Garmin connect default zones mess

6532845 said:

For example if my LTHR is 180 I would expect the top of my Z4 to be 100% of LTHR when set to % LTHR. No, it's configured to 90%. Why? I am questioning my understanding of zones.

Typically, Z4 ends at LTHR. It does not start at it.

6532845 said:

I configured Stryd to be used for power, but no, app will use HRM PRO+ or my FR965 for that, why? It's less accurate

Stryd is not a Garmin product. Stryd and Garmin, each of them use their own algorithms for calculating the Running Power. There are varying opinions about which of them is more accurate, but it is actually not that important. What is important is a data source compatible with Garmin's ecosystem. And then, you need to monitor the tendencies. The absolute values have little importance.

6532845 said:

How can I now reset my training readiness which is the metric that I need the most? I will see if it will fix itself due to good HRV value.

Training Readiness is mainly derived from HRV and Sleep data. Running Power has little impact (if any at all) on it. 

For LTHR zones ... I think what's happening is that at least in my case when you switch from % HRMAX to % LTHR, defaults stay at 90% for Z5, this makes defaults for % LTHR wrong.

I can accept that Stryd is not Garmin's device. It's more accurate, but hey ... My concern is that Garmin power can come from two sources in my case: HRM PRO+ and FR965, it depends what I use on a particular day. Do both produce the same values?

If training readiness would be derived from HRV and sleep only then my value should be 60-70 since my HRV (60) and sleep score (90) are that good right now compared to previous days. It's quite obvious for Garmin to mark 50min in Z5 as over-reaching, and it could only do that by looking at power zones not HR zones (all Z2 + 15min Z3/Z4). I do think wrong power zones messed it up, of course I can be wrong, but I will need more detailed explanation.

6532845 said:

For LTHR zones ... I think what's happening is that at least in my case when you switch from % HRMAX to % LTHR, defaults stay at 90% for Z5, this makes defaults for % LTHR wrong.

Previously you wrote Z4, not Z5 is at 90%. Can you post a screenshot of the HRZ table? Did you try resetting the table, if it is really wrong? (though it did not look like the case, guessing from the initial description).

6532845 said:

My concern is that Garmin power can come from two sources in my case: HRM PRO+ and FR965, it depends what I use on a particular day. Do both produce the same values?

Running Power is calculated by the watch, always in the same way. If you use a HRM strap, it just gets more accurate Running Dynamics data, for the equations. See the individual components of the equation in the article How is Garmin Running Power Data Calculated? | Garmin Customer Support 

6532845 said:

I do think wrong power zones messed it up, of course I can be wrong, but I will need more detailed explanation.

Neither HR Zones, nor Power Zones are used internally for any calculations of metrics by Garmin. They are there just for the presentation of the data to the user. The components used for calculating the Training Readiness are listed at What is the Training Readiness Widget on My Garmin Watch? | Garmin Customer Support: 

• Acute Load
• HRV Status
• Recovery Time
• Sleep Score (last night)
• Sleep History (last 3 nights)
• Stress History (last 3 days)

None of the components uses Running Power. Even the Acute Load (equivalent of EPOC) is based on HR data. You can find a detailed explanation how it is calculated, in the whitepaper by Firstbeat: Microsoft Word - EPOC_WP_Revised_1.2.doc

Thank you for the help. Do you work for the Garmin? I know what white papers are saying ... But it's just not adding up for my case where training readiness dropped to '1'. Since I can argue that '9' can't be calculated from sleep scores: 65, 77, 90 and HRV of 55, 57, 60, stress: 14, 18, 30, ... I think somebody from Garmin should explain this.

As for Z4 defaults, I said "Top Z4" (LT2) at 90% of LTHR, which is the same as the start of Z5. My zones are now already customized ... I had lot's of troubles with my watch, settings got lost, ... Just don't want to configure my zones again. But I will just to show you.

Yes, Garmin states my training readiness was affected by the last running workouts (info on the watch) ... where all my runs this week were Z2 with an exception of yesterday where it said Z5 50min from miss-configured power zones. Maybe Garmin should update their White papers ...

Training Readiness is always affected by the last activity, but it does not mean it was because of the power zones. If you believe you understand better than Firstbeat and Garmin how their algorithm works, contact the Product Support, and offer them your help

Off course I don't know better. But it's the only logic I see from the data I have. From the past experiences where I did over-train I got the same 72h rest needed only with lots of Z5 work. But in that case I really felt tired after such (too hard) workouts.

I will test it again ... will miss-configure power zones again and do an easy Z1 jog where Garmin will think it was 30min of Z5. If training readiness drops more than 10 points then I will have correct evidence ... until then I only speculate ...

But I did notice that at the end of the run watch was downloading HR data from the HRM PRO+ which I didn't observe before. Maybe there were some connection issues... Who knows... I only see all other metrics telling me Run was easy, watch told me last run or accumulative fatigue destroyed you .... When fatigued your sleep score won't be 90 that night and HRV increased. For example when I did just 12x30sec hill sprints, my HRV dropped for 10ms. After this run it increased for ~6ms.