To wear 3 Polar H10 chest straps simultaneously and additionally use an ECG toolbox to use it as a reference device for heart rate monitor accuracy validation studies?

Rob ter Horst is a post-doctoral scientist at CeMM Research Institute for Molecular Medicine, Vienna, Austria. Rob studied the accuracy of 100 smartwatches and compared those to the accuracy of the Polar H10 chest strap. But the Polar H10 is a single lead or single channel heart rate monitor. Why does a postoctoral researcher working …