Q: I am almost 50 and making incredible gains with the 4X method. I was reading that top trainer Charles Glass believes new muscle growth can be created with this style, thickening new fibers as well as expanding the sarcoplasm. However, he says you should still go “heavy” every so often. Every time I do that, my joints ache for days. Should I just put up with it and pile on the poundage every couple of weeks?

A: If you like going mega heavy, do it—but you’ll suffer the consequences. Glass says to train heavy every so often in order to keep the type 2B power fibers growing… [Read more…]