What non-exercise activity do you wish would keep you fit? Not a very inspiring question. Working or playing on my computer. I think I spend more hours doing that than anything else.
Move Your Body Staying Strong tip: I watch joggers others who are into exercise. It is my fantasy that most were born to exercise which in my book means slender of body to begin with. I say that because for the first thirty years of my life, I was mostly under-weight and in my mid-twenties began adding about 5 pounds more a year. Had a great figure in my early thirties. Mostly downhill from there. The point, however, is that more I weighed, the more arduous exercising became. I have a body memory of when I jogged with delight. I felt light as a feather and carried forward by the air. When I weighed the most, I felt like a thundering elephant. Not fun.
My tips? Fit exercise into what you already do–walking the dog does it for me. Throughout the day, stand a bit more; walk some extra steps; jump rope, but use only the arm motions; keep some weights in the bathroom; aim for three ten minute exercise periods a day. Increase time and effort gradually. Guaranteed? Absolutely not; but worked for me and one or another variation might work for you. Experiment, I can say when I am on track with my rather modest exercise program, a feel a thousand times better than when I give in to being a potato. Good luck and stay strong.