Nutrition Is The Foundation of Training
Eat carbs, protein, fat, and color at every meal
Don't skip breakfast
Eat every 2-3 hours
Sip water throughout the day - don't chug. You're aiming for 3-4 liters/day which is about 3-4 Nalgene water bottles.
Nearly all high school athletes under fuel so focus on eating more and diversifying your diet rather than restricting
Within 1-2 hours of practice switch to easy-to-digest carbs and electrolyte drinks (think pretzels + gatorade)
Eat a snack with protein/carbs within 1 hour of practice ending (think chocolate milk + protein bar) to replenish energy and build muscle
Eat lunch / dinner within 2 hours of practice finishing.
Have a bedtime snack.
Talk to a your doctor and a registered dietician if you are having trouble with low-iron, digestion issues, missing your period, or are feeling extra fatigued, sore, and/or you are not seeing your training translate into faster races.