The reverse hyper is one of the best pieces of equipment around for strengthening the posterior chain: the hamstrings, glutes and lower back.

Westside's Louie Simmons invented it, so you'll see it a lot in hardcore powerlifting gyms. And today many CrossFit boxes are adding them. There are several ways to use the machine – unilaterally, bilaterally, swinging or strict – but in the video here we'll just go over the basic function.

Related:  More Reverse Hyper Variations

Related:  The Best Damn Posterior Chain Exercises