This is another quadrupedal movement that mimics the way a cat walks, and gives a full-body workout. On a low ledge or the ground (try to find a seam in the sidewalk), crouch on hands and feet, making sure the hips aren't elevated too high and the knees aren't touching the ground. Move backward and forward in a line, placing weight on arms and legs, keeping the head and neck aligned and always looking just ahead of the hands, which will help maintain balance.
"This gets you used to being horizontal and low to the ground," Kravit says. "It's about developing that center of balance, and [it] gets you used to moving the arms and legs in conjunction with one another."
Strong arm and back muscles are needed for this exercise. Find a wall from which you can hang without touching the ground. Grasp the top of the wall with both hands, and place the balls of the feet against the wall, bending the knees. Shift your body sideways along the wall, moving one hand and foot at the same time, then the other hand and foot. Mastering this move will make wall climbs easier, since it gets the body strong and stable for more advanced work.