I was never a very good swimmer, afraid of the water up to the age of nine.
So took up subAqua later in life.
Most I would swim would be 1 mile a week one visit, swam in the same lane as a ultraendurance Swimmer.
He swam crawl I never progressed beyond Sidestoke.
Got some very basic tuition and moved on to the crawl, Within a short while I could match pace of the ultraendurance Swimmer, but only for one Length, I had to copy his style exactly.
But I don't float very well, hence me never liking it that much.
Developed artery thrombosis whilst in hospital, Several years later and operation to correct a blockage, 30 years later it has returned.
On leaving hospital having a drink with my mate, I hold my breath for three minutes 20 seconds .
Elevated hempcrate level (Like Doping) no doubt, Direct result of splenectomy.
I should've been on blood thinner, although 35 years ago nearly 40 the problem was not well known.
even today you can be overlooked by the medical profession. https://jaoa.org/article.aspx?articleid=2094480
(Typed with speech, auto spelling and Grammar a bit dumb)