The bicep has two heads (hence the prefix “bi”). The two heads are the long head and the short head. However, there is an additional muscle, the brachialis, which technically is not part of the bicep but contributes to the overall development of your biceps. With this in mind, you can find beneficial exercises that target both of these to gain an aesthetically symmetrical look! For the majority of men, the best part of arm day is when you get to grab a pair of dumbbells and curl them.