Can someone explain this

How can there be such a difference between power data from strava vs my garmin 520?
Power Meter Stage 6800, zero offset and everything, work fine...

Last race power
Garmin 520 ; average 239w , normalize power 246w
Strava ; average 196w , normalize power 218w

There is a pretty big difference between power data for the same event. Why? what real? wtf?

Thanks

I don't know of any convention that says Strava segments should begin with a dead stop - that's not realistic.

I had to re-define some of my segments because I would show up at the line and wait for my partners, and the Strava would begin my time while I was just waiting around. Makes much more sense to snip a piece off of both ends just in case the GPS is off by a few meters.

Yes . . . indeed, Strava warns you you'll lose this is if choose "refresh activity achievements" (under the wrench) for a ride.

Anyone having a problem uploading Garmin or Wahoo rides to Strava with the newest iPhone app update (v.44, released 5/1)?

Added:

I think I figured out the problem. Strava seems no longer to allow uploads of the same ride from different sources (e.g., recorded in Strava and on a Garmin device). Previously one could upload both (and presumably, like I did, delete one of them).

Once I deleted the Strava ride, which coincidentally had a massive GPS error taking me down some other road and then jumping me across a military installation back to my actual route, I was able to upload the Garmin and Wahoo recordings of the ride (but only one).

Interesting - this still works for me. I use a Garmin & Cyclemeter as a backup. Both get sent to Strava. As of last night (~9PM), it still worked that way (had to delete the Cyclemeter file).

I can't tell you definitely but I can think of three potential differences
1. Different assumption about weight, drag coefficient and rolling resistance
2. Different handling of stopped time (maybe not a factor in a race though)
3. Faster sampling rate with Garmin, which would capture fast surges better than Strava which would have to perform and average

Every ride has an ID Tag. Randomizing this will allow the ride to be uploaded multiple times.

GoToes has some utilities. The Combine FIT, GPX or TCX files app will allow randomization of ID tags. You would only upload one file and there would be nothing to combine but there is a checkbox for ID randomization. The output file can then be uploaded to Strava.


-Tim-

Hmm . . . I don't need to keep duplicates of the rides and wouldn't jump through randomization hoops . . . just want to upload the rides from different sources and then discard the ones I don't need.

Not sure why my experience was different from rl7836

GF & I were thinking that there should be a sex activity for Strava:

track HR, duration, ave. TPM, etc. etc..

Apple Health app has you covered for that.

FitBit's got that:
(posting for a friend)

https://cimg4.ibsrv.net/gimg/bikefor...ddbaf1a48c.jpg

3 min :roflmao2:

Strava Used To ID Cyclist In Bike Path Assault
 

Source.

It would be very interesting to know how they went about this.

they probably checked the "fly bys" of the assaulted cyclists.

Also, GPS polls every second, and is accurate to about 5 meters. You can download pretty much any FIT/TCX/GPX file and go and get the coordinates with time stamps. Probably not a great idea to commit crimes while logging your location every second.

"Charged with malicious wounding."

That's a new one.

Strava: Photo Integration with Instagram to be Removed

But... why? I mean, it's not as if it's difficult to add photos to activities, but what would possibly motivate either company to remove the integration?

The only reason I had Instagram was to post photos to Strava - haven't used Instagram since they allowed direct posting from phone.
More interesting is why there was a 5-year warning... this was announced in 2013 and becomes effective this month.

Looks like two different things - 2013 was syncing of Instagram posts to Strava. 2018 is linking accounts at all. My guess is that the May 2018 change is a result of the EU's GDPR and that syncing would somehow make compliance for one or both companies more difficult.

I have it disabled, never knew what it was. If you disable this setting, what does it mean on a practical level? If you pass someone else, and they have it enabled, can they "see" you, even if it is disabled for you?

I wish Strava would have an option to omit leaderboard results without power data. If I'm planning on riding something, its much easier to find all the riders with power data and have a ballpark of what effort you need to take. Most people I know really don't care about non power efforts, because its not an accurate depiction of what happened.

Unless you mean ebikes, how is a segment time not an accurate depiction of what happened? As for power, won't that vary immensely depending on the rider? A light rider going up a hill needs a lot less power than a heavy person, so I'm not sure what the power figures would tell you absent a filter also for weight.

That said, the filtering options on Strava are pretty poor and more robust filters would be nice to have.

Filter, omit, same thing so long as I have a way just to look at power results only.

Strava wouldn't completely get rid of those results because that's a large part of their user base, and they could care less how someone got a result so long as they are using the product.

There are already filters for weight class.