Nerve cells signal and stimulate muscles, these cells are called motor neurons. Their stimulation causes electrical activity in the muscle eliciting a contraction.

Studying muscular contractions during neck training researchers found that in a seated position there was 10% more electrical activity and 10% less when standing or laying down. Have a seat on the Pendulum Neck Machine and Get Strong.

Neck training on the Pendulum Neck Machine
Pendulum Neck Training