it isn't a secret what he is doing as he has talked about it
1. he sleeps 9 hours a night PERIOD, does not stay up watching garbage tv like most americans
2. he ignores the negativity
3. he eats natural organic whole foods, ZERO junk food.
*it also helps that in today's NFL if you even sneeze on a QB it is a penalty. QB's are protected today like never before. it also helps that he has been in the same system for his entire career and part of the reason he rarely is sacked is that system he gets rid of the ball very quickly. but to do that you have to be able to know where everyone on the field is on both sides, that is a rare ability
* and yes I believe he is on HGH. Peyton Manning retired during an investigation where his wife had it delivered to their house. they never looked into it cause he retired and he is a 'golden boy' so the NFL doesn't want to fuck with him or their image. the way the NFL tests for PED's it would be impossible to use HGH and get caught so i believe a large % of NFL players are using the stuff