The serratus anterior is a muscle group with multiple heads that connects the ribs to the inside of the scapula,. Weakness in the serratus anterior results in winging of the scapula
Relaxing and lengthening the serratus anterior opens the chest and draws the scapula toward each other.
Postures that lengthen the erector spinae include:
Padmasana with side bend
Contracting the serratus anterior protracts the scapula, drawing them forward and outward..
Postures that strengthen the erector spinae include:
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