This may indeed be true. I personally have never had a patient who is both on statins and trains hard, and I'm pretty sure this particular scenario hasn't been studied. However, I also find that many people will blame the statins for any aches and pains when they may have nothing to do with it. Determining whether the culprit is the statin (in the absence of frank rhabdo, which makes it easy) is pretty difficult to suss out, since it takes some commitment on the part of the physician and the patient to experiment and be strict about what they take for a while, and be willing to follow up, and it's often not done because it's just too much trouble (the statin is just stopped and maybe listed as a class allergy). The hard fact, however, is that for some people who legitimately have an issue that cannot be reversed by diet alone, statins can prevent an early death. Everyone has heard the stories of very healthy people who suddenly die of a heart attack. Atherosclerosis is virtually 100% preventable these days. Obviously it would be best if people didn't have to take any medications, but some people's genetics may offer little other choice. But I'll be the first to admit that for the vast majority of people, we just don't know if diet and exercise is all they need, because they just won't do it.