It definitely caused all kinds of injuries for me, everything from arm curls to running on treadmill was causing tweaks and pulled calf muscles that I never had before. I took crestor and tried 2 other statins, same result on all of them. I had to stop taking them and when I did, everything got better and the injuries stopped reoccurring. The thing that made me realize it was so many different weight lifting injuries were occurring, it wasnt just once thing but many different injuries. Statins definitely will affect you, or at least the statins will definitely affect some people different then others.