we did a few trials with the fingertip oximeter in between times at the Mavericks pool competition on Sunday. We found that the only way to see any significant real drop was to do exhale statics - where it dropped into the 80s after about a minute but no lower before everyone gave up.
I'm going to take it out to Hurghada and see if the UK team can find a good use for it/break it/make up some stories using it.... more here after that.
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