HOS-Y061 Leg Press & Hack Slide Hack Squat Leg Press Machine The leg press function of the machine allows users to perform a compound exercise that mimics the motion of a squat. By pushing against a weighted platform with their feet, users are able to work their leg muscles without putting excessive strain on their back and knees. This makes it a great option for individuals who may have limitations or injuries that prevent them from doing traditional squats.