the stress of old age

My weight fluctuates like Oprah's.
No kidding.
I go from a very skinny size 4 to a more matronly 10. Up and down from year to year. I reshuffle my closet from time to time. There's a box of clothing marked "6," one marked "8" and there's the 4, and the 10. It's time to begin the descent. I have been sitting on my ever-expanding bottom ever since the doctor explained that my pinkie toe, though small, was split down the center.
I am finally healed, you know. I even have skied. Exercise is now possible.
But then I went to the doctor a week or so ago for a sinus infection. I mentioned to the doctor about my aching elbow. That was not so smart. He diagnosed me with tendonitis. His treatment of choice involved skewering my sore elbow with a long needle and a dose of cortisone. The beauty of this kind of shot is that it puts the ache of tendonitis right into perspective. I thought it hurt before! After the shot, it hurts much. much worse. Now I know that when he told me not to use it so much, he really meant it. It's like he backed up his command with a threat.
This means that I can't do push-ups. Or lift heavy weights. At this rate, I am becoming a heavy weight.
It's very annoying.
Even Kara is working out. She's addicted. Always before, she would have this alarming allergic reaction to exercise of any kind. She'd, like, shake and look all spooked. It's weird, because she actually claims to Like It now.
What kind of effective exercise can be done without over-stressing a weakened toe, or over-stressing a weakened elbow? I am falling apart, I tell you.