Stand with feet about shoulder width apart with a plate or similar held in both hands. Rotate and bend the trunk, hips and knees to bring the weight to the outside of one knee. Lift the weight in an arc out and up overhead to the same position at the other knee. The straighter the arms and wider the arc, the more difficult it will be.
 
Purpose
The topside half moon strengthens the trunk in odd positions and motions to help protect it from injury when exposed to unintentional losses of posture or position. The limited range of motion relative to the half moon makes it more accessible for less mobile athletes or those who need to limit the work on the back.
 
Programming
3-4 sets of 5-10 reps to each side at the end of a training session when the back will no longer need to support significant loading is a good prescription.
 
Variations
The motion can be slowed down and paused at each side to make it more difficult. It can be extended into the complete halfmoon in which the weight begins and ends on the floor each rep.