Get onto your hands and knees with your partner standing behind you. Your hands should be aligned under shoulders. Lift one foot, then the other, off the floor as your partner grasps your ankles, with your feet on either side of his legs. Your legs should be straight and your abs tight to protect your back from arching downward.
“Walk” slowly forward with your hands as your partner walks behind you, holding your legs. If much taller than you, your partner can walk with his legs slightly bent.
Continue for 30 seconds; switch positions with your partner. (No repetitions required.)