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Does surprise me, with margins so insanely fine, that they run with jewellery, long hair etc
You'd have thought they'd want to be as light/streamlined as possible - could an earring cause 0.005s of drag?
I noticed a lot of female swimmers had multiple earrings and wondered the same (but from an aerodynamic perspective). You'd think their pre race planning and prep would be down to a nano tee given the margins involved.

