Lower, more consistent heart rate on morning runs vs evening | Uphill Athlete

Lower, more consistent heart rate on morning runs vs evening

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  • #28170
    doughywilson
    Participant

    I have noticed that my heart rate stays much lower on runs in the morning vs evening. When I run in the evenings, my heart rate is much more variable and spikes easier. I’ve logged a lot of data and have confirmed this through dozens of test runs. The question is why? Anyone else noticed this and have an explanation?

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