This is an interesting, classic article in The Economist. It basically shows how similar humans are to fellow-primates…:

http://www.economist.com/news/business/21620197-getting-top-much-do-how-you-look-what-you-achieve-look-leader?fsrc=scn/fb/te/pe/ed/thelookofaleader

In any case it is good to stay fit and strong; a healthy mind in a healthy body!