I have seen records set of people doing these after watching videos on youtube. I originally got onto looking at these because I have been having wrist problems from doing alot of stuff on my hands, like handstands, and turtles, which if not done properly twist the wrist. I started doing antagonist excercises like reverse wrist curls and one-armed fist pronehold.
I was wondering because of the awkward position, would it strengthen the wrist by doing backhanded pushups/holds, or would it just damage it even more? Obviously technique like tensing the wrist whilst under the strain of the body would need to be applied to prevent static injury, and slow eccentrics etc the basics like that.
I just thought it could be an antagonist for the wrists when it comes to handstands and pushups etc.
I am trying ANYthing to try and fix my wrist, I will try these out for a bit whilst I wait for feedback.