The squat is a very easy movement to mess up. It's a very technical exercise because of the numerous moving components and mobility requirements involved. With that being said, there's a lot of room for injury in the upper and lower back. Today, I want to explain the importance of stabilization.
The most common problem is that when a squatter begins his descent, his hips will glide backward in control and his knees will stay strong. That's perfect, however, once the squatter reaches parallel, he collapses forward and the back rounds, resembling Quasimodo from the Hunchback of Notre Dame.
The problem is simple, descending into the bottom of a squat requires a strong upright posture. A solution is to build strength in the lats and upper-back musculature. The tension built by the lats and the upper-back musculature keeps the spine rigid while squatting. If you lose tension, you bend forward and expose your upper back to injury.