Apple Watch Series 5, running Watch OS 9.5.1 stops recording heart rate in swim workout

I've been using my watch to track swimming workouts. Lately, it stops recording in the middle of the workout. Today for example, in a workout of 1 hour, 15 minutes, it only kept track of my heart rate for about 30 minutes. I have it on as tightly as it will go. Picture shows the break in recording.

Any suggestions?

Apple Watch Series 5, watchOS 9

Posted on Jun 12, 2023 8:55 AM

Similar questions

Apple Watch heart rate inaccurate in Apple Fitness + Rowing workouts I have had an ongoing issue with heart rate accuracy when using Apple Watch and Apple Fitness + Rowing workouts. I row while following the Fitness + workouts on Apple TV. This has been an issue for 2+ years, across several different Apple Watch models. My current watch is Ultra 2, but this issue also happened with Series 7. Generally, at the beginning of a Rowing workout, the watch seems to have some difficulty finding a heart rate reading. The display on Apple TV is "grayed out"; then, when a heart rate is detected, it is frequently VERY high. my normal Rowing workout HR is between 90 -110 bpm; frequently the starting heart rate will display between 130 - 180 bpm. I never have that high of a heart rate. Frequently during the early stages of a workout, the HR display will cut out again, then resume (high) and eventually 5-8 minutes into a workout, HR will finally display correctly. The net effect of this is the workout data shows a significantly higher HR than actual. I have had multiple support calls with Apple on this issue; their usual solutions are making sure the watch is on my wrist in the correct spot (it is) and resetting the watch (I have)....but no other suggestions. Also, HR data generally always seems to record correctly with other workouts/activities such as running/walking, etc. Have others experienced this issue? any solutions?
1232 2
Apple Watch Series 9 - Heart Rate Monitoring During Some Workouts I have an Apple Watch Series 9. When I start an exercise like cycling or rowing, I have no issues with tracking my heart rate. If I start an exercise like paddling, outdoor walking, or just Other, my heart rate doesn't continuously track (you can see it trying but not succeeding). Is there a setting that controls this or is this just a bug in the watch?
3732 4
Heart rate is recorded only intermittently during workouts I have heart rate tracking turned on, I have low power during workouts turned off, and my resting heart rate is tracked during the day and while I'm sleeping. I wear the watch tight enough that it is hard to move it around on my wrist. As an example, I went for an 18-minute run yesterday and only the last 3:47 of heart rate was recorded, and even that had a break of about 30 seconds in the middle. Recordings seem to have been taken every 10 seconds for the 3 minutes after I finished. It was about 48 degrees outside so not particularly cold. This watch is marketed as a workout tool so there must be some way to get this to work. What am I missing?
334 1

There are no replies.

This thread has been closed by the system or the community team. You may vote for any posts you find helpful, or search the Community for additional answers.

Apple Watch Series 5, running Watch OS 9.5.1 stops recording heart rate in swim workout

Welcome to Apple Support Community

A forum where Apple customers help each other with their products. Get started with your Apple Account.

Learn more Sign up