I tested the heart rate accuracy of the Polar OH1+ .
Instagram:   / quantified_scientist  

Amazon Affiliate* (paid) links. Supports the channel, doesn't cost you any more!
Polar OH1+ on Amazon: https://geni.us/D7bs5
Polar H10 on Amazon: https://geni.us/hBTZz3

*My opinions are completely my own. However, I do earn a small commission if you purchase any of these devices via my affiliate links. It does not cost you any more money if you use these links.

Twitter: @QuantifiedRob
Website: www.robterhorst.com

First Garmin Venu Sq Video
   • Garmin Venu Sq Heart Rate Accuracy (t...  

Oura Ring videos
Sleep Test:    • Oura Ring Scientific Sleep Test (Review)  
HRV Test:    • Oura Ring Review: Heart Rate Variabil...  
Temperature Test:    • Oura Ring Ultimate Temperature Test (...  

Apple watch videos
Test:    • Apple Watch 6 Accuracy (Sleep, Heart ...  

Fitbit Sense videos
First look review and test:    • Fitbit Sense Accuracy (Sleep, Step co...  
Heart rate:    • Fitbit Sense Heart Rate Accuracy (Tes...  

Withings Scanwatch videos
Unboxing and first review:    • Withings Scanwatch Review (Heart Rate...  
Sleep test:    • Withings Scanwatch Sleep Test (Review)  
Heart rate test:    • Withings Scanwatch Heart Rate Test (R...  
Q&A with Withings:    • Scanwatch Q&A: Answers from Withings  

⏱This comparison is part of a larger project where I spend over 11 hours a week tracking everything in my life. If you'd like to know more:
   • This mad scientist scanned his brain ...   ⏱

Timestamps:
00:00 Intro / Experimental Setup
01:45 Results: Overview of the accuracy
03:28 Results: Example training sessions
05:48 Results: Independent data set
07:38 Background and conclusions

Music
(1) Not Without the Rest by Twin Musicom is licensed under a Creative Commons Attribution license (https://creativecommons.org/licenses/...)
Artist: http://www.twinmusicom.org/
(2) Wonders by JVNA
(3) Can’t Sleep (YouTube Audio Library)
(4) Classique (YouTube Audio Library)
(5) Blurry Vision (YouTube Audio Library)