I started riding a sportbike 2 weeks ago, and since I work out a lot, holding myself by my core is not a problem. The problem is have is both my thumbs hurt a lot. I'm not white knuckling the shit out of the handle bars, and still, my thumbs hurt.
I’ve never had pain in my wrists because I ride like this. There is no pressure in my arms a single moment, even counter steering, the force comes from my shoulders & not my arms