• 20-30 seconds, max.

    Here's some data waiting for a purpose:

    Which came from this gentle run round my local park:

    https://www.strava.com/activities/477380990

    I suspect that the NIRS sensor didn't get a good look/something wasn't right until 14:30, as I doubt I was actually jogging along with 40% SMO2, but hey- who knows?

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