I know a few folks who’ve had knee and hip replacements and it got me to wondering what can be done by young people to avoid running into this problem later in life.
I would imagine that being obese can’t be good for your joints, but what else?
Does exercise make the joints last longer or does it wear them out faster?
Also, I’ve never heard of anyone getting an ankle replacement. Why don’t those wear out as fast as hips and knees?
I didn’t know it was possible for your rod to have a joint, but many congrats on your good fortune!
Dammit!!! I wanted to make the first rod joke.
Oh Og, wait, wait, I didn’t read the whole OP in my haste.
Exercising my joint seems have been benificial.
ALLLLL RIGHT,
Make one little typo!
You expected mercy ?? What is this, your first barbecue ? 
I have some damaged joints, and am taking glucosamine and condroitin with some other compound, to facilitate joint health and the protection of sinovial fluids.
What actions? Avoiding repetitive motions. Using orthotics if your feet are rolled out, in or you have flat arches. Avoid shoes that allow the heel/ankle/knee/hip alignment to move out of true, thus wearing the joints involved in walking in an unnatural way with every step.
Never enter into a land war with a Sicillian. Oops. Wrong thread.
Don’t remain sedentary if you currently are. Move those joints, it keeps em better lubricated !
Cartooniverse
I went to a conference on Tribology several years ago specifically focused on joint replacement parts, procedures, revisions, improvements, etc. One of the speakers (from a Swiss company that manufactured said replacement equipment) said that to avoid a future joint replacement you should:
Not jog
Not ski
Have moderate sex
I agree with 1 and 2 but absolutely refuse to comply with requirement 3, what’s the fun in that???
No kidding. What is a person supposed to do if their particular bent is to have utterly wild hot monkey sex with a staunch Conservative ?
Don’t play hockey.
I think the key is to do just the right amount of exercise and do it routinely enough to know how to do it safely and not get injured. Lots of old people in my family, some who had desk jobs, some who were on their feet all day, and the knee/hip problems seem to come mostly with osteoporosis. I’m related to some very sedentary old ladies who had knee replacement or hip replacement surgery (or both) (and why they needed it I have no idea, as one in particular does nothing except sit in a massaging Barcalounger watching TV 14 hours a day, then she goes to bed). The old people I know who have good knees/hips have always been at least moderately active, up to extremely active (tennis, golf, skiing–yes, even skiing!–bowling, mountain climbing, gardening) and the ones who were debilitated to the point of needing (or thinking they needed) surgery tended to be overweight, not very active, hired other people to do their housework/mow their lawns, drove three blocks to the grocery store, etc.
Obviously this is anecdotal and is not data, genetic makeup is important, and YMMV.