Low heart rate during intense intervals

Feelings and metrics

Heart rate does not respond instantly. In short intervals it may remain low even when power is high.

Recommended steps

  • Do not expect heart rate to rise like power.
  • In short efforts, power and sensation matter more.
  • Check that the strap works properly.
  • Look at average heart rate for longer blocks if you want context.
  • If heart rate seems impossible or flat, review the sensor.
  • Do not draw big conclusions from one isolated metric.

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