The following article is from NewScientist. It covers a wide range of topics such as VO2 max to genetics. I'd recommend anyone who serious about training to read it. Bits in red a small side sections that come with the article. Enjoy. http://www.newscientist.com/channel/being-human/mg19526141.700-superhuman-what-gives-elite-athletes-the-edge.html
I read this when i was on the train to London, an interesting article. Especially the bit about Lance Armstrong.