Glute max and sacral pain.

The gluteus maximus muscle is a major player in hip extension. Despite its involvement in walking, running, skating, and pretty much all types of upright movement it remains largely undeveloped in most bodies. This Lak of strength sets it up for overload injuries like trigger points and myofascial pain. These trigger points not only cause glute and hip pain but are also a common source of sacral pain as well. The best prevention for these problems is strong glutes!!! So stop sitting on your butt, and start strengthening it with resistance training.

Trigger point pain and the Teres Major muscle.

The Teres major muscle is located at the back of the armpit. It originates on the posterior aspect of the inferior angle of the scapula, and inserts and inserts on the medial lip of the intertubercular sulcus of the humerus. It’s main function is to assist adduction, internal rotation, and extension of the arm. This muscle only becomes active when there is resistance added to these movements. Trigger point pain from this muscle will cause pain to be felt deep into the posterior shoulder and down the back of the arm.