The medicine ball half moon is a dynamic core exercise performed around and over a medicine ball or other short, stationary object. It is similar in some ways to a V-up or reverse crunch, and targets both the obliques and the rectus abdominis or "six-pack" muscles. It can be performed for reps or for time, usually in dedicated ab training or as part of a medicine ball and bodyweight circuit workout.
Hits multiple parts of the abs in a single movement
Powerful isometric contraction as well as dynamic muscle contraction
Can be performed for low reps, high reps, or for time
Can be performed with any object of medicine-ball height