What is the first assessment to perform on a young healthy adult experiencing fatigue, loss of appetite, and lightheadedness after exercising in hot weather?

Measuring body temperature is crucial in this scenario because the young adult is experiencing fatigue, loss of appetite, and lightheadedness specifically after exercising in hot weather. These symptoms can be indicative of heat-related illnesses, such as heat exhaustion or heat stroke, which can occur in conditions of high temperature and exertion.

Assessing body temperature helps determine whether the individual has developed a temperature that is higher than normal, suggesting the body is struggling to regulate heat due to excessive heat exposure. An elevated body temperature is a key indicator that the person may be at risk for serious complications, and it can guide immediate interventions to cool the individual down and restore homeostasis.

While the other assessment options, like measuring blood pressure, checking blood glucose, and assessing hydration status, are relevant in a comprehensive assessment, prioritizing body temperature is essential in the context of potential heat-related issues. Recognizing the significance of temperature changes can lead to timely treatment and prevention of more severe symptoms or complications.