Scapular Movement

The primary movement is what we refer to as ‘Protraction and Retraction’. What does that mean? Think about rowing a boat in the direction that your back is facing. Moving the ‘Oar Blade’ backwards, to the front of the boat, gets you ready to move water and do work in a positive direction … towards the bow or front of the boat. You extend your hands and thus your shoulders forward (anterior to your body), which moves the ‘Oar Blade’ posteriorly to the body core … pushing your hands forward moves the ‘Oar Blade’ back. When you ‘Pull On The Grip Of The Oar’, you move water aft or towards the stern of the boat. Newtons ‘Action & Reaction’ goes into effect and we advance or propel the boat forward.
So, ‘Protraction (Anterior Hand Movement – away from the chest) also Moves the Shoulder Blades Forward’. The opposite occurs when you actually ‘Pull On The Grip Of The Oar’ to move a volume (Mass) of water. It is referred to as ‘Retraction or Posterior Hand Movement’.