Set a barbell at knee level in a Squat rack. Assume an athletic stance- your hips back, knees slightly bent and against the bar, lower back naturally arched. Now grab the bar overhand with your hands just outside your legs. Stand up by pushing your hips forward. Begin with no weight until the exercise feels natural, and then start adding weight. Once the exercise becomes easy from the rack, lift the barbell from the floor using the same form.