People complain of pain in the front of the shoulder when reaching to the side while their arm is at shoulder level. It is easy to adapt movement to avoid this unless there is a specific activity like holding the passenger seat while driving.
This problem can be aggravated by carrying a backpack. The straps create pressure on the trigger point eliciting the pain pattern while carrying the pack. This also aggravates the muscle so that it may become chronic. The shoulder may also ache from the pressure of a seat belt.
This muscle can become chronically short when the middle trapezius creates high and tight shoulders and the humerus hangs closer to the collar bone.
This produces “that good stretch feeling” in the front of the shoulder during the Warrior-2 pose. If it is chronic, it will restrict the arm from lifting to shoulder height, when unwatched. If it is happening regularly, the stretch lengthens the clavicular pec but the muscle will still have weakness during contraction. In this case, the shoulder joints need work.
The trigger point is activated by strenuously reaching forward as when putting things on a shelf, reaching over something to paint or reaching out to grab a falling object. One client complained of this after spending some time trying to reach over a deep dresser to hang pictures.
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