Elementary school gym class was not complete until you raced each other across the cafeteria floor going backwards in the crab position (hands and feet on the floor, stomach facing up). While kids scuttle across the floor like, well, crabs, adults are often amazed at how difficult it is to move with any speed in this manner. Find some open space and give it a try!
Tip: Add triceps dips at the end of each length for even more of a challenge.
