You may want to try supplementing with CoQ10.
Google on CoQ10 +statins or statin myopathy treatment
I've been using CoQ10 for several months now and when I call on the legs for some extra in a sprint to when climbing, they answer the call and respond. This was an effect I experienced after a couple of weeks.
CoQ10 treatment is still smoke and mirrors medicine. There is plenty of proof of what naturally produced CoQ10 does in the body but no evidence supplemental CoQ10 will do anything. Thus the word "may" when anything is written about the possible benefits. Take what you like but this is an expensive placebo in my opinion.