Personally, as a coach, I don't like to use shame as a motivator, and can't remember the last time I did. In fact, I do not like think "shame and blame" is appropriate period as a way to deal with anyone.
I do, however, know the temptation of doing so, as a coach. Some kids (and adults) came up in families where shame and blame were commonly used, so respond to it as a motivator. At those times I have to separate my ego and desires from those of the student.
I just read, while sitting in the orthodontists office waiting for my boys, the story of Kayla Harrison and the abuse she suffered at the hands of her former Judo coach.
Apropos of nothing
I feel like shaming your athletes is going to make them waaay more likely to just up and quit.
Additionally, beating your athletes would seem to violate the rules about no striking in Judo.
There's shame and there's shame.
Embarrassing someone by making them stay after to do extra training, or dropping them to do pushups is vastly different than making them stand on a box in their underwear pretending to be a teapot.
A stern word was enough in class, to shame me into redoubling my efforts.
Beating students is so much more about the teachers' egos, than anything to do with the students.