Extreme endurance events, such as ultra-marathons, carry potential risks, including overtraining, severe dehydration, and increased susceptibility to injuries. Participants may experience gastrointestinal distress, heat-related illnesses, and muscle damage due to prolonged physical stress. Additionally, the mental strain associated with these events can lead to exhaustion and compromised decision-making abilities. Proper training, nutrition, and recovery strategies are critical to minimizing these risks. Understanding the limitations of one’s body is essential for safe participation in extreme endurance activities.