Aerobic/anaerobic data with HRM-TRI

Hello,
yesterday, I performed my first run with the HRM-Tri heart rate monitor. After stopping the activity, the watch showed (among others) my anaerobic and areobic training data, which were:

aerobic: 3,2
anaerobic: 0,0

The data were uploaded into Garmin Connect automatically.

After that, when I checked all data from that run, I found the option "download heart rate data" (or similar; german version!), which I activated. After downloading the data, I got the following training data for the same run:

areobic: 3,2
anaerobic: 1,3

Obviously, also these updated data were uploaded into Garmin Connect, I now have two entries for one run. They are absolutley the same except the anaerobic/aerobic data. Any explanation for that would be very welcome.

Jens

0 JSRUNNER_ over 7 years ago

Tschens This seems to be a bug - there has been another recent thread on here. The HR data should download automatically (and obviously has from your description) but downloading again causes incorrect data. I am not now seeing this option (V8.00 on Garmin 935) are you on latest firmware?

0 Tschens over 7 years ago

Thanks for your reply. Yes, I am on the latest firmware with my Fenix 5 Saphire (8.00.). Good to know that the second download gives wrong data since these data do not fit to my previous ones at similar heart rate with my good old standard heart rate monitor. Unfortunately, I erased one of the entries in Garmin Connect, and (murphys law) I erased the wrong one :-).

0 Tschens over 7 years ago

Meanwhile, I found the following thread. It seems that if you download heart rate data after a run, you get wrong aerobic/anerobic and calories data. The problem is known since months and is not worked on by Garmin. I wonder if the data are correct after a swimming session - this renders the HRM-Tri unreliable and useless compared to a normal cheapo one.

Yesterday I was confronted with the "static electricity" problem causing completly wrong temperature and altitude/barometer readings of my Fenix 5 the whole day - a problem discussed elsewhere here in the forum. I deeply regret I bought this piece of s..t.

https://forums.garmin.com/forum/into-sports/running/forerunner-935-aa/1279219-hrm-tri-download-heart-rate-why-does-it-change-te-etc

0 mcalista over 7 years ago

Jens,

You should only need to download HR data if you don't have live HR data -eg. swimming (no transmission through water) or contact sports (where the belt and watch are too far apart to transmit). If it is just a run, you shouldn't need to duplicate the data by downloading. (But I totally understand why you would want to experiment on your first run with the HRM-TRI).

As to the different TE, do you have sport-specific HR zones set up? Different zones will give different TEs from the same HR data. The HRM-TRI doesn't know what activity you are doing, but the watch does.

0 Tschens over 7 years ago

No special zones defined, I let the watch do the work. I would not rely on the calories, aerobic and anaerobic data after swimming. Why should they be correct when they are proven to be wrong and pure fantasy data after a running session?

0 mcalista over 7 years ago

Oh well. There goes that theory.

0 HeliosJim over 7 years ago

Does this issue affect only the HRM-TRI, as opposed to say the HRM-RUN?

0 LadoK over 7 years ago

Does this issue affect only the HRM-TRI, as opposed to say the HRM-RUN?

Yes, because hrm-run has no storage and you can not download anything.

Lado

0 meste7 over 7 years ago

I have experience the same issue but as a bonus I also got another strange behaviour which Garmin is aware (I told them) but still no solution (this issue was since FW 7.00 or so as I remember, so quite old). So, after I download HR after any activity (run, bike, no swim though) with my HRM-Tri, the watch, most of the time ignores the workout when syncing with my iPhone or Wifi - the only way to get it to Garmin Connect is through cable. In other cases I ended with double workouts.