The hack squat is a compound exercise that mainly strengthens the quadriceps, hamstrings, and glutes. It is a powerful compound exercise that works the lower back and core muscles as well. typically, an altered machine that simulates a squat’s motion while supporting the neck and back is used for doing the hack squat. Unlike the back squat, the hack squat allows you to squat with a barbell without putting load on your spine. Here’s how to do hack squats with a barbell, plus a couple of helpful variations and... Learn how to do hack squats, a squat variation that uses a machine or a Smith Machine to target your quads and glutes. Find out the pros and cons, the muscles worked, and the best foot positions for this exercise. Learn how to do a hack squat with a machine or a barbell to build strength in your quads and glutes. Find out the differences, common mistakes, and alternatives to this lower body exercise.