He's the creator of the TB12 method and has worked with Brady as a personal trainer and body coach since 2004. I also asked Guerrero to respond to some of the criticism the TB12 method has received.

His extreme diet is a key part of what he refers to as the TB12 Method, an approach consisting of 12 fitness principles that Brady outlines in his book, called "The TB12 Method: How to Achieve a ...

Now, football fans can learn all of Brady's fitness secrets in his new book, entitled The TB12 Method: How to Achieve a Lifetime of Sustained Peak Performance. Published in September, the book is ...