I'm 61 but still enjoy playing competitive BB.  Last fall I got to the point I could not run, sometimes it was like my legs were going to give out.  Not a lot of pain just couldn't move like I wanted.  Have always kept tuned-up with a chiropractor but they even struggled with me.  Finally after months of sticking with his adjustments and me stretching and fighting through playing BB, I'm finally back to where I want to be.  My problem was very tight muscles on my right side, and then in my hip.  The Dr. and I think it all started with a sprained foot (BB) that led to my other issues
Find a good chiropractor and stick with it.  My chiropractor is the only reason I'm still playing ball at my age.