So I’ve been knocking out redundant miles on the track lately to keep my mileage in check for the fall marathon season and I noticed that when I download my run data on my comp the elevation says +273 and -279. Being that I am running on a flat track am I to assume the elevation is based on the little up and down movement from my armswing while running or is this thing taking on a mind of it’s own?
FR 305 is not an accurate elevation device. Have to use something like the Edge 305 that uses a barometer. Used to get flat rides with 5K feet of elevation 
my 305 always seems of for elevation on the high side on the bike as well, fairly consistent but consistently high…
Do you use sporttracks? If so there is a plug-in to correct the elevation
http://www.zonefivesoftware.com/SportTracks/Forums/viewtopic.php?t=2269
I haven’t used it but a friend tells me it corrects these little issues as well as the exaggeration factor that seems to happen.
Do you use sporttracks?
x2 for SportTracks. I don’t use the elevation plug-in, but I think the overall elevation is decent on the 305.
For a hill route that I run frequently, it’s measured peak elevations of 570, 574, 595, 578, and 582. I’m not sure what the exact elevation is (probably somewhere in the middle), but that’s good enough for me.
But yeah, I ignore the overall Climb +/-. For two recent swims, it came up with +272/-310 and +746/-744. 
So I’ve been knocking out redundant miles on the track lately to keep my mileage in check for the fall marathon season and I noticed that when I download my run data on my comp the elevation says +273 and -279. Being that I am running on a flat track am I to assume the elevation is based on the little up and down movement from my armswing while running or is this thing taking on a mind of it’s own?
Check out the accuracy that the GPS device displays at any given point in time. With a good signal, ±12 feet or so would be good. The vertical (elevation) accuracy would probably be at least 3 times worse than that. You arm bouncing up and down is irrelevant.
Rik
Not always the most accurate on an absolute level but I don’t think it’s too bad. This is an official elevation map from a 70.3 and then mine from sporttracks (NOT using the plugin that corrects for altitude, this is raw data).
Not always the most accurate on an absolute level but I don’t think it’s too bad. This is an official elevation map from a 70.3 and then mine from sporttracks (NOT using the plugin that corrects for altitude, this is raw data).
Yes, it does give you a good idea of the course profile. On the other hand, because of the variability of the individual readings, you get wildly exaggerated elevation gain/loss stats.
Rik