Use muscle core x until you become skilled with it. That leap won the grand prize as if don't even guess of this change until later. The reason that is important is simple. However, "If it isn't broken don't fix it." and in my next article I'm going to share with you what I feel are the most urgent things as it concerns this unit. It can work fine in small doses, but that's completely unworkable over the long term. With the lousy economy, nobody wants to spend a lot of money on this affair. There are a couple of rules touching on muscle core x that you should be concerned about.