Nutrition for athletes covers how food and fluids support energy, training, recovery, and health. Students need this cheat sheet to make smart choices before, during, and after physical activity. It focuses on safe, practical habits for school sports, fitness classes, and personal training.
Good nutrition helps athletes perform better and lowers the risk of fatigue, cramps, and poor recovery.
The most important ideas are energy balance, macronutrient needs, fuel timing, hydration, and electrolyte replacement. Carbohydrates are the main fuel for moderate to intense exercise, while protein helps repair and build muscle. Fluids and sodium help maintain blood volume, body temperature, and muscle function.
Recovery works best when athletes replace fluids, eat carbohydrates, and include protein soon after hard activity.
Key Facts
- Energy balance means calories in from food and drinks should match calories used for growth, daily activity, exercise, and recovery.
- Carbohydrates provide 4 calories per gram and are the main fuel for moderate to high intensity exercise.
- Protein provides 4 calories per gram and supports muscle repair, immune function, and growth after training.
- Fat provides 9 calories per gram and supports long duration activity, hormones, and absorption of vitamins A, D, E, and K.
- A useful pre-workout meal 2 to 4 hours before exercise includes carbohydrates, moderate protein, low fat, and fluids.
- For activity longer than 60 minutes, athletes may benefit from 30 to 60 grams of carbohydrate per hour.
- A recovery snack or meal within 30 to 60 minutes should include carbohydrate plus protein, such as a 3:1 or 4:1 carb-to-protein ratio.
- A simple hydration check is urine color: pale yellow usually suggests good hydration, while dark yellow often suggests more fluids are needed.
Vocabulary
- Macronutrient
- A nutrient needed in large amounts that provides energy, including carbohydrates, protein, and fat.
- Carbohydrate
- The body's preferred fuel source for moderate to intense exercise, found in foods such as grains, fruit, milk, and starchy vegetables.
- Protein
- A nutrient used to repair and build body tissues, including muscle, after exercise.
- Electrolyte
- A mineral such as sodium, potassium, calcium, or magnesium that helps control fluid balance, nerve signals, and muscle contractions.
- Glycogen
- Stored carbohydrate in muscles and the liver that the body uses for energy during exercise.
- Recovery nutrition
- Food and fluid choices after exercise that replace energy stores, repair muscle, and restore hydration.
Common Mistakes to Avoid
- Skipping meals before practice is a mistake because low fuel can cause early fatigue, dizziness, and poor focus during activity.
- Eating a heavy, high-fat meal right before exercise is a mistake because fat digests slowly and can lead to stomach discomfort.
- Drinking only when extremely thirsty is a mistake because thirst can lag behind fluid loss during hard exercise or hot weather.
- Using energy drinks as sports drinks is a mistake because many contain high caffeine and sugar but may not provide the right fluid and electrolyte balance.
- Ignoring recovery food after hard training is a mistake because muscles need carbohydrates to refill glycogen and protein to repair tissue.
Practice Questions
- 1 An athlete eats a snack with 45 grams of carbohydrate. How many calories come from carbohydrate?
- 2 A soccer player trains for 90 minutes and aims for 30 to 60 grams of carbohydrate per hour. What is the recommended total carbohydrate range for the workout?
- 3 A recovery smoothie has 60 grams of carbohydrate and 20 grams of protein. What is the carbohydrate-to-protein ratio?
- 4 Explain why an athlete doing a long, hot practice may need both water and electrolytes instead of water only.