Don't be intimidated by the box jump! It may look scary, but once you try it, you'll feel so badass that you'll start to love them! It's a great exercise to tone your legs, butt, and core, and because ...

Rosa Duarte from CrossFit Advanced in Easton, Pennsylvania, teaches you the proper way to perform the box jump, which will help give you an explosive boost to your running. We may earn commission from ...

You might ask: what's the purpose of this total-body workout? The answer, at least from a CrossFit point of view, is to have you breathing heavily for 20 minutes straight, target every part of your ...

Add Yahoo as a preferred source to see more of our stories on Google. Most gyms have plyometric boxes. They're also found in parks with public workout areas. Photo: Getty Images Building body strength ...

Prepare to be awed...and maybe a little humbled. We're loving the grit, determination and prowess of 4-year-old Prisais Brooklyn Marie of Moorpark California. This pint-sized gymnast has her own ...