Age 57 here. We kind of blobbed up a bit during the pandemic. About a 18 months ago we started walking every day at lunch, about 2.5 miles. Not huge distance but just being consistent with it I think has helped us a lot. We did a few hikes this year that I don’t think we could have done (or not without more injury risk) without the consistent walking.

For me tendonitis has been a thing. Got my first case of it in my late 20s and have had several bouts of it since - achilles, hip flexors, wrist, etc. Learning to recognize that as a problem and what to do to recover is important, as repetitive stress injuries can keep you from doing a lot of things.