Indicates whether the model employs a chest strap mounted sensor that transmitts to a watch, a chest strap mounted sensor that transmits to an iPhone app, a watch that requires the user to touch ...

My experience wearing the Whoop 4.0 alongside Apple, Garmin and Polar watches, plus dozens of heart rate monitors ...

or bike ride. This simple type of training can help you take your fitness to the next level. The Polar H10 is a traditional ...