The 30-Day Pull Up Challenge for Men - Get Ripped... Get Hot Workout!
30-Day Pull-Up Challenge
31 day pull up progression challenge
train yourself pull up exercise
The Best Way To Do More Pull-Ups
Pull-Ups Guide - A Guide to one Pull-Up - Plus Pull Up Variations
How to use the assisted pull-up machine to help you progress to a full pull-up. | via @SparkPeople