For a more effective use of the Push-up position; you can vary the position of your hands; this then allows different muscles of the chest and triceps to be used. For example: If you move your hands to a narrow placement-then you are involving more triceps and inner chest. If you go to a wider placement-then more outer chest is being used. Also by elevating your feet greater emphasis can be put on the upper chest. Try it and then come on in and let me know what you think.