Back in February 2021 I got my first heart rate monitor that was compatible with Zwift. I had previously been using my dads Garmin heart rate monitor but it wasn’t compatible with Zwift. I had to use our concept 2 rower as an Ant+ bridge. I used an app called RowedBiker to connect the rower, then that app connected to Zwift. It was a pain and I was starting to get more into Zwift racing. With the Zwift Racing League series heart rate monitors were required to use.
After doing some research I found that the Polar H9 could go down pretty small which is what I needed. The Garmin ones always slipped down and I had to tie parts together to get it to fit properly. I got the size XXS which another kid that I knew had and he said it fit pretty well. I think that heart rate monitors are a very good training tool to have and they can be very useful, especially if you are someone who enjoys racing on Zwift, many races often require heart rate data as a way to verify that you are not cheating.
The accuracy on this heart rate monitor is far more accurate than my Fitbit Charge 2 that had a built in optical sensor. The data wasn’t consistent and it didn’t pair to Zwift. Overall the Polar H9 is an amazing heart rate monitor. So far I have not had any issues with accuracy or pairing. It will pair to my garmin almost instantly along with Zwift. The Polar H9 can pair to one bluetooth device at a time but it can do unlimited connections through Ant+ which is what most bike computers connect to. I mainly use this for indoor rides but I will occasionally use it on an outdoor ride. Here is a data sample from one of my races recently.