You can give yourself tunnel carpel by holding a concertina wrong, After I pracitce on my accordion, I feel some pulling in my right hand... Mostly after doing 15 min of Hannan. My left arm gets it after about 10 min of bellows shakes.

My lips used to get real tired after blowing into a practice chanter for a half an hour. Darn things are hard to blow.

-Fadac