RESEARCH AND DEVELOPMENT

ALL ABOUT EXTERNAL ROTATION

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BERNSTEIN PRINCIPLE - Originated by Soviet neurologist, Nikolai Bernstein, this scientific principle states that the body will organize itself in accordance to the overall goal of balance and movement. 

If ER is initiated too early or out of sync with lower half energy flows, the results will be premature rotation of hips and front side. This is due to PRR initializing because lower half energy load is too powerful for the shoulder and elbow to withstand. According to engineering principles (especially electrical and impact), energy must be downgraded into a usable form. If not, the result is breakage or an uncontainment of energy. 

External rotation (ER) is the lateral rotation of the throwing shoulder that is defined in biomechanics and kinesiology as a transverse movement plane. It is initiated right after foot strike in power arms.

 

Rotating hips transfer the linear lower half energy into the arm, with ER transferring energy down the kinetic chain reaction into the elbow. Elasticity is crucial for ER and its range of motion (ROM) capacities. The more ER, the harder you throw, but ER is NOT a conscious motor pattern.

 

It is dictated upon how efficient and powerful the kinetic chain reaction is with energy flows and transfers. One of VeloPRO's best training benefits lays within improving ER's elastic energy output.

Too much ER (compared to internal rotation) can cause major stress on the throwing shoulder. This is due to energy overloading the deceleration muscles of the throwing shoulder - which is the scapula and labrum. Pitchers with bigger ROMs in ER consistently suffer from scapula and labral injuries. Likewise, too much internal rotation (IR), compared to ER sees trends in elbow injuries - which is the axis point for accelerative energy. 

1st VeloPRO session with Padres RHP Jorge Reyes. Left is previous. Right is new. Comparisons are at same time in delivery. Reyes improved ER drastically. Sync and timing of when ER is produced within his delivery is now optimized into dynamic balance.

MECHANICAL COMPENSATIONS 

EQUAL AND OPPOSITE REACTIONS MUST BE PROPORTIONATE

 
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