how much time do you think the wind cost you?
personally, i didn't think the wind in Chi was a factor until the last 5k - it was tough going on Michigan Ave. - but i don't think it cost me more than 30 sec.
how much time do you think the wind cost you?
personally, i didn't think the wind in Chi was a factor until the last 5k - it was tough going on Michigan Ave. - but i don't think it cost me more than 30 sec.
hmmm . . . I'd say a little more than 3 minutes. I ran a 3:03.
how close were you to being on pace late in the race?
right on pace through mile 22; last 2K were especially tough
axelrod wrote:
right on pace through mile 22; last 2K were especially tough
That's kinda how the marathon works, though.
I went from running 5:45-50 to 6:00, 6:06, 6:25, 6:35. Since the last 2 are straight into the wind and I was damn near sprinting the last two miles I'd say the wind was worth about 30 seconds the last two miles. The miles from the start to mile 7 were into the wind, but with the downtown buildings and other runners to block the wind I'd say it was worth anywhere from 0-5 seconds per mile. Then there were miles 13-15 straight into the wind pretty much by myself...that was worth maybe 5-10 seconds a mile. The effects of the wind depend on how many runners you have around you and how many tall buildings you have around you. There were times when it felt like the wind was coming from everywhere. I'd say the wind was worth about 2 minutes 46 seconds. I ran 2:32:45...:)
PS: You also have to figure that if you were on pace into the wind you were actually too fast.
Alan
"You also have to figure that if you were on pace into the wind you were actually too fast."
i think that's what happened to me - i was a bit ahead of pace into the wind in the early miles. came back to haunt me in the end, not much, but enough to hurt me over all
and i agree, the wind did seem to swirl around in certain neighborhoods... without a change in running direction i felt myself getting pushed one way and then the other
From the best running calculator online.
-20 mph (-8.9408 m/s) -9.6% 3:15.4 5:14.4
-15 mph (-6.7056 m/s) -8.7% 3:17.1 5:17.2
-10 mph (-4.4704 m/s) -6.8% 3:20.8 5:23.1
-5 mph (-2.2352 m/s) -3.9% 3:26.3 5:32.0
0 mph (0 m/s) 0.0% 3:33.8 5:44.0
5 mph (2.2352 m/s) +4.9% 3:43.0 5:58.9
10 mph (4.4704 m/s) +10.8% 3:54.2 6:16.9
15 mph (6.7056 m/s) +17.7% 4:07.2 6:37.8
20 mph (8.9408 m/s) +25.6% 4:21.9 7:01.5
I choose 5:44/mile pace as the base as this would result in a 2:30 marathon.
From calculations derived from Daniels, an equivalent mile into a 20 mph headwind would be 7:01 (+87 sec), while with the same wind would be 5:14 (-30 sec). On a loop course such as Chicago, we could awesome 13 miles with the wind, 13 into it. This would result in a net added time of roughly 10 minutes (net add of 47 sec * 13 miles).
Being a little more realistic, we could say: 6 miles headwind, 6 miles tailwind, 13.2 miles negligible wind. This a more realistic effect of roughly 5 minutes.
To be honest, being able to run in a group took a little off of this 5 minute effect.
I know that it made LaSalle feel like an eternity, and didn't help me at all coming back in. There was actually a point, where I was in a cross-wind, and a gust almost blew me, and the guy next to me, over.
and that takes energy away from your forward movement... but is there any way to objectively measure that?
I ran LaSalle marathon and it was windy but 5 minutes? Come on man, try about 90 seconds at best! Everyone was together the first 1/2 the race in nice packs so that part of the race was fast. Then things get alittle stretched out. But 5 minutes in the last 13 miles? No, at best 90 seconds. I'd love to say hey no winds then I'm in the trials but things don't work that way. Chicago is a very fast course w/ winds always around 10 miles an hour on a great day. So the winds were really about 7 to 10 mph fast.
I'd say ~3 minutes in Detroit. About 30 seconds on belle isle, another 30 coming back over the bridge and about 30-40 seconds/mile over the final 3 miles dead into the wind.