There is myth that anabolic steroids decrease endurance. However, they actually increase endurance by creating more red blood cells. Another common myth surrounding anabolic steroids is that they cause the penis to shrink. This is not true – although it can be true for the testicles. The effect isn’t permanent though, and the testicles will return to normal size once the cycle is concluded. Learn more about facts and myths of anabolic steroids on the following infographic.