The true scientific one is called Body by Science [1]. If you have 100 minutes, invest watching this [2] from God himself (Doug McGuff M.D.).

P.S. The next The 21 Convention will be in January 2015 [3].

[1] http://www.bodybyscience.net/ [2] http://www.youtube.com/watch?v=2PdJFbjWHEU [3] http://www.the21convention.com/