Add Yahoo as a preferred source to see more of our stories on Google. Box jumps are a staple of CrossFit and group fitness classes, but is the up-and-down exercise really worth all the effort? “The ...

If you’re not one to shy away from a challenge — and a little fun — in your workouts, get ready to jump around! Box jumps are perfect for seasoned exercisers looking for a challenge. If you’re a ...