Protective head gear with moveable members

A method comprising:

• detecting, by a device comprising at least one sensor secured to a helmet and a hardware-implemented controller, an external force component applied to a user;
• and causing, by the device, one or more moveable members, coupled to an inner surface of the helmet that includes an exterior surface and the inner surface defining a cavity adapted to be fitted on the head of the user, to be displaced, in response to the external force component applied to the helmet, detected by the at least one sensor secured to the helmet, towards the head of the user in a direction approximately opposite an impact direction at which the detected external force component was applied in order to apply a counterforce to the head of the user, wherein at least one of the one or more moveable members comprises a shaft coupled to a moveable pad and at least one motor to controllably actuate the shaft, and wherein causing the one or more moveable members to be displaced comprises controllably actuating, by the device, the shaft coupled to the moveable pad to cause the moveable pad to be displaced in the direction approximately opposite the impact direction at which the detected external force component was applied with a displacement force computed from a magnitude of the detected force component.