Crossing the arms and legs is thought by kinesiologists to rebalance the right and left hemispheres of the brain, harmonizing physical and mental energies and lifting exhaustion. Stand up and circle your right arm forward, as if swimming the front crawl. When the movement seems natural, coordinate it with a lift of your left knee. Bring both limbs high, and cross them into the opposite half of the body. Repeat with the left arm and right leg. Finally, and most importantly, work with alternate arms and legs, as if swimming the front crawl while marching on the spot.