Where to get a COMPLETE list of FIT profile and message definitions?

oh that is very interesting and was not aware

apparently Stryd is also not aware because they do not add their metrics to the lap and session messages in their datafield

but what I really meant is also appending into to the activity summary "all details" on the watch itself, you'd think Garmin would wake up to the idea of allowing developers to inject additional summary info there

BTW as you might be one of the most feature aware developers around, can you think of ANY way to get vo2max with decimal anywhere on the watch

I can do it in post-analysis of the FIT file in windows via my own code using the full metmax field calculation but other than looking at the race-predictor moving by a few seconds, there is no way to see if vo2max is ie. 55.1 55.2 55.25 or whatever on the watch itself

Remember when Strava finally added decimals across their entire system years ago and made it so much more useful?

Garmin still hasn't caught onto that concept.

28 hours of recovery time could be 28.0 hours or 28.9 hours, there's no way to tell on the watch itself, only post-analysis

Heck Gamin doesn't even round seconds consistently across their summary displays, it's like a dozen different coders wrote all the different parts and no-one bothered to consolidate any of the rounding methods after a decade

Hard to believe that Stryd is not aware, it is well published on the same page as the record FIT data. Probably a matter of prioritizing their own app.

I'm not sure whether it is really that useful to allow developers to add additional summary data on the watch itself. It doubles the effort, and I don't know how many people really look into their activity stats on the watch, myself I mainly do that in the app or on the Connect website. And Garmin could use their software developers potential more wisely by fixing bugs that cause people to lose their activity data.

On the watch, you can view vo2max for running and cycling, as it is in the UserProfile, but indeed, only as a number without decimals. The alternative would be to develop a web service and get the info via an Internet call.

I find the GPS signal info interesting but useless

What I look for to indicate GPS errors is two things

1. any record without lat/lon = GPS loss

2. impossible speeds in meters per second for running (4 minute miles) or cycling >35mph

which indicate the GPS speed calculation is playing "catch up"

did you know GPS speed is done using doppler-effect like a siren going by, where the hardware listens to the shift in pitch and does not need a sat lock, I found that fascinating

But what's really weird to be is days like today where there are no apparently GPS errors and yet the distance for my 6.5 mile run comes up to 7 miles which is quite the stretch

I think what is happening is my HRM-PRO and my Stryd fight it out for distance source and while the Stryd usually wins sometimes the HRM-PRO feeds the watch the wrong distance data and it's not as accurate (DC Rainmaker proved it)

But I cannot tell in the FIT file what source was used for distance, GPS vs Stryd vs HRM-PRO, there's no clear indicator to me unless I am missing something

It's also impossible to see the calibration factor on the HRM-PRO when it acts like a footpod, unlike the Stryd which exposes the calibration number and allows manual change

You'd think Garmin would improve this by now after a decade, HRM-TRI, HRM-PRO, HRM-PRO-PLUS and now HRM-600 all still broken with no manual adjustments and no "events" in the FIT file showing when calibration happens and to what number

So Is it impossible to know if a Stryd Pod is accurately calibrated, given that in the FIT file the source for 'Distance' changes between GPS, Stryd, and HRM-PRO, as the source messages seem to indicate? Does this switch occur even when the sensor settings for speed and distance are set to 'Always'? Thank you  for your insightful posts about CF.