Depends on your definition of "poor", which is something this country does not understand. If you have NO money, then no, you are not fat by definition because you cannot afford meals in any sort of regularity to define having a diet. If you are fed by the state via benefits, then you have a guaranteed income to do with as you wish. Then you are into the realms of crap food, take-aways, access, education, and our personal favourite in my line of work - whether you actually give a fuck. You CAN find decent veg, meat etc and learn to cook for very little money. You can find time for personal fitness and wellbeing. Hell, I did. I earn just under 45K a year, and come across "the disadvantaged" on the same via state benefits only every single day. Its a lifestlyle choice.