When I was doing much distance running a concept called the "eskimo
diet" flashed across the scene. All fat
and protein. After two weeks it was difficult to even job for more
then 10 minutes. Go to a website "shorpy" with
its thousands of vintage photographs. Fat people were the exception.
Exericse more, eat less, etc, etc. Some
might want to try a "cutting" drug used by bodybuilders,
"clenbuterol". Big increase in metabolic rate.