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Your heart rate through a dance session

Ongoing studyRecorded through full sessions

This is an ongoing study. The figure will be updated here as more people are recorded.

OPTICAL

Accuracy

90.2%

Dance Heart Rate Agreement

against an ECG chest strap worn for the same dancing

Reference standard

ECG chest strap

Sample size

4 participants

Through a session the Ultrahuman Ring reads within twelve beats a minute of an ECG chest strap, on average.

Ultrahuman RingECG chest strapbeats per minute
90.2%agreement with the chest strap
11.2 bpmaverage difference
62%of readings inside the ±5 bpm / 10% tolerance
76–153beats per minute the reference covered in study
Figure 1 — One continuous stretch from a single recording. The figures beside it are for the study as a whole, not for the stretch drawn.
-75-50-250+25+50+75708090100110120130140150upper limit of agreement (+30.6)lower limit of agreement (-24.6)average offset +3.0 bpmthe two devices averaged (beats per minute)ring minus chest strap (beats per minute)
Figure 2 — Every five seconds, against the chest strap
One dot is one paired five-second reading, as recorded, pooled across recordings.

Dancing puts together the two conditions optical sensors handle worst: a high heart rate and continuous, irregular arm movement. There is no cadence to model, because the point of the movement is that it keeps changing.

It is also unusually hard to measure fairly. A dance session has no flat stretches to retreat into — the effort is elevated from early on and stays there — so there is nowhere in the recording for a number to hide.