Adding variation to your exercise routine ensures that your muscles don't become adapted, which leads to those frustrating plateaus that can derail your motivation. Whether you're an ace at the standard push-up or just want to try a new version of this tried-and-true exercise, one option is the sphinx push-up. When you begin this exercise your forearms are resting on the floor -- making you look like one of the famous creatures that guard the pyramids of Giza.
Lie on the floor, face down.
Rest your forearms on the floor with your palms facing downward. Curl your toes under, brace your abdominals and lift your body into the plank position. In this position, the majority of your weight will rest on your forearms.
Straighten your arms to lift your body into the full "up" position of a standard push-up. Keeping your core tight will really help, advises "Shape" magazine.
Lower your body back down to the starting position, with your forearms resting on the floor. Repeat the exercise as many times as you can. Ideally, do at least 10 to 20 repetitions.