Please help me to convince a friend that people that compete in World Championships in Powerlifting and World Strongest Man use some sort of Doping (usually steroids or Growth Hormone or both). I was trying to concinve him, explaining that steroids do play a large role when it come to strength and recovery. But he thinks that one can train himself up naturally, just by training a longer period of time i.e. 10 years instead of 5. What do you think, do competitiors in World Strongest Man use drugs?