To relieve a cramp in the calf, a diver should do what?

To relieve a cramp in the calf, bending the toe of the fin toward the knee effectively stretches the calf muscle. This motion counteracts the contraction of the muscle that causes the cramp, helping to alleviate the discomfort. By flexing the foot in this manner, the diver elongates the muscle fibers, which can promote relaxation and ultimately relieve the cramping sensation. This method is practical for divers, as it can be performed while still wearing fins and typically does not require any additional tools or help.

Other methods, such as stretching the opposite leg or massaging the area, can also be helpful but may be less immediate or feasible in the underwater environment. Twisting the ankle, while it may provide some movement, does not specifically target the calf muscle in the way that bending the toe does.