Hello ladytiger: Well... Unfortunately I have nothing to offer you with regard to any of this. I'm just a skinny old man! My only exercise is walking my dog. We take a couple of fairly long walks twice a day, regardless of the weather... sunshine, rain, heat, snow, ice, wind... it doesn't matter... we're out there. I've had serious back problems in years past. I have a ruptured disc in my low back & sciatica. I've had physical therapy & done yoga. But I've found that walking has been the best for me.
As far as eating goes, I don't do anything special. I eat moderate portions at mealtime & I don't snack. I also avoid salt as much as possible; & whenever I happen to eat something salty, I can pretty-much expect to have gained a couple of pounds the next day.
My best wishes to you...