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A member asked:
What causes a pec major tear? which type of strain causes an immediate tear? can one rupture the pec only by pushing an object forward horizontally?
A doctor has provided 1 answer
Excess Sudden Use: Like all structures, tensile stress, beyond strength of weakest portion, results in tearing. The pectoral muscles originate from the anterior rib cage & insert at the lateral clavicle & proximal humerus. Contraction of these muscles pulls the lateral clavicle & upper humerus anterior. To push something away using arms requires pecs to transfer the push. Sudden, intense load most likely to tear.
Answered 8/21/2015
5.2k views
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