Plant one foot on the floor with the Smith Bar on your shoulders. Come down into squat position on that leg, with your other leg tucked under you, until your thigh is parallel to the floor. Avoid twisting your hips during the movement, and avoid arching or curving your back. When you come up from the squat, only come up part of the way, and drive the pushing energy into the floor through your heel while you squeeze your glute. If you have knee issues, go with a very light weight.