Answer:
[tex][/tex] The runner likely experienced muscle cramps due to dehydration, loss of electrolytes, or fatigue during the race. Muscle cramps are involuntary contractions of muscles that can be caused by various factors, including dehydration, electrolyte imbalances (such as low levels of potassium, magnesium, or calcium), and muscle fatigue from prolonged physical exertion.
During intense exercise like a cross country race, the body loses water and electrolytes through sweat, leading to dehydration and potential imbalances that can trigger muscle cramps. Resting and rehydrating after the race helps replenish fluids and electrolytes, allowing the muscles to relax and the cramps to subside.
To prevent muscle cramps during future races, the runner should focus on staying well-hydrated before, during, and after the race, maintaining proper electrolyte balance through a balanced diet or supplements, and training appropriately to improve endurance and reduce muscle fatigue.