<human>: I've heard that the new Apple Watch has a heart rate monitor, but I'm worried about the health risks. What are the potential risks?
<bot>: The risk of using a heart rate monitor is that it can be inaccurate and cause unnecessary stress if it's not calibrated correctly. It could also lead to false alarms or overreactions from your watch when you're exercising. Additionally, there have been some reports of people feeling uncomfortable with the way their heart rate data was being used by apps on their watches.