My old dad used to say, "No-one ever came out fat from Belsen." Not politically correct nowadays, but I do actually believe you can't make
fat out of very little food. Something must have gone in, surplus to requirements, for the body to convert it into fat. I suppose one should adjust the intake to cater for one's age, lifestyle, health and hormone levels etc. I started to go to the gym some years ago, and the young lad who showed me the machines said, "If you do 15 mins (!!!) on this treadmill, you'll use up 50 calories." I thought, "Big deal! One biscuit and it's all on again!" I stopped going and have had a lovely time since then. But I'm far too plump now! (PS My downfall was crumpets, dripping with butter.)