Pull-ups is one of the traditional exercises which will never go out of style. It is certainly a tough, unforgiving, and superb exercise, which helps in building a sound fitness foundation by using the person's own body weight. It has been a part of civilian athletic training as well as military physical training. The benefits include promoting strength, balance, stability, and also developing several key muscles. Having said that, let's find out which are the muscles that are benefited by this exercise.