bottom of the motion the squatter will sit down on a bench or other type of support then rise again. The box squat is commonly utilized by powerlifters to train the squat. Front squat – the barbell is held in front of the body across the clavicles and deltoids in either a clean grip, as is used in weightlifting, or with the arms crossed and hands placed on top of the barbell. In addition to the muscles used in the back squat, the front squat also uses muscles of the upper back such as the trapezius to support the bar. Hack squat – the barbell is held in the hands just behind the legs; this exercise was first known as Hacke (heel) in Germany. According to European strength sports expert and Germanist Emmanuel Legeard this name was derived from the original form of the exercise where the heels were joined. The hack squat was thus a squat performed the way Prussian soldiers used to click their heels ("Hacken zusammen"). The hack squat was popularized in the English-speaking countries by early 1900s wrestler, George Hackenschmidt. It is also called a rear deadlift. It is different from the hack squat performed with the use of a squat machine. Overhead squat – the barbell is held overhead in a wide-arm snatch grip; however, it is also possible to use a closer grip if balance allows. Zercher squat – the barbell is held in the crooks of the arms, on the inside of the elbow. One method of performing this is to deadlift the barbell, hold it against the thighs, squat into the lower portion of the squat, and then hold the bar on the thighs as you position the crook of your arm under the bar and then stand up. This sequence is reversed once the desired number of repetitions has been performed. Named after Ed Zercher, a 1930s strongman. Deep knee bend on toes – it is similar to a normal back squat only the lifter is positioned on their forefeet and toes, with their heels raised, throughout the repetition. Usually, the weight used is not more than moderate in comparison to a flat footed, heavy back squat. Single leg squat - The single leg squat (SLS), also known as a unilateral squat, involves squatting with one leg instead of two (which is a bilateral squat). Usually the leg which is held