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 accidentally 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.
Get your Iron/Ferritin checked prior to each season. Talk to your doctor if you are vegan or vegetarian, you might need to supplement.
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.