Nutritional Guide for High School Distance Runners
Science-based nutrition framework for high school distance runners covering calorie and macro requirements, food choices, meal timing, hydration, and electrolyte management. Emphasizes real food consistently and avoiding RED-S.
Fuel to Win. Eat to Recover.
For athletes ages 14–18, the blueprint for recovery is grounded in real science and zero fluff, built for the next generation of fast runners.
Section 1: Calories and Macros
Think of calories as the fuel your engine runs on. A car that runs out of gas stops. A distance runner that’s under-fueled stops just as completely—and under-fueling is the #1 mistake young athletes make.
Distance runners burn significantly more fuel than non-runners their age. Most need between 2,200–3,500 calories per day depending on body size, age, gender, and weekly mileage.
Macronutrient Split for Distance Runners
- Carbohydrates: 55% — Primary running fuel. Fills muscle glycogen stores. On hard training days, aim for 6–8g per kg of body weight.
- Protein: 20% — Repairs muscle tears from training. Builds strength. Target 1.4–1.7g per kg of body weight.
- Fat: 25% — Slow-burning backup fuel. Supports hormones, brain, joints.
Why so many carbs? When you run, your muscles burn glucose from carbohydrates. Without enough carbs, you “bonk”—legs feel like concrete after mile 2. Carbs are your primary race fuel. Don’t be afraid of them.
Warning: Under-Fueling Is Dangerous
Eating too little causes stress fractures, hormonal disruption (especially female athletes), mood problems, iron deficiency, and tanked performance. RED-S (Relative Energy Deficiency in Sport) happens when an athlete consistently burns more calories than they consume.
If an athlete is losing weight without trying, tell a coach or parent immediately.
Section 2: What to Eat
Good nutrition isn’t complicated. It’s mostly about eating real food, consistently. Build your plate around these categories:
Carbohydrates — Fill Half Your Plate
| Food | Why It Works | Best Time |
|---|---|---|
| Oatmeal | Slow-burning fuel, steady blood sugar | Breakfast, pre-run |
| White or brown rice | Easy to digest, fast glycogen loading | Pre-run, dinner |
| Pasta | High carb density, easy to prepare | Night before race |
| Bread / bagels | Portable, practical | Any time |
| Bananas | Fast carbs + potassium, easy on stomach | Pre-run snack |
| Sweet potatoes | Carbs + Vitamin A + potassium | Dinner |
| Fruit (berries, oranges, apples) | Carbs + antioxidants, reduce inflammation | Snacks, recovery |
Protein — A Portion at Every Meal
| Food | Why It Works | Best Time |
|---|---|---|
| Chicken / turkey breast | Lean, high-quality protein | Lunch, dinner |
| Eggs | Cheap, complete protein, fast | Breakfast, any time |
| Greek yogurt | Protein + calcium + probiotics | Breakfast, recovery snack |
| Chocolate milk | 4:1 carb-to-protein ratio, ideal post-run | Within 30 min after running |
| Tuna / salmon | Protein + omega-3s, reduce inflammation | Lunch, dinner |
| Beans & lentils | Plant protein + iron + fiber | Any meal |
| Milk / cheese | Protein + calcium, critical for growing bones | Any time |
Healthy Fats: Don’t Avoid Them
| Food | Why It Works |
|---|---|
| Avocado | Healthy monounsaturated fat + potassium |
| Peanut butter / almond butter | Fat and protein together |
| Nuts & seeds | Portable snack; fats + magnesium |
| Olive oil | Anti-inflammatory omega-9 |
| Salmon / sardines | Omega-3s accelerate muscle recovery |
Avoid Before Races: Fried food, heavy greasy meals, soda, energy drinks, raw fiber (salads, raw broccoli) within 2 hours of running. These cause stomach cramps, bloating, or energy crashes mid-race.
Section 3: When to Eat
Nutrition timing is almost as important as what you eat. Your body needs time to convert food into usable fuel.
3–4 Hours Before Practice or Race
Your Main Pre-Run Meal: A full, carbohydrate-heavy meal with moderate protein and low fat. Your body has time to fully digest and store energy as glycogen in muscles.
