North Pole Engineering has launched heartbeatz, a new device that acts as a bridge between an Apple Watch and any exercise bike or treadmill with ANT+. This enables the machine in question to display heart rate information directly from the wearable while in use. No more checking your wrist during a workout!
https://www.notebookcheck.net/A-new-gadget-can-transfer-Apple-Watch-heart-rate-tracking-to-workout-machines.444789.0.html