Nutrition before exercise significantly influences endurance through its impact on energy levels and performance. Consuming carbohydrates provides readily available energy, while hydration is essential for optimal physiological function. Pre-exercise meals or snacks should focus on easily digestible options that maximize glycogen stores, like fruits or whole grains. Proper nutrition timing is also crucial; eating too close to exercise can lead to discomfort. Overall, appropriate nutrient intake enhances stamina and performance during endurance activities.