So in the thread about Learning To Groom, there is a British video from youtube that demonstrates a proper grooming job. It shows a "strapping pad" and how to shwack the horse on the major muscles as part of the grooming process.
So to me, it just looks like spanking and I have had horses that didn't even like to be brushed wtih a dandy brush. What benefit is the "strapping". I'm really curious! Couldn't a the same benefits of increased circulation be reached with massage or brisk currying?