Deflection of Beams
The deformation of a beam is usually expressed in terms of its deflection from its original unloaded position. The deflection is measured from the original neutral surface of the beam to the neutral surface of the deformed beam. The configuration assumed by the deformed neutral surface is known as the elastic curve of the beam.
Deflection of Necks
The deformation of a neck is usually expressed in terms of its deflection from its original unloaded position.
It make since to train your beam and reduce deflection.
TRAIN THOSE NECKS-KEEP SHRUGIN'
Pendulum Neck Machines Indiana Weight Room