Quote:
Originally Posted by
SeanathonHuff 
I don't seem to be adding muscle mass by doing pull-ups every other day. I think a large portion of the problem is I'm not actually straining my muscles that much. Should I do two days on-one day off to increase the incentive of my muscles to repair and enlarge?
Yeah, I would definitely change that up if you are trying to gain size. Doing sets of less than failure several times per day is a great way to increase performance ability, but its not geared towards mass.
If you want to gain mass, your best best is an 8-12 rep range and going to failure. Back is a large muscle group, so for that type of workout, if you are pushing yourself to the level you really need to be to cause serious uscle growth, you need more than one day's rest.
I do a full on BB bodypart split so I only hit back once per week, but I'd say MAYBE you could hit it hard twice per week at most. (depending on how you want to set up your split).