Adjust safety pin and back pad based on leg length. Load weight. Sit down and place legs at a low & close stance. Push legs forward driving through heels to unlock safety handles.
Lower the weight until your thighs are perpendicular to your chest. Ensure knees don't go past toes. Driving through your heels and raise weight to start position.
Repeat this range of motion until all reps are completed.
Lock safety handles. Exit machine.