An exercise device including an outer portion and an inner portion positioned within the outer portion. The inner and outer portions are attached together at a wrist portion in a fluid sealed manner to form a fluid tight cavity between the inner and outer portions. The inner and outer portions are be shaped and sized to provide at least one fluid flow channel or path extending from the wrist portion to a finger portion to allow fluid to flow from the wrist portion to the finger portion and back again, when a user is conducting reciprocating exercises and the fluid cavity is at least partially filled with fluid.