I have a few ski activities recorded with power. And the power curve shows correctly in the /activities/:id/power screen.
However, when loading the main /power page, there is a nordic ski tab, but selecting it says “Unsupported sport”.
Supporting it on this main power screen would be great. Even if it doesn’t include the comparison to others graphs.
Is this the power reported by Garmin for XC Skiing?
How well does it track your effort with different speeds, techniques (e.g. skating vs only poles), grades and snow conditions?
Yep, Garmin HRM Pro Plus ski dynamics
I don’t have a ton of data yet. It certainly works with grade well; skating on a flat loop is very consistent, and uphills show the work required and likely the stride change.
Classic may be a bit less consistent. Or the courses I’ve been on haven’t been as consistent. I’m probably less consistent in what technique I use as well.
Having skate and classic split would be nice here as well.
If I could filter by sub-activity type that would be reasonable.
never tried XC Skiing but I remember reading that a garmin update added power for xc skiing based on data from the hrm pro
judging from the concept2 challenges there seems to be a way to measure distance (and potentially power) in some form of clip on for the skis? so for data nerds, that might be more interesting than the garmin gambling 
I have fixed this. It was broken if the sport didn’t have power rankings (not enough people).
Thanks for the information. I do not have a Garmin watch so I cannot test myself. But after it was released I have always wondered how accurate it is and how it can work. When skiing you can have very different snow conditions that will greatly impact how much power you need to put out for a given pace. E.g. newly prepped ski trails vs 10 cm of loose snow. Or hug snow vs loose snow.
I am using Stryd for running power, and one of the “problems” there compared to cycling is that there is no agreed definition of what it is. So Stryd will report maybe 20 % less than Garmin or Apple Watch. For skiing, you have even more degrees of freedom as you are utilizing your arms, upper body as well as legs.
It would be interesting to know if the Garmin reported approximately the same power for two runs on the same segment when the snow conditions were the same (e.g. as two intervals), but doing one with only poles, one with skating without using the poles, and one with skating technique. Or if the power output will be higher for one of them. Or even play with different skating techniques as well.
Also, how well the power is increased when the show conditions change but keeping the segment and pace the same.
sounds like a case study creeping up
I have the watch and the strap, but never tried cross country - not enough snow here anyways