..........I'm a little confused lol..........bracing against the bit is NOT a good thing, and riders should have soft hands, not hard. I was using a sarcastic tone in my last post (not that you would have known b/c it's over the Internet lol!).
Even with a jockey and racehorse, I can't imagine you want to teach bracing by having hard hands. Sadly, I think racehorses bracing is just an end result of their handling. A horse can run without bracing. It is called keeping a light enough contact for ready control, but allowing the neck to stretch out and the horse to run.
I think teaching bracing could be very dangerous?? The jockey might lose side to side control as a result, as well as forward/back control.