The very latest Bangle.js firmwares do have much improved heart rate monitoring now, but I think while running there will still be issues until someone can come up with an HRM algorithm which uses accelerometer data to discount false readings
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
The very latest Bangle.js firmwares do have much improved heart rate monitoring now, but I think while running there will still be issues until someone can come up with an HRM algorithm which uses accelerometer data to discount false readings