I know my advice on these matters of health usually backfire and piss people off, but I keep posting them because I'm stupid that way -- sorry, but here is goes.
Maybe you do, but if you don't I recommend you watch the Biggest Loser on NBC (in my area it's every tuesday from 8-10pm)
http://www.nbc.com/the-biggest-loser/. There are tons of examples every season where people that participate on that show end up throwing out pills (
many different types), including HBP medication. Another thing I like about the show is that they don't focus on one type of exercise, you just can't do one type to maintain a strong body as you age. That's why you'll see a lot of resistance training, not just cardio on that show.
Seems like everyone focuses on cardio when they decide to start up an exercise program because they need to "get in shape". Not true, weightlifting is very important for keeping the skeletal system strong, including those very problematic joints. I don't believe there is one exercise program to keep the body strong, but if someone put a gun to my head and name on I'd say weightlifting, of course in all its various forms; you can even get a damn good cardio workout with weights.
I know many cyclists, hikers and runners with knee problems, including me. The difference is that they pop OTC drugs like candy, they go way above the recommended dosage on the label. I don't use the stuff at all; when my knee starts hurting I build it up in the gym and the pain goes away. Maybe one day I'll have to resort to meds, but at 47 I'm still going strong and I reguarly run around here.