The physical act of drumming uses all the muscles and tendons fro your head down. RSI symptoms tend to accumulate in the hands, but the tension starts all the way up. It’s good to stretch those parts out and give’em a good massaging-which isn’t as easy as you think. I’ve developed these strategies over the course of a decade, and I am able to work out on the pad as hard as I want without having to take any RSI related breaks.