Well, to be more accurate: they are saying that proteins get created in response to physical force. These don't necessarily "reprogram the brain." It's just t

Well, to be more accurate: they are saying that proteins get created in response to physical force. These don't necessarily "reprogram the brain." It's just that punching your brother in the arm will result in a localized response long before the chemical response arrives from other organs in response to the brain's signals of pain.