Side cramps, also known as exercise-related transient abdominal pain (ETAP), are a common issue for runners. They can be sharp, stabbing pains that occur in the side of the abdomen, and they can range from mild to severe. While the exact cause of side cramps is unknown, there are a number of factors that can contribute to them, including dehydration, electrolyte imbalance, and inadequate warm-up.
Side cramps can be a nuisance, but they can also be dangerous if they are severe enough to cause dehydration or electrolyte imbalance. In some cases, side cramps can even lead to more serious medical conditions, such as heatstroke or hyponatremia.