Racing is low-risk compared with wreck or night diving and still produces shoulder injuries and the occasional shallow-water spinal injury. Hypoxic underwater sets have killed trained swimmers.
This is orientation, not sports-medicine advice.
Hazards
- Shoulder overuse — The standard clinic presentation of the sport.
- Shallow racing starts — Some 25 m halls still have unsafe start depths; federations publish minimums.
- Hypoxic underwater repeats — A known fatal pattern. Not a VO2 hack.
- Eating disorders and weight talk — A documented culture risk in aesthetic-adjacent endurance sport.
- Deck slips — Sprinting to a heat in socks.
- Asthma and chloramines — Poor air handling in old halls.
Rules
- Respect start-depth rules — If the meet forbids starts at one end, that is a spinal rule.
- No underwater breath-hold games — Coaches who programme them need a different chapter.
- Report pain early — A week off beats a season of impingement — clinician, not this page.
- Follow warm-up traffic rules — Head-up when merging.
- Safeguarding — Youth sport requires the federation’s chaperone and photo rules.
Red flags
- Sudden shoulder night pain — Stop paddles; see a clinician.
- Chest tightness in a chloramine fog — Exit; tell staff. Not a diagnosis.
- Dizziness after underwater work — End the set. End the fashion.
- A coach who mocks DQs as “cowardice” — Leave the programme.
First response
- Spinal suspicion after a start — Do not “walk it off.” Guards and emergency services.
- Cramp — Stop, wall, stretch — not a medical protocol page.
- Not medical advice — Cardiac and concussion decisions are clinical.
The sport’s danger is mostly cumulative and cultural, not cinematic. Treat underwater contests as a different, dumber sport.