Been trying to find a means of better warmups. It's like waking up in the morning for me. Sucks, but there could be consequences if you don't.
Looking at getting a portable heating wrist pad w/ a wall outlet, usb power source, & car power source/charger. Less hassle of having to mess w/ a long ass cord.
Never heard of manuals inducing that type of injury (even minor). Probably just an inflammation response to your grip if they're near the head. Sucks though if it sets you back on time.