Stand side-on to a cable set at chest height, feet about shoulder-width apart, holding the handle with both hands against your chest. Press it straight out in front of you and hold, resisting the cable's pull that wants to rotate your torso toward the machine. Your hips and shoulders should stay square to the front the entire time -- if you feel yourself twisting, you've either pressed out too fast or the load is too heavy for your current control. Bring the handle back to your chest under control rather than letting the cable yank it, then repeat before turning around to face the other direction and load the opposite side.