The squat is performed by squatting down with a weight held across the upper back and standing up straight again. This is a compound exercise that also involves the glutes (buttocks) and, to a lesser extent, the hamstrings, calves, and the lower back. Lifting belts are sometimes used to help support the lower back, as are tight-fitting "squat suits" which compress the lower torso.[citation needed] The freeweight squat is one of 'The Big Three' powerlifting exercises, along with the deadlift and the bench press. Equipment Squats can be performed using only the practitioner's body weight. For weighted squats, a barbell is typically used, although the practitioner may instead hold dumbbells, kettlebells, or other weighted objects. Individuals uncomfortable performing freeweight squats may use a Smith machine or hack squat machine. -Wiki-
