We suggest Rob ter Horst, Post-Doctoral Researcher at CeMM Research Institute for Molecular Medicine, Vienna, Austria to use the following device for runs up to 15 km/h on a threadmill as a reference device instead of a Polar H10 chest strap

Last Updated on January 19, 2023 by pg@petergamma.org

The devices is not cheap, as for a quote:

but we think Rob er Horst should choose a reference device that is at the level of his professional research instead of a Polar h10 chest strap. Unfortunately, it is not a Swiss quality device, the contact office is Baghdad, but it is one of the best devices which we know which we can suggest to Rob. It can be used for running on the treadmill up to 15 km/ and indoor cycling, treadmill and exercise bike included, and has a high quality clinical accuracy, 3 lead ECG and more which is gold standard for HR measurements for these activities.