Lie on your back with your knees bent and your feet flat on the floor.
Place an upside down cup on one knee or ask someone to do this for you.
Rest both arms on your thighs, or on your stomach if you cannot reach that far.
Flatten the small of your back against the floor, and tuck your chin in.
Reach for the cup, lifting it up and placing it on the other leg.
Keep you chin tucked in as you lie back down.
Rest and then repeat.