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Miscalculated training effect and calorie expenditure on single run

Hello all,

I've been using Garmin Forerunner 235 with Garmin Premium Heart Rate Strap for some months now. During that time I've recorded 75 workouts without any problems. During today workout I've noticed that TE value is not increasing. After I've completed my training, TE stayed at 1.0, although it is usually at 3.5+ for similar trainings, and calorie expenditure was like 4-5x less than usual.

I am running latest Forerunner 235 firmware, and only change between this and previous workouts is that I've installed some apps from Garmin App Store. Any ideas on what went wrong? Is it possible to to recalculate TE/Calories?

Best regards, Marinko

0 Former Member over 9 years ago

I've had the exact same problem, but I was able to isolate it to a specific app I downloaded. I've contacted the app developer and he is checking into it. I'm not going to mention the app and risk its demise while it's being worked on. I'll send you a private message to see if this app may be causing your problem too.

0 MiToZ_ZG over 9 years ago

Thanks for replying. I've replied to your private message, but unfortunately we didn't install same app :\ I hope Garmin can tell us something more.

Best regards

0 MiToZ_ZG over 9 years ago

Although I uninstalled all previously installed Connect IQ apps, it happened again (TE 1.0 and calories burned way too low) :(

0 timgrose over 9 years ago

Would help if you posted the relevant GC links here please so we can try and work out what may have gone wrong.

0 MiToZ_ZG over 9 years ago

Would help if you posted the relevant GC links here please so we can try and work out what may have gone wrong.

Are you referring to link to some of those TE 1.0 trainings? If so, here is one: https://connect.garmin.com/modern/activity/1122101334 ... it doesn't look much different from others.

Best regards.

0 timgrose over 9 years ago

Well there is quite a lot of things to observe there.
It is an indoor bike ride but no distance - presume you are not connected to a distance/speed sensor?
Then there are huge dropouts in cadence. Was this actually recorded in bike mode or run mode? Are you actually connected to a bike cadence sensor or is that just vibrations from the watch being picked up in run mode?

I feel the TE is basically not being computed here as the data there is so flaky.

Have you had a similar indoor ride when you did get good data?

Is it OK for outdoors runs/rides?

0 MiToZ_ZG over 9 years ago

Well there is quite a lot of things to observe there.
It is an indoor bike ride but no distance - presume you are not connected to a distance/speed sensor?
Then there are huge dropouts in cadence. Was this actually recorded in bike mode or run mode? Are you actually connected to a bike cadence sensor or is that just vibrations from the watch being picked up in run mode?

I feel the TE is basically not being computed here as the data there is so flaky.

Have you had a similar indoor ride when you did get good data?

Is it OK for outdoors runs/rides?

Hello TIMGROSE,

First of all thanks for replying. It is an indoor bike (spinning) training with no distance/speed sensor on bike, but Wahoo RPM cadence sensor on my shoe. I do have problem with Wahoo RPM when cadence is low/erratic (e.g. when standing on legs with heavy resistance on bike). At those moments, Garmin stops receiving cadence info. All trainings are recorded in Indoor Bike mode.

I don't have access to TE computation algorithm, but I would be surprised if cadence data could influence it so much. As I've stated in my first message, I did something like 70 trainings in a row in which TE was calculated correctly. It way only recently that I've go miscalculated TE in 2 out of 5 trainings.

Here are some similar trainings where I had no problem:
https://connect.garmin.com/modern/activity/1080926930
https://connect.garmin.com/modern/activity/1108575571

Best regards, MiToZ_ZG