The Female Athlete Checklist: 5 Health Risks Coaches and Parents Miss

She's the fastest kid on the pitch, she never misses practice, and her highlight reel is growing. Everything looks fine — until it isn't. A stress fracture that came from nowhere. A torn ACL on a routine cut. Unexplained fatigue that no amount of sleep seems to fix. These aren't bad luck. They're the predictable consequences of health risks that youth sport culture routinely ignores in female athletes. And the adults around her — coaches, parents, even some doctors — often miss the warning signs because nobody taught them what to look for.

This article covers the five most under-screened health risks facing female athletes today. Each one is backed by research, each one is identifiable without a medical degree, and each one comes with practical steps you can take this week. At the end, you'll find a printable screening checklist and conversation starters you can use immediately.

1. ACL Injury Risk: It's Not Random, It's Structural

Female athletes are 2 to 8 times more likely to tear their ACL than male athletes playing the same sport at the same level. That's not a typo. The disparity is one of the most well-documented findings in sports medicine, confirmed across soccer, basketball, volleyball, and lacrosse. The peak risk window hits between ages 14 and 18 — the exact years when competitive stakes ramp up and bodies are still developing.

The reasons are biomechanical: wider Q-angles at the hip, greater ligament laxity influenced by estrogen, and — critically — neuromuscular patterns that can be trained. Research from the American Journal of Sports Medicine shows that structured neuromuscular warm-ups reduce ACL injuries in female athletes by 50-70%. Yet fewer than 25% of youth programs implement them. Every female athlete on your roster should be running an evidence-based prevention protocol like FIFA 11+ or Sportsmetrics — and it only takes 15 minutes, three times a week, built into the warm-up you're already doing.

Action step: Watch your athletes land from a jump. If knees collapse inward, that's dynamic valgus — the movement pattern that tears ACLs. It's trainable. Start correcting it today.

2. RED-S: The Syndrome Hiding Behind "Dedication"

Relative Energy Deficiency in Sport (RED-S) replaces the outdated "Female Athlete Triad" and describes what happens when an athlete chronically consumes fewer calories than their body needs to support both training and basic biological function. The consequences cascade: hormonal disruption, bone density loss, increased injury risk, impaired immunity, declining performance, and long-term damage to cardiovascular and reproductive health. The IOC consensus statement on RED-S identifies it as one of the most significant health threats facing female athletes globally.

The dangerous part: RED-S athletes often look like your hardest workers. They train more. They restrict food and call it "eating clean." They lose weight and receive compliments. By the time a stress fracture or missed period triggers medical attention, the damage has been accumulating for months. Up to 45% of female athletes in lean-build sports show signs of low energy availability, according to research published in the British Journal of Sports Medicine .

Action step: If a female athlete has had a stress fracture, recurrent illness, or unexplained performance decline, screen for energy availability. Ask: "Are you eating enough to fuel what your body is being asked to do?"

3. Menstrual Cycle: The Vital Sign Nobody Tracks

In clinical medicine, the menstrual cycle is considered a vital sign — as important as heart rate and blood pressure. The American College of Obstetricians and Gynecologists has said so explicitly since 2015. Yet in youth sport, periods are barely discussed — and a missed period is often ignored or even celebrated as a sign that the athlete is "training hard enough."

Amenorrhea (missing periods) in a training athlete is not normal. It signals that the body is under-fueled and has shut down non-essential functions to survive. It means bone density is declining. It means estrogen — the hormone that protects bones, heart, and brain — has dropped to dangerously low levels. Every month without a period is a month of bone loss that may never be fully recovered.

Action step: Coaches don't need to track periods. But they do need to ...