Pec minor is overused majorly in modern daily life and is most often a major culprit in the internally rotated 'poor' posture many of us suffer from.
The pec minor should work in harmony with it's synergists (muscles that do the same job as the pec minor) and it's antagonists, the opposing muscles that lengthen when the pec minor contracts and shorten as it lengthens. Overuse due to repetitive movements/ poor posture can lead to imbalance in these muscles that make up the shoulder complex. Paying extra close attention to the position of the scapulae, shoulders and head position can help in discovering imbalance. Pec minor may have to overwork due to the inhibition of other muscles, this can lead trigger points developing in the muscle and to pain in other muscles due to imbalance.
Muscles that become inhibited or 'slack' are:
-Mid/ Lower traps
-Serratus anterior lower fibers
After releasing the pec minor, we need to re-educate and strengthen the muscles that have become inhibited to achieve a true correctional outcome in posture and reduction in pain that we desire. If we only release the pec minor, it will only get tight again.
Rehab - it's not easy or fun but it's pretty damn important.
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