Muscles Used: Pectorals, Serratus Anterior. Muscle Used For: Pectorals – Draws the shoulders and arms forward and inward, Serratus Anterior – Pushing and punching actions and is nicknamed ‘The Boxers Muscle’. Muscle Location: Pectorals – The chest, Serratus Anterior – Covers the side of the chest wall on the outside of the ribs.
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