OK, I bit the bullet and joined a gym, after 2 years of doing all my other exercise besides outdoor stuff at home.
I went to a "body bar and ball" class this AM.
Oy. It is exactly what i want, but I had to concentrate on not fainting. I kept thinking, "if you can climb 18% grades and ride for 65 miles, you can do this." It was a combo of weights, push ups, sit ups, stuff with bands, and more weights on the ball. A couple of balance things I definitely need to work up to.
Twice a week of this should get me in shape quite quickly. I hope I can ride tomorrow. In fact, I hope I'll be able to walk.