If you need to lose some extra body fat or get in better cardiovascular shape, there's an easy solution that will cause you to lose 1lb per week, that's about 50lbs in a year, while simply commuting to work!
While the program is primarily used by military personnel to obtain a perfect physical fitness test (PFT) score of 20 pull-ups in a row, it is also a great program for rock climbers or anyone wanting to build upper-back and arm strength...