Hi Dale. Yeah, man, get that rhythm and keep it going. <g>
A little FWIW. I got 15 years on you and didn't do much for my own good from about 40 through 60, but I started from fairly good shape. Where I'm at now, I've had a few things impressed on me, learned the bad way. And I've gotten religion in the last couple years and can feel things coming back slowly as I get more exercise and movement into my life.
There is an enemy in our midst: It's called the chair. Or maybe it's just an enemy when it teams up with a PC or TV or
books or something. But it _is_ an enemy. When used more than an hour a day, not exercising is only part of the problem. It actively messes up the circulation and joint movement from the waist down.
Keep up the movement, always, even if you get lazy or something, keep up the movement. Like walking 2-3 miles a day, minimum - or equivalent. That keeps a little aerobic going and the joints don't tighten so much. Sounds like you got no issues now - just want to emphasize, don't stop, except to heal.
Actively living brings a few injuries, comes with the territory. Muscle/tendon healing requires total rest (but not immobility) and time. So when something bad happens, stop whatever causes the pain. Do things a different way, and do them slowly so you have time to react to the first twinge of pain and stop and reroute QUICK. I've gone through severe tendinitis in both wrists, both elbows and both shoulders, badly strained Achilles tendons, both sides. All healed but only with time and great care. I even had to figure out how to place my hands on the bed when sleeping to ease my wrists. But it does heal. Hot/cold immersions help when you can do it. Healing needs circulation, more the better, and the small system shock of hot/cold therapy increases circulation a bit. I got this from a concert violinist. Musicians depend totally on the health of their hands and do all they can to enhance it. Very few doctors have anything at all to offer. There are no pills that help the healing and medical experts don't even know what detail processes are involved. Every prescription I've heard about, results were all "depends, varies, inconclusive, not statistically meaningful..." - nothing consistent or notable. Perhaps a nod to topical antihistamine lotions, but there were no consistent or superior results; they just let you avoid nuking your whole body with the drug taken orally.
When you have a muscle or tendon injury it's easy, very easy, to make it worse. One problem is that the pain goes away when the area warms up with use so you think it's "better" and work it like you normally would. Later or next morning you find out different. I have worked through most of my injuries, sometimes foolishly and sometimes with care and success. The key is doing things using different muscles and slowly so you can STOP instantly when (not if) you hit the pain spot. Steroids injected into the injury can work... Well, in a very severe emergency, the life altering kind. Under any other circumstances, steroids are the worst thing you can do to yourself. They actively degrade the soft tissue over time.
A heads up, perhaps. I have found two particular areas that I'd like to go back and be better about: My hips and legs and my abs. Walking or dancing or some equivalent, every day more or less, would have helped a lot with the hips and legs. (Also, less chair - see above.) Not sure what generic activity works the abs daily in this advanced society we live in - maybe some of the martial arts. But when you find something, stick to it, get that religion. The abs (or maybe I should say "core muscle") are what provide for full body movement and also support the backbone. As they degrade, your walking and bending, really all movement, gets reduced and constricted and you start having unnecessary back problems. As that happens you start getting less confident and self restrict your movement more and it's a spiral down in the wrong direction. I _know_ this.
Everything above is on my personal record. I'm can testify this healthy movement stuff is as important as they say. Excepting for the lazy bone, it's hard to see a down side. And that's my two cents for today. Keep on truckin'!
Rufus