The next frontier in athletic doping -- genes

http://www.cnn.com/2010/HEALTH/02/19/genetic.doping/index.html

Scientists are arguing that there may be alternative ways to increase endurance and muscle build up other than steroids. Gene doping is a new term used to describe a change created intentionally to a person's DNA through various means, from injection to pill. This article explores the potentials of what gene doping can do to the human body.