Two-Jointed Muscles of the Lower Body: What They Are and How to Train

A muscle that is a flexor at one joint may also be a flexor or extensor at another. These are known as two-jointed muscles, and here are the most effective ways to train the ones in your lower body.

Are you even aware you possess muscles that perform multiple joint functions? That is, a commonly-known flexor at one joint may also be a flexor or extensor at another joint. These muscles are known as two-jointed muscles (TJM), also called biarticulate or biaxial muscles. Our bodies are amazing machines, and TJM's contribute to this amazement.

 

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