I've posted before about my college requiring incoming freshman to pass a swimming test naked. Apparently, nude male swimming was required elsewhere, too.
Monica Eng reports:
(the audio vision is more complete than the transcript)
https://www.wbez.org/shows/curious-c...5-0c4bf4d5a0be
Jumping off the starting blocks could hurt!
The invention of nylon Speedos made the whole thing unnecessary, but it was 20 years before nude swimming requirements disappeared from public schools thanks to Title IX.