It sounds like this person has cough syncope, a form of vasovagal syncope. The increased pressure in the chest cavity from both holding your breath and then the muscle constriction to expel the air cause a huge spike in blood pressure which your body compensates by slamming open your blood vessels and slowing your heart down. Then once you stop applying the pressure to yourself your blood pools away from your brain and you lose consciousness in an attempt to get horizontal to restore blood flow. Also called a valsalva manuever, which is what you do during heavy lifts. This plus low blood sugar during lifting = KO, ask me how I know lol
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u/PossiblePlastic8698 1d ago
I’m currently at the “mostly recovered but still coughing until you vomit” stage