1. If your ankle or calf hurts, reduce the weight. 2. The handle is there to be held (pull the handle when bending your knees to prevent your back from lifting). 3. The support should not go past the front thigh, no bending of the knee. 4. The knee should bend backward; adjust the weight so it doesn't excessively bend forward. 5. If your buttocks lift even after understanding point 2, reduce the weight. 6. It's better as a supplementary exercise than a main exercise. 7. Even if you lower the weight, if symptoms like in point 1 occur, do not use incline running (equipment).