Mere's Third Metatarsal: Welfare, Load and the Scholarship
Mere, 16, is a national age-group 3000 m runner. She trains eleven sessions and about 85 km a week on top of senior PE, and has been deliberately losing weight since a coach told her that 'lighter is faster'. At a school screening her BMI is 17.8. She has had two stress fractures in fourteen months: a tibial fracture last season and now a third metatarsal. Her periods stopped eight months ago. She reports feeling cold constantly, has had two chest infections this winter, and skips lunch 'because training is easier on an empty stomach'. Her coach argues that the regional championships in three weeks are 'the pathway to a US scholarship' and has asked the sports coordinator to sign the permission form. Mere's parents defer to the coach, who has trained two previous national representatives. Mere says she doesn't want to 'let anyone down'.
1. Identify the clinical red flags, name the condition, and explain the physiological pathway linking low energy availability to bone injury and menstrual dysfunction.
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Red flags. Recurrent stress fractures at two sites within fourteen months (recurrence, not the site, is the alarm); BMI 17.8; secondary amenorrhoea of eight months; intentional weight loss driven by an external instruction; cold intolerance; two infections in one winter; restrictive eating around training; a training load of eleven sessions and 85 km/week at 16; and a psychological profile of compliance and fear of letting others down. No single item is diagnostic. The cluster is.
Condition. Relative Energy Deficiency in Sport (RED-S), the current, broader formulation of what was called the Female Athlete Triad. It is a syndrome of impaired physiological function caused by low energy availability (LEA) - energy intake minus exercise energy expenditure leaving insufficient energy for normal body function.
Pathway to amenorrhoea. LEA is detected centrally as a metabolic stress signal. Hypothalamic GnRH pulsatility is suppressed, lowering LH and FSH, so oestradiol falls and ovulation stops. This is functional hypothalamic amenorrhoea - not a 'normal athlete thing', and not something that resolves on its own while LEA persists.
Pathway to fracture. Oestrogen deficiency removes a brake on bone resorption while cortisol excess and suppressed IGF-1 and T3 impair bone formation. In an adolescent still accruing peak bone mass, this is a double hit: the bone she lays down now determines her fracture risk for life, and that window does not reopen. Combined with high repetitive loading, the result is exactly what has happened - recurrent stress fractures. Reduced immunity (hence the chest infections) and impaired glycogen storage and protein synthesis run on the same mechanism.
Critical caveat: BMI is not the diagnostic. LEA occurs at normal BMI too. The judgement rests on the injury and menstrual history, and BMI 17.8 corroborates rather than proves it. Menstrual function should be treated as a clinical vital sign in any athlete screening programme.
2. Analyse the decision using ethical reasoning - duty of care, autonomy, non-maleficence and the coach's influence - and identify who holds responsibility.
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Duty of care. The school, the coach and the parents all owe Mere a duty. The duty is not discharged by obtaining a signature; a signature from parents who defer to the coach does not transfer the school's independent obligation.
Non-maleficence. Signing creates a foreseeable risk of a third fracture, possible career-ending bone damage, and harm to her long-term health. Competing creates a foreseeable risk of disappointment and of damage to the coach relationship. These are not symmetrical: a missed race is reversible, a fracture during the peak bone accrual window may not be.
Beneficence points the same way - the best available way to protect her stated goal (a US scholarship) is to restore energy availability and bone health, because recurrent injury is the far bigger threat to that goal than missing one regional final.
Autonomy is the hard one. Mere is 16, so her autonomy is developing and her consent is meaningful but not decisive. More importantly, her expressed preference - 'I don't want to let anyone down' - is not a free choice; it is produced by a relationship in which the coach controls access to the pathway she wants. Treating that as informed consent mistakes compliance for autonomy. Genuine autonomy support means giving her real information, real options, and time without the coach in the room.
Power. The coach holds a real material stake (the scholarship pathway) and two prior national representatives' worth of credibility. The parents' deference is rational, not negligent - they lack the information to contradict him.
Responsibility is distributed: the coach for load and messaging, the school for the permission process and for the senior PE load it adds, the NSO for load guidance, the health system for the missed menstrual history, and the coordinator as the person with the decision in front of them. Distributed responsibility is exactly how this happens - everyone owns a share, so no one acts.
3. What should the sports coordinator do in the next 72 hours, and what institutional safeguards would prevent recurrence?
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Next 72 hours.
- Do not sign the form. The immediate decision is to withhold permission pending medical clearance. Say so early and in writing, so the absence of a signature is not mistaken for delay.
- Speak to Mere first, alone, and listen. The conversation must not be 'you are being stopped'. It must be 'here is what I am worried about, in plain language, and here is why it is about your running, not against it'. If she experiences this as punishment she will hide symptoms next time.
- Refer, don't diagnose. GP or sports physician the same week, requesting assessment of energy availability, menstrual function and bone health (including DXA where indicated), and endocrine input. The coordinator's job is the referral, not the diagnosis.
- Inform the parents in writing, with the referral and the reasoning, and offer to attend the appointment with them. Restate that this is about protecting the scholarship goal, which is the language the family responds to.
- Inform the coach in writing, copying the Head of Sport, with the reason and the referral. Do not negotiate it as a difference of opinion; it is a medical safety decision.
- Notify the DP or wellbeing lead and log the decision. If the coach escalates or exerts pressure on Mere directly, there is a record and an escalation path.
- Offer a supported plan: a documented return-to-play pathway with a target date and criteria so the coach and athlete have something to work toward rather than only a refusal.
Safeguards. A written training-load and athlete-welfare policy for student athletes, jointly signed by athlete, whānau and coach. Routine screening of menstrual function and injury history at the start of each season. Education for coaches on RED-S and adolescent load, delivered by the NSO rather than the school alone. A rule that out-of-school competition permission requires the coordinator to be satisfied about the athlete's health, not merely to have a parent's signature. And a review of senior PE loading, since the programme is part of her weekly total. The test of the safeguards is not whether they satisfy the coach, but whether the next 16-year-old discloses earlier.