I'm doing a rear extension with cable around my ankle from a machine. My weider poster shows standing straight for this with one hand on the wall for balance. A recent Oxygen magazine advises leaning forward onto the frame of the weight machine and doing this at an angle. It seemed to work it alot more this way, but which is right? Or is it optional? I suppose you get a higher/larger lift when you lean forward, working the glutes more. Is it just personal preference?