Carbohydrates for Teen Athletes: A Guide to Fuel and Recovery

Carbohydrates, often called carbs, are one of the body's main sources of energy. They help fuel the brain, central nervous system, and working muscles. For active teens, carbohydrates are especially important because they support school, everyday movement, training, competition, and recovery.

This guide explains what carbohydrates are, how different types of carbs work, how much teen athletes may need, and how timing can affect performance and recovery.

What Are Carbohydrates?

Carbohydrates are essential nutrients. During digestion, the body breaks them down into simple sugars, mainly glucose [4,5]. Glucose can be measured in blood samples, commonly known as the “blood sugar level”. Glucose is a readily available source of energy during exercise and helps fuel the brain and central nervous system [8]. Each gram of carbohydrate provides about 4 kilocalories of energy [7].

Carbohydrates occur naturally in foods such as whole-wheat pasta and bread, fruits, vegetables, beans, and legumes. They are also added to foods and drinks such as soda, pastries, dairy desserts, and refined grains [5].

Types of Carbohydrates

Simple Carbohydrates

Simple carbohydrates are sugars. They include glucose, fructose, galactose, sucrose, maltose, and lactose [3,4,5]. The body can digest many simple carbohydrates quickly, which makes them useful when fast energy is needed before or during intense activity.

Food quality still matters. Fruit and dairy contain simple carbohydrates along with vitamins, minerals, and other nutrients. Foods and drinks with added sugar and little fiber may provide quick energy without the same nutrient value.

Complex Carbohydrates

Complex carbohydrates contain multiple sugar units bonded together. They generally take longer to digest and can provide a steadier release of energy.

·       Starch is found in whole grains, vegetables, fruits, beans, and peas. These foods can help support more sustained energy and fullness.

·       Fiber is an indigestible carbohydrate that supports digestion and gut health.

Are All Carbohydrates Equal?

Carbohydrates can differ in nutrient density, fiber content, and level of processing. Highly processed options, including sugar-sweetened drinks and many pastries, chips, and fast foods, may provide energy but fewer nutrients [3,5]. They can cause what is known as a “rapid spike in blood sugar”. They can fit into an athlete's diet, but they should not replace the whole-food carbohydrate sources that support daily health.

Sports drinks deserve specific attention. They can be useful during long or high-intensity activity, but they may add unnecessary sugar when consumed outside of exertion periods.

For regular meals and snacks, prioritize minimally processed sources such as whole grains, fruits, vegetables, beans, and legumes. These foods provide carbohydrates along with fiber, vitamins, and minerals [3,4].

How Many Carbohydrates Do Teen Athletes Need?

Carbohydrates should make up about 50 to 60 percent of a teen athlete's daily energy intake [1,6]. They should appear regularly across meals and snacks rather than being saved for one large meal.

Depending on training volume and intensity, teen athletes may need about 3 to 8 grams of carbohydrate per kilogram of body weight each day [9]. Needs can change between rest days, regular practice days, tournaments, and periods of heavy training.

Timing Carbohydrates Around Activity

Before Training or Competition

Carbohydrates before activity can help provide readily available energy. Simple carbohydrates, including a sports drink when appropriate, may be useful close to activity. High-fiber foods may need to be limited immediately before exercise if they cause stomach discomfort [2].

After Training or Competition

Carbohydrates are also important after activity. A carbohydrate-rich snack or drink within 30 to 60 minutes of exercise can help replenish glycogen stored in the muscles [1]. Pairing carbohydrates with protein can also support recovery.

Regular exercise may improve the body's ability to move glucose into working cells. This can help active people use carbohydrate efficiently during activity and daily life [3].

The Main Takeaway

Carbohydrates are a core part of performance and recovery for teen athletes. The goal is to consume enough high-quality carbohydrates across the day and adjust timing around training. Whole-food sources should form the foundation, while faster-digesting options can be used when the situation calls for quick energy.

Disclaimer

All content provided on this blog is for informational purposes only and is not intended to replace professional medical advice, diagnosis, or treatment. Always consult your physician or qualified healthcare provider with any questions you may have regarding a medical condition or nutritional needs. While all posts are reviewed for accuracy by VUUR's medical advisor, a board-certified pediatric gastroenterologist, VUUR is not responsible for any health issues that may arise from the use or misuse of the information presented. Use this content at your own discretion.

Citations

1. American Academy of Pediatrics. Carbohydrates for Energy. HealthyChildren.org. Last updated May 1, 2018. Accessed September 15, 2025. https://www.healthychildren.org/English/ages-stages/teen/nutrition/Pages/Carbohydrates-for-Energy.aspx

2. Braddock J. The Best Carbohydrates for Teen Athletes. Off-Season Athlete. Published March 9, 2020. Accessed September 15, 2025. https://offseasonathlete.com/best-carbohydrates-for-teen-athletes

3. Children's Hospital Colorado. Carbohydrates for Athletes. Published October 9, 2023. Accessed September 15, 2025. https://www.childrenscolorado.org/just-ask-childrens/articles/carbohydrates-for-athletes

4. Cleveland Clinic. Carbohydrates: What They Are, Function and Types. Last reviewed March 8, 2024. Accessed August 26, 2025. https://my.clevelandclinic.org/health/articles/15416-carbohydrates

5. Mayo Clinic Staff. Carbohydrates: How Carbs Fit Into a Healthy Diet. Mayo Clinic. Published January 24, 2025. Accessed September 15, 2025. https://www.mayoclinic.org/healthy-lifestyle/nutrition-and-healthy-eating/in-depth/carbohydrates/art-20045705

6. Nairn R. Nutrition for Athletes: What to Eat Before a Competition. Johns Hopkins Medicine. Accessed September 15, 2025. https://www.hopkinsmedicine.org/health/wellness-and-prevention/nutrition-and-fitness/nutrition-for-athletes-what-to-eat-before-a-competition

7. Purcell LK, Canadian Paediatric Society, Paediatric Sports and Exercise Medicine Section. Sport Nutrition for Young Athletes. Paediatr Child Health. 2013;18(4):200-205. doi:10.1093/pch/18.4.200.

8. Sacheck J, Schultz N. Optimal Nutrition for Youth Athletes: Food Sources and Fuel Timing. National Youth Sports Health & Safety Institute. 2016. Accessed May 30, 2025.

9. Smith JW, Holmes ME, McAllister MJ. Nutritional Considerations for Performance in Young Athletes. J Sports Med. 2015;2015:734649. doi:10.1155/2015/734649.