Has anyone dealt with a member who is taking crestor and experiencing muscle atrophy?

In 4 weeks of this drug http://www.internationaldrugmart.com/crestor.html, my cholesterol has gone from 236 down to 143. I have been trying to eat better and exercise more since I started taking it. I have noticed some minor aches and pains in my legs, but not a big deal. As I said, I have been exercising more and that could be part of it.