T Nation

What weeks should I use MAG-10!

I’m going to be doing a 4 week back and biceps program from this site ina couple of weeks. I just got my order of MAG-10, and was wondering what weeks I should use it? Should I use it weeks 2-3 or 3 and 4? If I use it weeks 3-4 should I take week 5 off or start something new?