No Ab Wheel? No Problem!

Via Fight Geek:



The Elephant Walk is a very advanced exercise and will quickly show you weak points in your core, back and legs. If the version demonstrated in the video is too difficult for you, begin in the quadruped position and walk your hands out as far as they will go. Hold this position for time. As your strength increases, increase the distance you walk your hands out. In time, come to standing and begin the process again: walk the hands out a short distance and holding for time. The secret is keeping the core tight, with neutral spine and the arms straight.