Chest heart rate monitor & Lactate threshold. I'm looking to do a lactate threshold test via my Garmin fenix 6 Pro. At the moment it seems that the heart rate zones are not correctly configured so I'm under the impression that by doing a lactate threshold test the heart rate zones will be more accurate. After doing a bit of research it appears The heart rate monitor (paired to my Garmin bike computer) rose to around 150 bpm as expected. To stress… this IS NOT an issue with the Epix’s heart rate monitor hardware, because if I start an activity on the watch the heart rate tracks the chest strap heart rate pretty accurately. The following image shows the difference. Heart rate (from It seems like the watch calibrates the wrist HR sensor in the beginning, and having a calm, stable heart rate for a few minutes makes the calibration better. I usually do this for maybe five minutes before a run, or while walking down to the gym. It doesn't make the wrist HR perfect, but it makes it a heck of a lot better. On my hikes in Malawi in 30-35°C my heart rate was shown correctly without a hitch. If I warm up before going out on a hike during winter at home I usually have no problems. However, if it's chilly and I don't warm up, my heart rate will be reported suspiciously close to my cadence the first 15-30 minutes (and sometimes through the entire walk). I noticed this several times with Fenix 6X and now it happened again with 7X - if I'm not using actively the Fenix during an workout (bike indoor), the measurement of the heart rate is way lower than reality - it looks like Fenix is just providing some random lower numbers, not paying attention to the real hear rate. So, I used my Tacx trainer Maybe its losing connection during the exercise, so it's just showing you the less accurate watch HR data, and grabs the chest strap data at the end of the exercise to link together when you view the workout in the app. It says the chest strap is connected. During exercise it just shows some random low heart rate. pZWmTs. The Garmin Fenix 6’s Smart Trainer mode only has one annoying issue. Heart rate readings from the optical sensor on the back of the watch are disabled when connected. Maybe its losing connection during the exercise, so it's just showing you the less accurate watch HR data, and grabs the chest strap data at the end of the exercise to link together when you view the workout in the app. It says the chest strap is connected. During exercise it just shows some random low heart rate. Yes, was frustrated with false advertising by manufacturers ans sales ("accurate to 2 heart beats" - in reality it is accurate to 30-40 beats which makes it useless). I did more manual HR testing during low activity times when I expected my HR to be around 60 and Garmin would occasionally show 80 or even 90, and every time actual rate was You can broadcast your heart rate data from your watch and view it on paired devices. Broadcasting heart rate data decreases battery life. TIP: You can customize the activity settings to broadcast your heart rate data automatically when you begin an activity ( Activities and App Settings ) . Watch is on my left arm, but I have a two handed backhand. I have moved it up an inch. Problem is I never had this issue on the Fenix. And even on the Epix it’s erratic. Eg last week I did a tennis session with an average of 135, and then a few days ago the average was 95, even though I was working just as hard.

garmin fenix heart rate not working