Thanks, Zim!
I actually looked up some exercises. Along with needing more stamina exercises I need more stretch and basic muscle building, and I think this can help, especially when travelling or without equipment.
I WAS doing a lot of hot (105 degree or higher) intense yoga until I ran into a bump in the road 7-8 years back.
The hot yoga was very difficult, especially at the beginning, because I had declined in health and flexibility too far. But, in time, most of my debilitating injuries and accumulated weaknesses began to dissolve and actually reverse. (E.g., I started with a medical condition known as "frozen shoulder", and had been unable to lift my arms much above horizontal ... for the prior ten years; eventually, over a few yars, with persistent effort in spite of the pain, I 99%+ reversed that.
Anyway, thanks for the helpful suggestion. I think those of us who are still here have work to do. To do that work, we need to tip the odds a little in our favor every way we can, every day we can!