I just turned 50. I played bass since 5 and professionally for 30 years, and I rip. I retired and went from playing bass to playing lead guitar. Since then (2 years ago) I've had problems and they're getting worse. My knuckles get so bad I must stop playing for a couple days. String bending takes a real toll! Bass playing has little string bending and mostly is just pressing down on the strings. I end up getting the claw hand and it hurts bad to pry open my hand suddenly. I call it the curse! Exercises just puts more wear on the joints. I tried stuff called Oscal, but it didn't help. I also used some creams to no avail.

I'm going to try the Syn-Flex mentioned above in a post. http://www.easysource.com/synflex/syn_info.htm It seems to have a lot of ingredients mentioned by others.

I'll reply in a month or two and let yall know if it helps.

Peace