Two-Jointed Muscles of the Arms: How to Train Them

A two-jointed muscle involves multiple joints and certain considerations should be taken in training. Let's look at two-jointed arm muscles.

In another article, I addressed the two-jointed muscles (TJM) of the lower body. This discussion will focus on the TJM of the arms: the biceps and triceps. So, here is a quick tutorial on two-jointed muscles: As the name implies, a TJM crosses two joints and performs dual functions. In example, it could be a flexor at one end and either a flexor or an extensor at the other end.

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