Hey, so I've been playing bass for about 10 years, and have always preferred playing with my fingers. However, I work in a factory and the work is really hard on my hands. After taking a 2 year break from music, it feels like my fingers are stiff, mostly on my picking hand. I've gotten into a band and we've been jamming 2-3 times a week plus whatever practice I squeeze in between, so I'm not sure if I'm still just that rusty or if my hands have been affected by my job. Does anyone have any hand excersizes they do to keep their fingers strong and limber?