The Proprioceptive Sense is involved in coordinating how our muscles and joints should react. This is the sense that can coordinate us to kick the soccer ball to the goal, or our hand eye coordination. If we are unable to process this sense correctly then the reactions can be clumsy or unbalanced.
Stimulating our muscles and joints to send messages back to the brain instead of the other way and can help to give us a little reset.
This is especially effective with weight and physical activities, again this is very individual what works for each persons age or ability.