The smell of freshly cut canvas of green, dew from the grass wetting your cleats, leather and
the crack of the bat. It's that time again,
Baseball season. Still we see conditioning
programs focusing on the external rotators (ER) of the
shoudler (
supraspinatus,
infraspinatus,
teres minor). If you've been in baseball long enough you realize that the
ERs of the
shoulder do not perform external rotation of the
humerus while in the acceleration phase of the pitching motion. The importance of the
ERs come into play in deceleration but only a
fraction of the percentage. The majority of the deceleration comes form the opposite low back, hip and leg. See Serape Effect.
There is little need to train the
ERs to concentrically contract. The emphasis should be on teaching the entire body to share the responsibility of deceleration in order to protect the
shoulder.