What are the three levels of hypothermia?

The classification of hypothermia into three levels—mild, moderate, and severe—is widely accepted in the medical and sports communities to describe the progression of the condition based on a person's core temperature and symptoms.

Mild hypothermia is typically characterized by a core body temperature ranging from about 50°F to 60°F (10°C to 15.6°C), where an individual may exhibit signs such as shivering, increasing heart rate, and a sense of cold. Moderate hypothermia occurs as the temperature drops further, generally between 50°F and 50°F (10°C to 33.3°C), leading to more severe symptoms including confusion, exhaustion, and reduced shivering reflexes. Severe hypothermia occurs when core temperatures fall below 50°F (10°C), which can result in life-threatening conditions including loss of consciousness and a significantly reduced heart rate.

This classification is vital for coaches and athletes in understanding the risks associated with cold-weather activities, enabling them to recognize symptoms early and take appropriate actions to mitigate the effects of hypothermia. The other options do not accurately reflect the medically recognized classifications of hypothermia, which is crucial information for ensuring safety during running and outdoor activities in cold environments.