What are the symptoms of hypothermia in swimmers?

The symptoms of hypothermia in swimmers are characterized by shivering, confusion, and decreased motor coordination. Shivering is the body's initial response to cold as it attempts to generate heat through muscle activity. As hypothermia progresses, confusion can set in because the body's core temperature drops and affects brain function. Decreased motor coordination occurs due to the impact of cold on the muscles and nervous system, impairing balance and control over movements, which can be particularly dangerous for swimmers as it increases the risk of drowning.

The other options describe conditions that are not typically associated with hypothermia. Excessive sweating and rapid heartbeat are more aligned with heat-related illnesses rather than cold exposure. Dizziness and loss of appetite can occur due to a variety of reasons but are not definitive indicators of hypothermia. Increased energy and heightened sense of awareness are contrary to the effects of hypothermia, which tends to suppress bodily functions and cognitive clarity due to the cold. Thus, option A accurately reflects the symptoms one would expect to see in a swimmer suffering from hypothermia.