I know this is an old thread but i thought i would put my two pence worth in,
I started riding off road just over a year ago, when i first started my wrists used to really cripple me, it felt like the bones were rubbing together, for days after riding it was the same,
I had some boxing wraps and thought i would try them wrapping up right around my hand and wrist they worked a treat, I used them every ride for around six months then stopped, I have no trouble now,
I can only assume that my wrists became stronger.
Its a cheap option.