In the hills of Mexico, a tribe of Indians carries an ancient secret: a diet and fitness regimen that has allowed them to outrun death and disease. We set out to discover how the rest of us can catch up.

http://www.menshealth.com/men/fitness/motivation/longevity/article/3b4b1ca01e91c010VgnVCM10000013281eac/6

http://www.popsci.com/entertainment-amp-gaming/article/2009-05/running-barefoot