I've been taking glucosamine/MSM or for several years--I suffered from an arthritic hip and started the glucosamine when my veterinarian recommended it for my old labrador--when he passed, I started using what was left of his glucosamine and what was near-crippling pain subsided almost totally. Most of the time I have no pain at all, but sometimes I still have a bit--kind of a ghost pain seeming to tell me I have to keep taking the stuff. I started taking it when I was almost 70; I'm now 75 and walk without pain, except sometimes in my feet.

I don't recall hearing of glucosamine being recommended for repetitive stress, but it's probably worth a try and is relatively inexpensive.

Charles