Which of the following is a common sign of dehydration in athletes?

Dry skin and lips is a well-recognized sign of dehydration in athletes. When the body lacks adequate hydration, the first areas to show symptoms are typically those that are externally vulnerable, such as the skin and mucous membranes. Dehydration reduces the moisture levels in the skin, leading to dryness. This can also cause chapped or cracked lips, making them indicative of a lack of fluid intake or excessive water loss through sweat during physical exertion.

In contrast, an increase in appetite, heightened energy levels, and ease of concentration are not typical signs of dehydration. In fact, dehydration often leads to decreased energy levels and may impair cognitive function, making concentration more difficult. Recognizing the signs of dehydration is crucial for athletes to maintain performance and overall health.