What Teen Athletes Actually Need to Fuel Performance | Teen Fueling Guide
Your teen comes home from practice exhausted, again. They felt dizzy during intervals, they're too tired to finish homework, and they're not hungry at dinner. Maybe you think this is just what being a student-athlete looks like, or that pushing through fatigue is part of getting better.
As a parent, you want to support your teen athlete, but the nutrition advice out there is confusing and often contradictory. Your teen's fueling needs are vastly different from adult athletes. Their body is in a critical stage of growth and development while also training at high intensity, creating unique energy demands that go far beyond what most people realize. When their energy runs low, the consequences show up in ways that go far beyond performance.
In this guide, you'll learn what your teen actually needs to perform and recover, why the fueling advice you've heard might be missing the mark, and how to help them build a sustainable relationship with food that supports both performance and well-being.
Why Teen Athletes Are Different
Right now, your teen's body is simultaneously building peak bone mass (90% is acquired by age 18) [1], growing in height and muscle, and training hard. For female athletes, they're also developing their reproductive system, which requires specific energy availability. These concurrent processes create energy demands that far exceed what the body needs just to maintain itself.
Here's the frustrating part: most sports nutrition research has been conducted almost exclusively on male participants. A 2022 audit of nearly 2,000 sports science studies found that women accounted for only 23% of total participants, and of the studies that did include women, 86% made no attempt to account for menstrual cycle or hormonal contraceptive use [4]. This means much of the nutrition advice circulating in youth sports wasn't designed with all athletes in mind, especially not female teens.
When the Body Doesn't Get Enough
When your teen consistently burns more energy than they take in, their body enters what researchers call Relative Energy Deficiency in Sport, or RED-S. This isn't just about feeling tired, it's a cascade of consequences that can affect everything from bone health and immune function to mood [2]. For female athletes, this can also include menstrual cycle changes.
The tricky part? These consequences often don't show up immediately. Your teen might even see short-term performance gains before problems appear, which is why under-fueling can accidentally feel like it's working. For a deeper look at how RED-S develops and what to watch for, we have a comprehensive guide here.
Research shows that adolescent athletes who sleep less than 8 hours have significantly higher injury rates [3]. When combined with inadequate fueling, the risk increases further [2]. For all athletes, stress fractures, frequent illness, and performance decline aren't just bad luck, they're often red flags that the body is running on empty.
The Diet Culture Problem
Let's talk about something that makes fueling even more complicated: the messages your teen is probably getting about food and their body.
Your teen has likely absorbed messages from social media, teammates, or even well-meaning coaches that equate being leaner with performing better. Maybe they've heard comments about what or how much other athletes eat. Maybe they've been told that certain foods are "bad" or that they should "watch what they eat." Maybe they've noticed which athletes get praised and which bodies get criticized.
Diet culture in sports is everywhere, and it sends confusing messages: that thinner always equals faster, that food is something to control rather than enjoy, that hunger signals can't be trusted, and that worth as an athlete is tied to how the body looks. These messages often contradict each other and contradict what the body actually needs.
If your teen seems confused, anxious, or guilty about eating, it's not their fault. They're navigating a lot of noise, and much of it isn't grounded in science or in what actually supports long-term performance and health.
Here's what research actually shows: the leanest athletes aren't necessarily the fastest or most successful. Athletes who eat enough to support their training consistently outperform those who under-fuel. What determines success isn't body composition, it's energy availability, mental resilience, and ability to recover.
What Proper Fueling Actually Looks Like
Your teen athlete likely needs 2,500-4,000+ calories per day, depending on their training volume, body size, and sport [5]. That's not a typo, and some athletes training at very high volumes need even more. While every athlete's fueling needs are unique, the ranges below are starting points based on research, and individual needs depend on training volume, body size, growth rate, sport demands, and metabolism.
Here's what those calories should include:
Carbohydrates (6-10 grams per kg body weight) as the primary fuel source [5]. This is what powers training and helps with recovery. Think: oatmeal, rice, pasta, bread, fruits, and starchy vegetables.
Protein (1.4-2.0 grams per kg) for muscle repair and growth [5]. Spread this throughout the day: breakfast, lunch, dinner, and snacks. Sources include eggs, Greek yogurt, chicken, fish, beans, and protein powder.
Healthy fats (20-35% of total calories) for hormone production, brain function, and nutrient absorption [5]. Think: avocados, nuts, nut butters, olive oil, and fatty fish.
Key nutrients like calcium (1,300mg/day), iron (15mg/day), and vitamin D for bone health, energy production, and immune function [6].
In practice, this means your teen eating breakfast every day, even before early practices, plus regular meals and 2-3 snacks, with fueling strategically around training.
