I was surprised when I returned to this forum to find all your helpful messages. Thank you. Made me reflect some.

As far as my "core body" (oy!) ... I have always been lean and look athletic to some degree, but true, I confess, my stomach muscles need strenghtening.
So i have started with "low impact" exercises for that area.

Come spring, I will check out the bikes ya'll suggest.

Thanks again for everyone's input.