The Badass Crawl exercise works your shoulders, chest, arms and abs.
For this move, start in plank position at the back of your mat. Turn your hands up slightly to take pressure off the wrist. Walk forward on your hands. Keep the belly super engaged, back on the forearms. Forward on the hands, engage the quads, back on the forearms. Do this for 1 minute. The faster you go, the more challenging it is.