Criss-cross applesauce is the least of your worries when you’re clinging to a half-inch rock ledge with a single, chalked-up pinkie. That’s a special form of torture and only slightly less ...

Prisoner squat. Bend at the hips and knees to lower your body until your thighs are parallel to the floor, then simply push back up to the starting position and repeat. Criss cross. Start by lying ...