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TSS in Reports

I have searched the forums and see this reported elsewhere, but unfortunately cannot find any sign of a resolution.

Can someone explain why the TSS in Reports never aligns to the TSS recorded in activities? And...does this have an impact on the Training Load reported also (I suspect it does).

Just as a couple of examples;
1) on Sunday I rode for 4 hours and 20 mins. The activity is recorded in Garmin Connect with an IF of 0.741 and a TSS of 238.1
2) On Monday I rode one activity for 7 hours and 13 mins This activity is recorded in Garmin Connect with an IF of 0.693 and a TSS of 346.9

All these values align to what I see in TrainingPeaks also.

But...if I go into Reports and look at those two days I see:
1) Sunday TSS reported as 83
2) Monday TSS reported as 208

I did other (shorter) activities on those days, so the daily TSS should be higher than the values above; and TrainingPeaks reports that correctly. Additionally, the weekly TSS is only 64 for the week that incroporated the Sunday ride which on it's own was 238?!

Is the Reports function of Garmin Connect just broken or is Garmin applying a different logic to TSS than the company that developed it?

Many thanks in advance.
  • I had a similar question. The answer I got from Garmin was "the issue you are referring to is done by design. Garmin Connect will show your highest stress score for the day and will not accumulate any activities to show an overall stress score.".
  • I had a similar question. The answer I got from Garmin was "the issue you are referring to is done by design. Garmin Connect will show your highest stress score for the day and will not accumulate any activities to show an overall stress score.".

    Notwithstanding that that’s not how TrainingPeaks designed TSS to be used, that explanation from them would at least suggest there is a logic ....except for the fact that on neither of the two days does the TSS in reports equal the TSS of the highest stress score of the day.
  • I got a response from my email to Garmin on this...well, sort of. They asked me to proof the issue by providing screenshots, then asked me to reset my password (so they could view the activities, apparently) and then today tell me they’ve passed it onto Product Support. All of which is a surprise given the explanation given to the poster above. Surely if this was intentional then they’d have told me the same thing.

    Honestly, Garmin’s customer service doesn’t give me any confidence. Too many instances of people being give contradictory information, at best, or lied to, at worst. It really does hold me back from buying anything else from them.
  • Finally received a reply from Garmin, after chasing. Said reply was worse than useless.

    Having told them in my original message that the examples I gave were on days with multiple activities and I was questioning why the TSS for a week could be lower than the TSS for a single day of that week, they decided to tell me:

    ”After looking in to this further, we can see that there are multiple activities on the same day. This needs to be taken into consideration. You're looking at the 1 activity, however, the graph represents multiple activities for the one day and is working as intended.

    The other days are matching correctly since they only have one activity. “

    Seriously, what’s the point in that? I wasn’t looking at the 1 activity and I was asking about the period reports. It’s also contradictory to the info given to PubBike, as the report for each of those days doesn’t take the highest score, so god know how it is “intended” to work.

    As per per my previous post, I shouldn’t be surprised at the dreadful customer service. But I am still disappointed. Still, I guess it gives me a further reason to keep £750 in my pocket, rather than buy a Fenix 5+...
  • I've now received a reply from "Bjorn" who doesn't address at all my escalation of the poor customer service but...

    In email one he says "I've looked at those days and you did other activities....I have added this new information to your case". I clearly reply to point out that this isn't new information but was present in my original contact form.

    In email two he tells me (in a roundabout way) that the TSS in the reports is an average, though he doesn't actually say that explicitly.
    "From what I see 346.9 + 68.7 = 415.6 ÷ 2 = 207.8 rounded (208). The average seems to be correct."

    So, we have PubBike being told it's supposed to work as the the highest of the day, me being told it's an average for the day and confusion all round. Especially since the measure is proprietary measure of TrainingPeaks who say that the "cumulative over time" should be used.

    @GarminHealth, or any other official contributors, can Garmin correct the calculation; or at the very least provide consistent feedback to it's customers on how you've decided this should work.