A hollow golf club head having an inner surface and an outer surface, the golf club head comprising: a strike face operative to impact a golf ball; and a body extending rearward from a perimeter of the strike face, wherein the strike face locally displaces relative to a portion of the body in response to an impact between the strike face and the golf ball; wherein, the golf club head comprises a flexure joint extending from the outer surface to the inner surface, the flexure joint including: a forward impact surface; a reaction surface in contact with the forward impact surface; and wherein, in response to the impact, the forward impact surface translates along the reaction surface and elastically displaces the reaction surface to permit an increased impact-induced displacement of the strike face; wherein the strike face defines a ball striking surface and a rear surface that is opposite the ball striking surface; characterised in that the body includes a reaction wall that is in contact with the rear surface of the strike face; and wherein the rear surface of the strike face is the forward impact surface of the flexure joint, and wherein the reaction wall forms the reaction surface of the flexure joint; and wherein the reaction wall is in contact with from about 30% to about 60% of the area of the rear surface. a strike face operative to impact a golf ball; and a body extending rearward from a perimeter of the strike face, wherein the strike face locally displaces relative to a portion of the body in response to an impact between the strike face and the golf ball; wherein, the golf club head comprises a flexure joint extending from the outer surface to the inner surface, the flexure joint including: a forward impact surface; a reaction surface in contact with the forward impact surface; and wherein, in response to the impact, the forward impact surface translates along the reaction surface and elastically displaces the reaction surface to permit an increased impact-induced displacement of the strike face; wherein the strike face defines a ball striking surface and a rear surface that is opposite the ball striking surface; characterised in that the body includes a reaction wall that is in contact with the rear surface of the strike face; and wherein the rear surface of the strike face is the forward impact surface of the flexure joint, and wherein the reaction wall forms the reaction surface of the flexure joint; and wherein the reaction wall is in contact with from about 30% to about 60% of the area of the rear surface. a forward impact surface; a reaction surface in contact with the forward impact surface; and wherein, in response to the impact, the forward impact surface translates along the reaction surface and elastically displaces the reaction surface to permit an increased impact-induced displacement of the strike face; wherein the strike face defines a ball striking surface and a rear surface that is opposite the ball striking surface; characterised in that the body includes a reaction wall that is in contact with the rear surface of the strike face; and wherein the rear surface of the strike face is the forward impact surface of the flexure joint, and wherein the reaction wall forms the reaction surface of the flexure joint; and wherein the reaction wall is in contact with from about 30% to about 60% of the area of the rear surface.