Two components needed to calculate power - force and velocity (P=Fv). Any differences in the methods used to calculate force or velocity will naturally lead to differences in the result.
I'm spending way too much time thinking about this
Could be, but it's a good distraction.
Not sure that GPS is inferior to data from a footpad. Once uses satellite triangulation, one uses accelerometers. Which is best? I'm not convinced that a footpad can detect changes in pace so easily. Pace is the product of stride length and stride frequency. The faster you go, the bigger the stride generally. Not convinced accelerometers can deal with that too well.
Actually the only way to get any meaningful pace data is thanks to accelerometer in the watch. The accelerometer in Stryd is much more accurate than wrist dead reckoning used by the watch however and can be even used for total distance calculation, not just real time pace filtering, like on the Garmin watch.
I tested Garmin Running Power a while back and noticed vertical movement, like jumping around could give quite notable power readings. However, while moving it seems still mostly to use speed / hill grade as the main component, and similar to other models around, just that the numbers are proportionally bigger.
As long as you redo your FTP test I'd say there isn't a big difference in every day training using either of them. You could use the same zones, especially if you train by Intensity Factor, which is power / FTP.
Stryd is just much more refined, doesn't underestimate downhill power as much and reacts faster to hills. Actually I think hill gradient calculation is still the main achilles heel of running power, Stryd have managed to make it more "instant" than others, but we're still far from cycling power meters.
And while we're at it, not sure if we should even call it running power. As the current solutions rely so much on hill gradient, it's actually just glorified grade adjusted pace. I could train just as well using NGP from training peaks (if there was a datafield available) as the results are remarkably close if I adjust the pace zones according to my power zones...
I installed the combo field again after a few months running without power. On all my three runs now wind feature is disabled. No idea why. It worked in the past. Any ideas?
Wind feature disabled on all my runs. Nobody any idea how to solve this?
Weather is working fine on my 935 and as stated above: it did work before.
Is this setting enabled in your GCM? Select your FR935 and drill down to data fields, select "Combo Running Power" and then click on "Settings". Make sure "Account for wind power in power calculation?" is enabled there and sync afterwards.
Just a thought, if this is already selected I'm not sure what's wrong.
