This one was a variation on the pull up - modified because our client Willo is so freaken strong!! Even so, a simple piece of beach furniture was enough to wear him out.
Simply hook your legs around the top, weave your fingers together, and pull up. Alternate sides or repeat the same side, then swap on the next set.
Remember: train smart!! What are you doing, and why? Exercise should be effective, efficient, and enhance your life.