As parents, model this yourself. Our own Dr. Erin Ayala starts every day with protein pancakes—not because they're "perfect," but because they're something she enjoys, they fuel her morning, and they've become a consistent, sustainable part of her routine. That's what good fueling looks like: nourishing, practical, and actually enjoyable.
The Sport Psychology Connection
Fueling isn't just about physical health, it's deeply connected to mental well-being and performance. When your teen learns to tune into their body's signals rather than override them, they develop better decision-making, catch problems before they become injuries, and build self-trust.
This is where intuitive eating becomes protective. Research shows that athletes who develop a flexible, permission-based relationship with food (rather than rigid rules and restriction) have lower rates of disordered eating, better psychological well-being, and more sustainable eating habits. Learning to honor hunger, recognize fullness, and eat for both fuel and pleasure builds resilience that extends far beyond sport.
It's worth noting that menstrual irregularities affect an estimated 13-60% of female athletes [4], yet these athletes are almost completely absent from supplement and nutrition research. This means standard recommendations may not account for the unique needs of this significant population.
Practicing self-compassion around food and the body also equips teens to handle the inevitable challenges of training, recovery, and performance. When the inner critic shows up with judgments about eating or body changes, self-compassion offers a way to stay grounded without spiraling into shame or restriction.
What Parents Can Do
If you're reading this, you probably already sense something feels off. Trust that instinct, your teen's body is trying to tell you something important.
Watch your language around food and bodies.
Avoid commenting on portion sizes, body changes, or labeling foods as "good" or "bad." Stock the kitchen with a variety of foods and let your teen eat when they're hungry, even if it's not "mealtime." The messages you send about food and bodies matter more than you might realize.
Build their support team.
Your teen might benefit from working with a sports medicine physician who understands RED-S, a sports dietitian who specializes in athletes, and a sport psychologist (like Skadi) who gets the unique pressures they face. Elite athletes have whole teams supporting them for a reason, and your teen deserves that same support.
Notice the messages around them.
Pay attention to how coaches, teammates, and other adults talk about food and bodies. Comments about portions, body size, or "good" versus "bad" foods often aren't based in science, but diet culture. Your teen deserves accurate, compassionate information that actually supports their goals.
Honor their hunger.
If your teen is hungry between meals or after practice, encourage them to eat. Their body isn't trying to trick them or sabotage them, it's communicating what it needs to help them perform, recover, and grow. Learning to listen to and trust those signals is a skill that will serve them far beyond sport.
Watch for warning signs.
If you notice skipping meals, excessive exercise beyond what's prescribed, frequent injuries, or for female athletes, a lost or irregular period, approach the conversation with curiosity and care, not judgment. Early intervention leads to better outcomes, and seeking professional support isn't overreacting, it's exactly what your teen needs.
When to Get Support
If your teen is struggling with their relationship with food, feeling constantly exhausted, or if something just feels off, don't wait. Early intervention leads to better outcomes, and getting help doesn't mean failure. It means you're taking their performance and health seriously.
At Skadi Sport Psychology, our sports-informed therapists and athletic coaches specialize in helping teen athletes and their families navigate these challenges. We understand the unique pressures teen athletes face and can work collaboratively with medical providers and coaches to support sustainable performance and long-term health. Schedule a free discovery call to learn how we can support your family.
References
[1] Loud, K. J., & Gordon, C. M. (2006). Adolescent bone health. Archives of Pediatrics & Adolescent Medicine, 160(10), 1026-1032. https://doi.org/10.1001/archpedi.160.10.1026
[2] Mountjoy, M., Sundgot-Borgen, J., Burke, L., et al. (2018). IOC consensus statement on relative energy deficiency in sport (RED-S): 2018 update. British Journal of Sports Medicine, 52(11), 687-697. https://doi.org/10.1136/bjsports-2018-099193
[3] Milewski, M. D., Skaggs, D. L., Bishop, G. A., et al. (2014). Chronic lack of sleep is associated with increased sports injuries in adolescent athletes. Journal of Pediatric Orthopaedics, 34(2), 129-133. https://doi.org/10.1097/BPO.0000000000000151
[4] Smith, E. S., McKay, A. K. A., Kuikman, M., et al. (2022). Auditing the representation of female versus male athletes in sports science and sports medicine research: Evidence-based performance supplements. Nutrients, 14(5), 953. https://doi.org/10.3390/nu14050953
[5] Thomas, D. T., Erdman, K. A., & Burke, L. M. (2016). American College of Sports Medicine Joint Position Statement: Nutrition and athletic performance. Medicine & Science in Sports & Exercise, 48(3), 543-568. https://doi.org/10.1249/MSS.0000000000000852
[6] Golden, N. H., Abrams, S. A., & Committee on Nutrition. (2014). Optimizing bone health in children and adolescents. Pediatrics, 134(4), e1229-e1243. https://doi.org/10.1542/peds.2014-2173
