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[icon] Corollary to yesterday's entry - Patti
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Subject:Corollary to yesterday's entry
Time:01:27 am
Running on level ground is easier.

My GPS is confused, though. When I was running in Redondo Beach, I had maybe 40-50 feet of elevation change between the highest and lowest point, with lots of rolling hills. The GPS claims that my total ascent was 602 feet, and my total descent was 621 feet. That seems high but not unreasonable given the amount of up-and-down I was doing.

When I run at home, I have approximately ten feet of elevation change between the highest point and the lowest point on my route. The GPS claims I did 1098 feet of ascent and 1059 feet of descent tonight. That seems silly. In one "lap" of .21 miles it claims I did 250 feet of ascent and descent. Silly electronics.
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timprov
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Time:2012-10-16 08:31 am (UTC)
I expect it's the leaping in the air like a gazelle that's causing it.
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whipartist
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Time:2012-10-16 08:41 am (UTC)
Oh right! Here's a picture of me from my run tonight: http://static.tumblr.com/0ieeifo/XZTlvruye/ballet-leap-by-donna-welch-photography-qpps_450679999500834.lg.jpg
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fich
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Time:2012-10-16 05:03 pm (UTC)
If you start and stop at the same place, shouldn't the numbers be equal?
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whipartist
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Time:2012-10-16 06:26 pm (UTC)
Yes, yes it should... at least within some reasonable margin of error.
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byronium
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Time:2012-10-17 04:46 pm (UTC)
What sort of altimiter does your device have? Barometric ones are easily confused, especially with rapid changes in pressure (hello, Bay Area microclimates!).

There are services (I believe that Garmin Connect and Strava both do) that will calculate your elevation gain/loss from your track based on geologic surveys, rather than pressure change. If you have WAAS, enabling that can help as well.
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whipartist
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Time:2012-10-17 06:07 pm (UTC)
The ForeRunner 305 has GPS-based altitude. Apparently it's generally considered to be crap.

http://www.amazon.com/Altimeter-elevation/forum/Fx2AZWLMJ201H0U/Tx2MDGP4GUZ5OTO/1?_encoding=UTF8&asin=B000CSWCQA

I don't really care that much right now. I was mostly amused/puzzled.
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rnrdaddy
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Time:2012-10-18 01:16 am (UTC)
I have a Galaxy S 3 and am using Google My Tracks, and I get the same way-to-much altitude change on my stats.
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loser_variable
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Time:2012-10-18 03:13 am (UTC)
Rock on. Love the outdoor running. My garmin is excellent with distance but not so good with elevation.

I see you run at night sometimes. I do as well, especially in the winter months when it's dark before and after work. Unsolicited advice: Don't know if you ever run in dimly lit areas but I use a Petzl Tikka XP2. Leaf piles, sticks, storm drains, they're all waiting to take out your ankle. I once nearly ran into a parked car on a tree lined, unlit street. It is ostensibly a headlamp, but the elastic band adjusts to a very large size. I wear it just under the chest where I find it illuminates the path perfectly. It's bright and I'm getting 100+ hours on regular AAAs. Don't know how I ever got along without it.
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whipartist
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Time:2012-10-18 07:45 am (UTC)
Thanks.

Right now I'm running in well-lit areas, and on streets that I know like the back of my hand. There's one block that I route around because it's kinda dark, and the pavement is crappy.
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[icon] Corollary to yesterday's entry - Patti
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