05:40 was only once (pb), but exceeded 5:15 quite a few times.
Has anyone ever used something like a ping pong ball or something bright that floats, and hold it in your hand while doing dynamics in a pool. At least the lifeguard could be warned ahead of time that if he/she sees the ball floating, there is a serious problem.
By the way, those apnea tables someone posted here, really work. I think I could break my P.B. with them, but never have enough time to work it up to 6 minutes. (can't wait!)
Jim
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