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![3-Point Plank with Shoulder Extension](http://shop.shredz.com/cdn/shop/articles/617595958_640.jpg?v=1624074087)
Primary Muscles: Rectus Abdominis, Multifidus, Erector Spinae, Quadratus Lumborum, Transversus Abdominus
Secondary Muscles: Anterior Deltoids, Infraspinatus, Latissimus Dorsi, Subscapularis, Supraspinatus, Serratus Posterior
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