If possible don't use it! Shit has some nasty sides and can affect more than your liver! Try taking fish oil instead. This will raise your HDL which will then scrub the LDL out. Also, make sure you get plenty of soluble fiber. Also, Niacin works to reduce LDL as well as increase HDL.
If you do have to take it then make sure you get ~100mg of CoQ-10 as statins reduce this in the body. Even if you are on the statin it can't hurt to take the fish oil. SWALE, on this board, recommends 10g of fish oil per day.
As far as training, statins have shown some capacity to cause muscle soreness. I got it bad unless I drank 1.5 gallons of water a day. Any less than that and I was sore as hell...one point I could barely move my legs it was so damn bad. Other than that it didn't affect my training.
I got off of that shit as fast as I could...I only took it because my chol was up due to Accutane. Now that I'm off of one I got off of the other.
Good luck to ya bro!