Hormone levels don't explain a 15 year old's performance against other 15 year old's (Cummings is the nr 1 ranked 15 year old in the world in his division), nor

Hormone levels don't explain a 15 year old's performance against other 15 year old's (Cummings is the nr 1 ranked 15 year old in the world in his division), nor does it explain a better performance than 18 year olds who have higher testosterone levels. Anyway I think the original point wasn't so much the people who obsess over diet that he's perhaps referring to. Rather the fact I can name you a dozen top athletes from the top of my head who pretty much lived on McDonalds, drank 2 litres of soda a day or ate multiple candy packs a day. Changing something ridiculous like that to merely a sensible, normal diet, can actually help, and it's different from obsessing about replacing legumes in your diet with quinoa which probably isn't going to give you any gains whatsoever.