Place at resistance band just above your knee joint. Then place your legs on the platform directly in front of you, with your feet shoulder width apart. Ensuring the safety bar is removed, exhale and press the platform away from you, engaging your quads as you do so. Press it all the way up until your legs are fully extended in front of you. Do not lock out your knees and make sure to resist against the band. Inhaling, slowly lower the platform until your upper and lower legs form a 90-degree angle. Pause for a count of one, and then repeat the movement.