There are certain standard exercises that are classics. The push-up, the crunch, the chin-up. Each one has been performed and perfected for years, and is abandoned for the latest fad and then returned to when wisdom prevails. Each requires no piece of fancy equipment, and relies instead on gravity and your body weight. Today let’s take a closer look at the chin-up, and ask a few basic questions. Why do them? What are the benefits? What do you do if you can’t even do one? Is there a way to perfect your form, and what common mistakes should you be looking out for?