Strava vs. RunningAhead elevation

[Jeff Walker]

Chuck and others: my watches do not have barometric altimeter. Both Strava and RunningAhead use lookup tables to compute elevation during an activity, yet give very different elevation gains. Obviously their smoothing algorithm differs.

Yesterday's ski at Pineland (2x River + Valley farm loop):

RunningAhead: 12.76 miles, 1568.8 elevation (I love the sig digs here!)

Strava: 12.9 miles, 839 ft elevation

Which do I have more confidence in?

Jeff

sapere aude

--------------------

Jeff Walker

Dept. of Biology

University of Southern Maine

96 Falmouth St.

Portland ME 04103

phone: 207-228-8166

fax: 207-228-8116

http://usm.maine.edu/bio/jeffrey-walker

Google Map: http://tinyurl.com/usmsci

[Ryan Triffitt]

The one in the middle. 

Sent from my iPhone

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[Chuck Hazzard]

Hello Jeff,

I have been using an older Moto X phone to track my runs. I also wear a barometer on my waist. I ran a six mile loop behind my house yesterday, the barometer netted 495 feet, while Strava showed 358 feet.

I have not used Running Ahead in years, but would just take the elevation gain for what it is. 

Enjoy!

--

Chuck Hazzard hazzard.org

[Jamie Anderson]

Will take advantage of this opportunity to be self-serving and gloat about my Zen-like approach to not running with a GPS watch for several months, hinting that I am superior and way more hipster than everyone while simultaneously and unabashedly drawing attention to myself. 

I'm also slower than I have been in the past three seasons!

Being more serious, I've used both RA and Strava last summer and found Strava's lack of proper (if any) elevation profile correction to be disappointing. RA was clearly superior in that aspect. The competition for fastest segments is what stood Strava apart from the rest but not much else, IMO... unless something was improved upon during my hiatus.

-Squatch

P.S. I typed this email on a vintage 1800s typewriter at an outdoor cafe located next to a busy sidewalk. 

[Chuck Hazzard]

Ah yes, I recall seeing an article about you Jamie and your carefree running around Florida. 

http://www.sptimes.com/2007/10/04/Life/Catching_up_with_the_.shtml

[gIANt]

I've noticed that it also depends on what device you use. I did a run at Hardy Rd in Falmouth with Chris. I got 5.0 miles and 519' with my Garmin 310XT and Chris got 5.0 miles and 682' with his Suunto Ambit.

I think Jamie may be on to something, although we'll see in VT...

gIANt

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[John Rodrigue]

Lol....I still go old school....timex watch with chrono....no altitude or distance....my legs, lungs and heart are the only Guage to altitude and distance.....but it sure is fun to see all your posts from your GPS devices...I've even stolen some for my facebook photos.... :-)
All this stuff is just too technical and time consuming....hahahaha....but amazing to see

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[Jeff Walker]

The Suunto has the altimeter so Strava defaults to that. Chris' data should be better. If no altimeter data are available it uses one of the public elevation databases. I don't think its the database that Strava uses, I think its their smoothing algorithm. I think they are bikers primarily (or road runners) and roads just don't have the kinds of short steep hills that trails (including ski trails) have, so they use an algorithm that insures that oversmooths to remove these "artifacts".

sapere aude

--------------------

Jeff Walker

Dept. of Biology

University of Southern Maine

96 Falmouth St.

Portland ME 04103

phone: 207-228-8166

fax: 207-228-8116

http://usm.maine.edu/bio/jeffrey-walker

Google Map: http://tinyurl.com/usmsci

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[Chandra Leister]

Curious about the Moto X app you're using, Chuck, as I have an old Moto X (which was recently tested successfully under a snow pile for 27 hours), and would love to play around with it.

I'm currently comparing the VivoSmart step/mileage data to the Garmin Forerunner 10- Forerunner is more accurate, but Vivosmart vibrates when i reach a milestone, and that's nice.

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[Ryan Triffitt]

Jeff: The altimeter "should" be better, but only if it's calibrated properly. (I think...)

--

Ryan Triffitt
207.837.5045
ryantr...@gmail.com

[Chuck Hazzard]

Hello Chandra,

I am using Wahoo Fitness, which I then export to Strava, MapMyFitness and Magellan.  I am testing software for the Magellan Echo Fit. 

I alternate between a 2013 Moto X and 2013 Moto G.

Enjoy!

On Wed, Feb 18, 2015 at 9:21 AM, Chandra Leister <chand...@gmail.com> wrote:

Curious about the Moto X app you're using, Chuck, as I have an old Moto X (which was recently tested successfully under a snow pile for 27 hours), and would love to play around with it.

I'm currently comparing the VivoSmart step/mileage data to the Garmin Forerunner 10- Forerunner is more accurate, but Vivosmart vibrates when i reach a milestone, and that's nice.

[Chuck Hazzard]

Most barometers allow you to set your device to a reference altitude (My Suunto Core, Suunto Altitude and Kestrel 4000 work this way).

You really only need to set to a reference altitude if you need to know your current altitude at any given moment. Otherwise just leave it be and your elevation gain will still be correct. 

On Wed, Feb 18, 2015 at 9:27 AM, Ryan Triffitt <ryantr...@gmail.com> wrote:

Jeff: The altimeter "should" be better, but only if it's calibrated properly. (I think...)