I also think that as we age we do less, I cant do half the stuff I did 10 years ago it kills me, at one time I would have had the living room walls stripped & re papered in a couple of days It takes me longer to do jobs round the house now , I joined a gym a few yrs ago... what a miserable experience... lots of miserable folk all doing the same as me & probably wishing they where elsewhere ...
If your wanting to maintain a fairly healthy weight, just do things in moderation & be as active as your health & body will allow ... people shouldn't be shamed for being heavie