Case Study 2 — Making Weight: The Practice Sport Regulates and Nobody Fixes

A composite clinical case. ⚠️ The physiology, the documented harms, the governing-body rule changes and the practices described are real; the athlete is constructed. ⚠️ This case study describes dangerous practices in order to explain why they are dangerous. It is not a protocol.**

Setup

Tomas Berhane is 22, competes in a weight-category combat sport, and walks around at about 79 kg.

He competes at 70.

He has done this eleven times. He described the process to me in the flat, procedural way people describe things they have stopped finding remarkable:

"Water load for four days, cut it Thursday. No carbs, no fibre, no salt from Wednesday. Sweat the last two or three off Friday morning — bath, suit, whatever it takes. Weigh in Friday evening. Then you've got about twenty hours to get it all back."

⚠️ He is describing acute dehydration of roughly 5–8% of body mass, deliberately induced, followed by competition.

And I want to be clear about the frame before anything else: ⚠️ he is not doing something unusual. He is doing what his sport does, what his coach did, and what his opponents are doing.

What's actually happening, in three stages

Stage 1: chronic — the weeks before

A sustained energy deficit to lose 4–5 kg of actual tissue.

⚠️ Tomas does this five or six times a year. That is not a diet; it is a way of living.

Stage 2: acute — the last 72 hours

This is where the danger concentrates, and none of it removes fat.

⚠️ Deaths have occurred. Collegiate wrestling in the United States saw a cluster of deaths in the 1990s associated with rapid weight loss practices, which prompted rule changes — minimum weight certification, hydration testing, restrictions on dehydration methods, and limits on weekly weight loss. Similar reforms have followed in other combat sports, unevenly.

Stage 3: the 20 hours after weigh-in

Refeeding and rehydration, against the clock.

⚠️ And this is the part that is genuinely uncertain: recovery is incomplete. Plasma volume, muscle glycogen and neuromuscular function do not all return in twenty hours — and the shorter the window, the less returns. Some sports weigh in two hours before competition, which makes acute cutting far less viable and is, not coincidentally, a deliberate rule design.

What it costs him, measurably

Tomas came in because of something that had nothing to do with weight.

"I'm getting sick constantly and my grip's gone. I can't hold anyone in the third round any more."

⚠️ He had attributed all of it to "the sport being hard."

💡 Aha moment. ⚠️ He had never once competed in a rested, fully-fuelled state.

Eleven competitions, every one preceded by weeks of restriction and days of dehydration.

So he had no baseline. He literally did not know what he could do — which means the assumption underneath the whole practice, that competing lighter makes him better, had never been tested by him or anyone else.

What changed

⚠️ Not "stop cutting weight." He was not going to, his sport is organized around it, and an all-or-nothing recommendation would have ended the consultation.

Instead — harm reduction, in the order the evidence supports:

1. ⚠️ Move up a category. The largest single intervention, and the one he resisted hardest. He walks at 79 and competes at 70; the next category up is a 4 kg cut instead of 9. ⚠️ The argument that worked was not health — it was that he'd be competing fuelled against opponents who weren't.

2. ⚠️ Eliminate active dehydration entirely. No sauna, no sweat suits, no hot baths. This is the practice with the documented deaths and it contributes nothing that a longer, slower cut doesn't.

3. Extend the timeline. ⚠️ Weight loss of no more than ~0.5–1% of body mass per week, starting earlier, so more of the loss is tissue and less is acute.

4. Protect lean mass during the deficit. ⚠️ Protein to ~2.2 g/kg (§23.6) and keep training heavy — the two interventions that work.

5. Use the low-hanging acute weight. ⚠️ Gut content and glycogen water are 2–3 kg and are far less harmful than dehydration. Low residue and carbohydrate depletion for the final 48 hours, then aggressive refeed.

6. Fix the iron (Chapter 14) and address the five illnesses, which are an energy availability story (§23.2).

7. ⚠️ And get a bone density assessment, because eleven cycles is a cumulative exposure nobody had counted.

Eight months later

He moved up.

What he said:

"I thought I'd get beaten by bigger guys. Turns out most of them are as wrecked as I used to be."

⚠️ That sentence is a real strategic observation and it is also the reason the practice persists: everyone believes the cut is buying them an advantage, and everyone is partially cancelling it out.

Analysis

1. ⚠️ None of the acute phase removes fat. It removes water and gut contents, and it is reversed within a day. The only durable part is the chronic deficit.

2. Active dehydration is the practice with documented deaths, and ⚠️ it contributes nothing a slower cut doesn't. It is the first thing to remove and the easiest.

3. ⚠️ Recovery in 20 hours is incomplete, and shorter windows are worse. Weigh-in timing is a rule design choice that changes the incentives more than any education campaign.

4. He had no baseline. ⚠️ Eleven competitions, never once rested and fuelled. The premise had never been tested.

5. The argument that moved him was competitive, not medical. ⚠️ Which is worth noticing: in a population selected for tolerating discomfort, health arguments underperform — and Chapter 17 §17.13's "compare, don't debunk" applies directly.

6. ⚠️ Nobody had counted the cumulative exposure. Eleven cycles of low energy availability with no bone assessment.

7. And this is a sport-culture problem with a governing-body solution. ⚠️ Minimum weight certification, hydration testing at weigh-in, and same-day weigh-ins change behaviour; telling individual athletes to be careful does not.

Discussion Questions

1. ⚠️ Everyone cuts, so everyone is partially cancelling the advantage out. Model this as a collective action problem. What rule change breaks it, and why hasn't every sport adopted it?

2. The argument that worked was competitive, not medical. ⚠️ Is it acceptable to use a performance argument to achieve a health outcome? Where's the line between framing and manipulation?

3. ⚠️ He'd never competed rested and fuelled — no baseline. How would a sport generate that evidence? Design the study, and say who would consent to be in the control arm.

4. Harm reduction rather than abstinence. ⚠️ Defend that choice. Then argue the opposite — that a clinician endorsing any part of this legitimizes it.

5. ⚠️ Rule changes followed deaths in collegiate wrestling. Why does it take deaths? What would a preventive version look like, and what would it cost?

6. This case sits next to Chapter 34. ⚠️ Where is the boundary between sanctioned weight-making and disordered eating? Does the sanction make a difference to the physiology? To the psychology?

Your Turn

⚠️ This section is for athletes in weight-category or aesthetic sports, and for anyone who coaches them.

Step 1 — Count the exposure. ⚠️ Nobody does this and it is the most revealing number available.

Competitions per year: _ · Typical cut size: _ kg (____% of body mass) ⚠️ Cuts in the last five years: ____ Weeks per year in energy deficit: ____

Step 2 — Separate the acute from the chronic.

⚠️ The third row is the one to drive to zero.

Step 3 — The baseline question:

⚠️ "Have I ever competed rested, fully fuelled and fully hydrated?" ____

If no — how do I know the cut is buying me anything?

Step 4 — The screen (§23.2 and §23.13):

• [ ] Recurrent illness · [ ] Bone stress injury · [ ] Menstrual disturbance · [ ] Persistent fatigue · [ ] Poor sleep · [ ] Low ferritin · [ ] Mood change in cut weeks · [ ] Anxiety about eating with others · [ ] Preoccupation with food · [ ] Using exercise to "earn" food

⚠️ Two or more: this is a clinician conversation. Chapter 34.

Step 5 — And for coaches, the one that costs nothing:

⚠️ Stop commenting on athletes' bodies.

It is a documented risk factor, it is named as one by governing bodies and the IOC consensus material, and it is the intervention available to you today at zero cost — which is more than can be said for anything else on this page.