What happens when a car runs out of gas? It stops. No matter how sleek or fast it looks, without fuel, it can’t go.
The same is true for the female athlete.
Too many young women in sport are running on fumes—training hard, chasing goals, and trying to “do it all” without giving their bodies enough energy to support basic functions, let alone peak performance. This is the silent reality of RED-S, or Relative Energy Deficiency in Sport.
And it’s more common than most coaches, parents, or athletes realize.
What is RED-S?
RED-S occurs when an athlete doesn’t eat enough calories to meet the demands of their sport and support normal body function. It’s not always intentional—it can happen without any signs of disordered eating. But over time, it disrupts nearly every system in the body.
Think of it like this: your body has to budget its energy. If it doesn’t have enough to go around, it starts cutting costs:
“Your body doesn’t care about performance if it’s just trying to survive.”
Key Warning Signs of Underfueling
RED-S can be tricky to spot because athletes often appear “fit” or high-performing… until they aren’t. Look for:
If you’re checking multiple boxes, it’s time to take action.
Who’s Most at Risk?
And yes, even middle and high school athletes can experience RED-S—often during growth spurts when energy needs are highest.
What to Do About It
Increase energy availability: This means eating more, not just differently. Focus on carbs, protein, and fats—consistently throughout the day.
Work with a team: A sports dietitian, physical therapist, and physician can help monitor recovery and return to sport safely.
Track menstrual cycles: Losing your period is a red flag—not a “normal” side effect of training.
Shift the mindset: Food isn’t something to fear. It’s what allows athletes to train, grow, and stay in the game.
“An underfueled athlete might look fine—until they break.”
Final Thought
We cannot allow RED-S to become the norm in female sports culture. A well-fueled body is a healthy, resilient, high-performing one. Energy is not optional—it’s essential.
Strong isn’t skinny. Strong is fed.
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Female athletes deserve training and care designed for how they move, grow, recover, and compete. At Architech Sports & Physical Therapy, we combine Athletic Performance Therapy with Sports Performance Training to help athletes build strength, reduce injury risk, improve confidence, and return to sport stronger.
From ACL prevention and movement assessments to speed, power, agility, and return-to-play support, our team helps female athletes train with purpose and perform at their best.
