Pull-ups are one of the most beneficial overall muscle and strength developers. A single pull-up is often one of the most difficult exercises. Here comes the 50 Pull-ups challenge for BlackBerry! This application gives you a training program that will see you well on your way to reaching this heady target by investing no more than forty minutes each week. Perform an initial test first & then this number will dictate your targets over the next few weeks. As the program progresses, the number of pull-ups per set increase and see you working your way slowly up towards the target. Each Pull-up has full details of how to do it along with images. A log book & graphs can be seen in the application.