Which of the following is NOT a symptom of exertional heat exhaustion?

Exertional heat exhaustion is a heat-related illness that occurs when the body loses an excessive amount of water and salt, typically through sweating, leading to a variety of symptoms. Among the listed symptoms, flushed skin is not typically associated with exertional heat exhaustion. Instead, individuals suffering from heat exhaustion often present with pale or clammy skin due to the body's efforts to cool down through sweating.

The other symptoms listed, such as dizziness, loss of coordination, and a rapid strong pulse, are indeed common manifestations of exertional heat exhaustion. Dizziness can occur as a result of decreased blood flow to the brain due to dehydration, while loss of coordination might result from electrolyte imbalances or dehydration affecting motor control. A rapid strong pulse is the body's response to the stress of overheating and indicates increased heart rate as it tries to cool itself down. Understanding these symptoms can help in the timely recognition and management of heat-related illnesses in athletes and active individuals.