Indoor profile - speed and distance calculation when on a turbo trainer

You can write anytime a CIQ app for virtual speed. The Garmin wont do it because nobody cares about indoor speed and distance, what matters is the duration and the power , nothing more...

Thanks Luko although not actually helpful so not sure why you bothered.

Having the correct speed and distance might not be that important to you, and I agree in terms of pure training metrics it’s not very useful, but I’d personally like my weekly distance stats in training peaks which mix indoor and outdoor rides to be accurate and I’d guess others might too. 

Your suggestion I could just write an IQ app any time I wanted assumes I can, which I can’t , and a quick search on IQ suggests no one else has either unless you know better? Or maybe you could just write one for me?

if anyone else has a more constructive reply I’d be most grateful. 

https://forums.zwift.com/t/zwift-hub-shows-incorrect-speed-on-garmin-edge/613961/

yeah that is also me :-)

I'm slightly surprised I'm the only one in the world who wants to dual record a structured workout using ERG mode on a trainer using a Garmin and who also wants the distance to be roughly right..... although I must admit I never really cared that much before (and as Luko79 says it's not actually valuable as a pure training metric) but now I've noticed it (my weekly states all being 'wrong' in training peaks and Garmin Connect) it's increasingly, irrationally, irritating :-) 

I might end up going back to a convoluted set up where the Trainer Day app (which gets it correct) feeds TP and the Garmin (which is wrong) provides the various health metrics to Garmin Connect alongside my Forerunner and I ignore the inaccuracies there.

Whilst my Edge 840 (which is now my 4th Edge over all these years) is truly overloaded with features proving Garmin has some super smart people working for them (although does anybody really do anything with that Platform Centre Offset data you get with dual sided pedals??!) and so I'm hopeful there is a solution in there somewhere to the basic use case of speed not being a function of 'wheel' revolutions on on trainer when using ERG mode.

Although having said that their software (all these years later) is still full of minor bugs, sloppy programming, poor UI design. Like lots of companies they seem to focus more on shiny new features their marketing guys can push rater than a forensic approach to getting the basics bullet proof so maybe they just don't care about my use case.

Love to be proved wrong on this last point so if anyone know the magic combination of settings I'd be most grateful  

the MyWhoosh is (still) free and that can give You "real" distance and speed indoor. If You wanna use the TrainerDay and the MyWhoosh in paralel then You need 2 mobile devices (or if it is a PC than 1 PC is enough) and You need to pair the HUB only as Power source to the MyWhoosh (and not as a controllable, that is "reserved" for the TrainerDay app) . This method works in Zwift also (just i think You bought your HUB last winter and the free 1year Zwift  is gone and You dont want to pay for apps and wanna use everything freely... ), and your avatar is riding in MyWhoosh/Zwift by watt in the background on any selected route and when You finished your workout in TD, save the another workout in MW/Zwift and upload that file into TP . But i think easier to forget this "my indoor distance stats" thing and just ride indoor (by WO or by feel) and be healthy. 

"does anybody really do anything with that Platform Centre Offset data you get with dual sided pedals??!"   Yes, if You are a bike-fitter (or has bikefitting ability), it can help to tweak the cleat position to the ideal place. And the balance values and the starting/ending pedaling phases values also can help if you know what do you need to change on the bike to achieve the best/ideal numbers. (ofc, it needs some knowledge and experience, and there is no written to-do list by Garmin... ) i had dual Vectors 10years ago, trained with them for many years then i sold it and bough much more accurate and reliable powermeters (Power2Max NGs latest) for my bikes, the accurate, consistent and reliable datas are much more helpful than the extra gimmicks (from a level, ofc)

Anything other than zero speed and zero distance on a trainer is wrong.  Any speed or distance imaginary, or to put it more kindly, is virtual.  This imaginary speed depends entirely on whatever input and formula is used to calculate it and is of no practical value in gauging training or performance. Even outdoor workouts are based on effort levels and duration, not speed or distance.

Thanks Luko79

I'm not sure you're understanding my issue mind you - I have the excellent (and paid for just like TP and various previous training apps) TrainerDay app which already correctly calculates the accurate speed and distance so I don't need MyWhoosh or any other app. This is not my issue.

Whilst you are not interested in Garmin displaying the correct data i am hence me asking the community here if there is a way to make it work.

I'm thinking that there probably isn't as maybe Garmin would rather invest in theoretically helpful but practically in the real world quite obscure features rather than this or simply fixing some of the things that have been hanging around for generations. 

Yeah i get that Looigi but it's not what i'm asking is it.

I don't use this figure for building or analysing indoor training or my outdoor training and I'm not sure why you are assuming i do

My question is quite simple - When using ERG mode training apps calculate/estimate speed correctly and Garmin does not, the figure they show is wrong, so i'm asking the Garmin forum if anyone knows of a way to set up the Garmin so that it shows the correct figure - that's all. 

Perhaps i shouldn't have bothered as the only replies i've had are to tell me my question simply isn't valid