Squats are arguably the best exercise to develop mass and strength in the legs. But they aren’t nearly as beneficial if you’re only squatting down a few inches and then standing back up. Fortunately, there’s an easy fix for your lousy depth: Box squats. Squatting down to a box — or a bench, or a medicine ball, or whatever other surface you can find — ensures you hit the depth you’re capable of every rep. And since you’re killing your momentum when your butt hits the box, you’re able to build raw power and strength out of the hole at the bottom of the squat. Quick word of warning: It takes a lot of strength to stand a heavy weight off a box from a seated position. When you’re starting out, don’t load as much weight on the bar as you would for a regular free squat.