- Pasta
- Rice + chicken
- Sandwich
- Oatmeal + eggs
1–2 Hours Before
Light Top-Off Snack: Only smaller, easy-to-digest foods. Keep fat and fiber low. You want simple carbs that absorb quickly.
- Banana
- Toast + peanut butter
- Crackers
- Granola bar
30–60 Minutes Before
Water Only: No solid food. Your digestive system competes with your muscles for blood flow during exercise. Eating too close causes cramps and nausea.
Within 30 Minutes After Finishing
The Recovery Window: Most Important: This is when muscles are like a sponge, absorbing carbs and protein faster than at any other time. Miss this window and recovery is significantly slower.
Target a 3:1 or 4:1 carb-to-protein ratio:
- Chocolate milk
- Greek yogurt + fruit
- PB&J sandwich
- Recovery shake
1–2 Hours After
Full Recovery Meal: Complete, balanced meal with carbs, protein, vegetables. Replenish everything you burned.
Race Day Rule
Never try new foods on race day. Your pre-race nutrition routine must be practiced in training first. Find what works for your stomach and repeat it exactly. The worst race-day stories almost always involve someone who “tried something different.”
Section 4: Hydration
Your blood is mostly water. It carries oxygen from your lungs to working muscles. When you’re dehydrated, your blood thickens, your heart works harder, your pace drops, and you feel terrible.
Even 2% dehydration reduces performance by 10–20%.
By the time you feel thirsty, you’re already behind. Hydration is a daily habit, not something you catch up on an hour before practice.
Daily Hydration Targets
- Before Practice: 16–20 oz, 2 hours before
- During Running: 6–8 oz every 15–20 minutes
- After Practice: 20–24 oz for every pound of bodyweight lost to sweat
- Full Day Goal: 80–100 oz on hard training days (~2.5–3 liters total)
Real-Time Hydration Check: Urine Color
| Color | Status |
|---|---|
| Clear | Possibly over-hydrated—ease up slightly |
| Pale Yellow | You’re well hydrated. This is the target. |
| Yellow | Getting behind—drink a glass now |
| Dark Yellow | Dehydrated—drink 16 oz immediately |
| Brown / Orange | Severely dehydrated—tell your coach now |
Hot Weather: Heat + humidity dramatically increases sweat rate. On hot race days, start loading water the day before. Drink an extra 20 oz in the morning before an afternoon meet. Your body cannot catch up on hydration in the last hour.
Section 5: Electrolytes
Electrolytes are minerals in your blood that carry electrical signals—they keep your muscles firing, your heart beating in rhythm, your nerves communicating with your brain. When you sweat, you lose them.
Think of electrolytes like spark plugs in an engine. Even a full tank won’t fire correctly without them. Drinking plain water during a long run replaces fluid but does nothing to replace the minerals your muscles need.
Key Electrolytes
| Mineral | Function | Sources |
|---|---|---|
| Sodium | Most important sweat loss. Helps retain water and drives fluid balance. | Sports drinks, pretzels, salty crackers, pickles, table salt |
| Potassium | Works with sodium to control muscle contraction. Low levels = cramping. | Bananas, potatoes, orange juice, avocado, sweet potato |
| Magnesium | Muscle relaxation, sleep quality. Low levels cause cramping and poor recovery. | Nuts, seeds, leafy greens, dark chocolate, whole grains |
| Calcium | Muscle contractions + bone density. Critical for growing athletes under training load. | Milk, yogurt, cheese, fortified OJ, broccoli |
When to Use Sports Drinks vs. Water
| Situation | Water Enough? | Use Sports Drink? |
|---|---|---|
| Easy run under 45 min, mild weather | Yes | Not necessary |
| Hard workout 60+ minutes | Not ideal | Yes—sodium + carbs needed |
| Hot and humid (80°F+) | Not ideal | Yes |
| Race day (any distance) | Supplement only | Yes |
| Two workouts in one day | No | Yes—both sessions |
Cramp Fix: If you cramp consistently mid-race, sodium is usually the problem. Plain water without sodium actually dilutes remaining sodium—making cramping worse. The fix: saltier foods the day before and morning of a race, plus a sports drink (not plain water) during events over 45 minutes.
Related:
– 7-Day Runner Meal Planner
– Runner Nutrition Calculator
– Pre-Race Nutrition Calculator
– Coaching High School Distance Runners