I'm going to start with a program and so far it looks really good. But I have some questions, I hope they aren't to stupid but here it goes: When it says I'm about to do 6-12 reps should I pick a weight that does not allow me to reach more than 12 reps? I mean should I reach failure at least on the 12'th rep? And how often should I increase the weight? Every week? Or how do I know when to increase?
What it means is that you take a weight that you can do for at least 6 reps but no more then 12 reps, when you can do 12 reps you add weight the next workout and then work you way back up to 12 reps again.