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Aleksandr's training is public on his Strava: https://www.strava.com/athletes/26934035 https://www.strava.com/athletes/26934035 Something to remember is that t
by ryannevius 4y ago
Aleksandr's training is public on his Strava: https://www.strava.com/athletes/26934035 https://www.strava.com/athletes/26934035
Something to remember is that this is his pace _after_ pit stops, so his actual running pace was faster. Also notable is that this course was kind of terrible, with four 90 degree turns and three 180 degree turns each lap for 209 laps. There's little doubt that he could run > 200 miles on a course with fewer turns.
- c-fe 4y agoStrava also shares the latitude/elevation during the run. (Screenshot in case you dont have Strava https://imgur.com/PuuKo5r https://imgur.com/PuuKo5r) What I find interesting and don't really understand is why the elevation keeps going down during the run, even though he stayed on the same track. Anyone have an idea why that could be?
- hammock 4y agoIt’s probably based off of a barometer in a watch, not GPS, and the air pressure was changing
- folli 4y agoYes, a high-pressure area was moving over Italy the last couple of days.
- gorkish 4y agoThe elevation in this case is just a proxy for storing the barometric pressure, which is because the actual air pressure is the important thing to track if you are trying to normalize against athletic performance. If the watch logged the GPS altitude, it would be a lot more accurate, but less useful as the air density would only be estimated..
- Lukas_Skywalker 4y agoAll GPS watches already calculate their altitude (GPS uses three dimensional trilateration for computing the position, so you must get the elevation because you must calculate the three dimensional position). The elevation measure is usually pretty inaccurate in Central Europe. Since the satellites are comparably low above the horizon, flat movements of the runner have a large effect on the run time of the signals coming from the satellites, while vertical movements do not really change the run time and are therefore much more affected by any error. This is why most portals like Strava run a data correction by overriding the elevation data of the GPS track by tracing the path over their internal elevation model. The barometric elevation calculation is usually much more accurate and is constantly calibrated on the watch. This breaks down a little if you run for over 24 hours and the weather changes a lot. The drift over the 24 hours of this run amounts to about 8m over 2 hours, which doesn't really matter. And while air pressure can be used to normalize performance of the athletes, the absolute values measured by the barometer are usually pretty inaccurate, while the relative changes are quite accurate. Therefore, they can be used to measure climb/descent, but not really for an absolute air density measurement. Source: I have worked on a GPS wearable (without barometric pressure sensor).
- milansuk 4y agoI downloaded .gpx of the run and it's 6.7MB. He started with 4min/km pace, held it for 130km(9 hours) and then He "slowed down" almost linearly to 5min/km when he finished.
- MuffinFlavored 4y ago4min/km = 6:27/mile roughly, I think? If I did the math correctly?
- folli 4y agoWhere did you get the GPX file from?
- mytailorisrich 4y agoI've taken to running during my lunch break in March this year and I can now run a 5k most days of the week at a 5:30 per km pace. So I can't even imagine how he does that.
- sirsinsalot 4y agoWow, my best ever 10k pace was 6min/km. 9 hours ag 4min/k is insane.
- speedgoose 4y agoI didn’t know you could get a watch with more than 24 hours of battery life including GPS tracking (COROS APEX Pro). The accuracy is a bit weird though, the elevation chart doesn’t make sense.
- jeltz 4y agoI ran for 8:30 with my ancient Forerunner 235 and it still had some batteries left. Modern watches can easily do 24 hours, even the mid range Forerunner 255 can do 30 hours and the larger 955 can do 42 hours.
- bakuninsbart 4y agoAll of the higher-end Garmin watches can do this, it is one of their main selling points. In normal use, I charge mine around once a week.
- dfc 4y agoI don't think it's that big of a deal for good running watches. I ran the JFK50 with a three year old Garmin 935 with a heart strap (HRM-Tri) in a little under 11 hours. My watch was close to 50%. That was with GPS updates every second. It would have been much better if I left it at the default, not the ultratrac or whatever they call the endurance battery mode.
- js2 4y agoIt's really only been the last few years that running watches could last >24 hours with GPS tracking enabled. I also have a Forerunner 935 which I've used for 24 hours, but I think I had it in ultra-mode where it takes GPS samples less often. Before that I had a Forerunner 230 and I had to charge that mid race during a 100-miler, which was fun to do while running (used an external battery, put the watch and battery in a running vest while running one of my laps). The latest watches which do 36 hours or more with full GPS accuracy are really amazing.
- Guillaume86 4y agoI knew the Garmin Enduro could do it, it can apparently do 80h of GPS tracking with solar charging: https://www.dcrainmaker.com/2021/02/garmin-enduro-gps-watch-in-depth-review.html https://www.dcrainmaker.com/2021/02/garmin-enduro-gps-watch-...
- georgecmu 4y agoHe's got the fly-bys enabled, too -- and you can watch the replay of the race with 20 other athletes: https://labs.strava.com/flyby/viewer/#7828119666?c=u0pf6j88&z=G&t=1Z9NxP&a=cqCX0ji7fNKpNKTS18B60nQ1etJ8JXrSPrJ-0tDBhNJ7hIXS229i0nTvetKQrLPSVjbM0sh6k9KxS53SgWp_0sono9JjlZXSEkC90tJDttItQsvSShqA0oUQq9LuVpHS1O-G0kZMhdIeNoXSiK-B0hOufNJSq3zSE1t70hM0edIyZXXS-K1l0p0cWdIcPVDSmkBO0uPsStIYQUrSHVtF0lCNONI https://labs.strava.com/flyby/viewer/#7828119666?c=u0pf6j88&...
- pedalpete 4y agoI don't really get flybys, but I'm jaded as the founder of Ayvri.com here's the run in 3D. It's a flat loop, so not very exciting. https://ayvri.com/scene/z15yoqwqjx/cl89ecl3b0001356i6w6jf6t1 https://ayvri.com/scene/z15yoqwqjx/cl89ecl3b0001356i6w6jf6t1
- grsmvg 4y agoThis is his actual running pace. Strava only calculates pace including the stops when you set the activity type to ‘race’, which he didn’t.