National Academy of Sports Medicine (NASM) Certified Nutrition Coach (CNC) Practice Exam

Exercise-Associated Hyponatremia (EAH) occurs when there is an imbalance of sodium in the body due to excessive fluid intake during prolonged physical activity, leading to low sodium levels. The symptoms of EAH can vary in severity.

Confusion, disorientation, cramping, vomiting, and weakness represent some of the early and less severe physical manifestations of EAH. These symptoms can often be attributed to the body's struggle to maintain electrolyte balance and can serve as warning signs of an electrolyte imbalance. While these may not indicate a life-threatening condition initially, they do signal that a participant needs immediate attention to avoid progression to more serious health issues.

The other options, while they may confirm mild distress or other unrelated conditions, do not directly relate to the recognized symptoms of EAH. For example, headaches and fatigue may result from a variety of other causes, such as dehydration or general exhaustion, rather than specifically indicating sodium imbalance. Nausea and muscle soreness can also stem from numerous factors unrelated to EAH. Therefore, symptoms like confusion, disorientation, cramping, vomiting, and weakness are more representative of the initial signs of Exercise-Associated Hyponatremia, making them the correct answer.