the max. Instead of surviving the 3-minute-and-23-second torture once, we tried to ...

Designed to wake up your muscles, this five-minute workout elevates your heart rate and get your blood flowing all before ...

But Metzl said that extreme exertion—i.e. burpees—release endorphins, which give us the boost we need to get through our day.