In all fairness, we also had some identical readings during our pilot testing of blood lactate analyzers today.

More to come in 2025!

2/2

Above or below threshold?

Simultaneous measurements of the same blood using two analyzers from the same brand.

1/2

Want to increase your V̇O₂max?

Switching testing equipment might be the easiest way...

Data from our open access EJAP study, doi.org/10.1007/s004..., with dataset and additional figures on @figshare.bsky.social, doi.org/10.6084/m9.f....

2/2

How accurate and precise are handheld blood lactate analyzers?

Raincloud plots illustrating the relative difference between four commonly used handheld analyzers and the Biosen C-line stationary analyzer.

Pretty (and) informative?

1/2

Agreed! And the integration with ResearchRabbit is awesome.

Conclusion: Be careful with interpreting HRV-based metrics outside of rest.

More on this topic here: www.sciencenorway.no/culture-hear...

5/5

Which is likely due to the watch not being able to measure my HRV (and HR) correctly.

In fact, it thinks my HR is 75 bpm, not 136 bpm as my ECG chest strap is suggesting.

Note that measuring HRV correctly is even more difficult than measuring HR.

4/5

However, the sensor on the watch can only measure HRV with sufficient accuracy when you're at complete rest.

Example: This is me cycling indoors at 190 W and 135 bpm. My watch thinks I'm at a stress level of 28/100. While I'm exercising!

3/5

Among the topics we discussed is the continous measurement of your stress level during the day. According to Garmin, this "measure" is based on your HRV.

2/5

Can wearables really unlock the secrets of your health?

A discussion on heart rate variability (HRV) +++ with @dsquintana.bsky.social, Marco Altini and Henrik B. Jacobsen.

youtu.be/jASGg7PJc2A

🧵1/5