Happy New Year! I'm a little late on posting this, sorry, just been busy. I've made over 50 videos of sledgehammer exercises and I've uploaded most of them to my Youtube channel. The sledgehammer is really a fun tool to exercise with. It is a great workout and the time passes quickly while you are having fun swinging the sledgehammer.
Here's the overhead wood chopping exercise. Be sure to check out all of the sledgehammer exercises.
Overhead Wooding Exercise