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 ...

Other than burpees, box jumps are probably ~the~ most well-known (and most intimidating!) plyometric exercise you can do. If they give you nightmares of scraped shins, I hear you—but I also guarantee ...