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Ran a 10k - Official Thread (31 Viewers)
- Thread starter Ned
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Dr_Zaius
Footballguy
Was thinking about this last night probably way longer than is healthy. I think that the answer to 1. is B) because in order to run your target line you have to push off at a slight angle to correct for the wind blowing you off course, so only the cos() of this angle gets applied to forward momentum. For size of effect, you need the cross-sectional area and mass of the runner (I suppose elevation, attire, body hairiness, and ground contact time also play a role, but can probably be ignored). I was going to make an attempt to quantify this, but then I realized it would take a lot of effort and I'm feeling lazy.
If this is the correct way to think about it, interestingly if you just ran normally in a giant field or parking lot and let the wind blow you slightly to the side as you went, I think the wind would actually aid you because you are travelling a bit more with each stride due to the horizontal movement. So, you'd get some "free" speed that would register on your GPS, similar to running on a moving cruise ship, but obviously a much smaller effect.
I'll see myself out...
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pbm107
Footballguy
This article gives a calculation for the impact of 16m/s or ~36 mph crosswind which estimates it slow down an 18:00 5K to a 20:09. This is obviously an extreme example, but I think running with a 7 mph crosswind would slightly hinder performance.
Juxtatarot
Footballguy
Next question:
If a man runs west at 7 mph and the wind is blowing at 7 mph directly out of the SE, would the wind effect be perfectly negligible? (The resistance fighting against going north would cancel the push from behind.)
ChiefD
Footballguy
ChiefD
Footballguy
So, what does your race day weather look like this week?
I'm shooting for Saturday morning. 8 am. Supposed to be 38 degrees with a 7 mph wind out of the south/southwest. Perfection.
My course is going to be a net downhill but will have that wind in my face for the last mile or so.
I'm shooting for Saturday morning. 8 am. Supposed to be 38 degrees with a 7 mph wind out of the south/southwest. Perfection.
My course is going to be a net downhill but will have that wind in my face for the last mile or so.
Juxtatarot
Footballguy
I've been thinking about these questions for years although mostly in one minute intervals while running. It all started when I thought, "why does it seem like the wind is blowing against me when traveling in 3 out of 4 directions?"
ChiefD
Footballguy
Here is what I usually ask myself during those times:
Why am I doing this? This sucks.
-OZ-
Footballguy
MAC_32
Footballguy
5 days out even the best weather resources don't know what your weather will be like - that day's weather is sitting out somewhere in the pacific right now. Model's will stabilize once it nears landfall. The temp's may be about right, but things like wind direction? That's really just an educated guess.
I just mapped out my week and I'll try to make a decision on a day before my Wednesday workout - or at least I'll decide if I'm doing it Thursday or not. If the wind's blowing in the right direction and I'm sufficiently recovered from last week then I want do it then. Conditions will be ideal (high 30's, partly cloudy, 9-15ish mph wind), but winds may be from some semblance of the north. That's a deal breaker on my route options. I can make anything work from W to E going S, but not N.
tri-man 47
Footballguy
Weather will be quite ideal later this week ...morning temps around 40 and light wind. I'm tentatively shooting for Thursday morning. ( @Juxtatarot, I'll just run the 5K on the familiar streets of my neighborhood. Maybe we hook up with @Brony for the 10K ..and also pick up @Alex P Keaton for the June miler).
Dr_Zaius
Footballguy
I've had the same exact thought, and I think there's a few reasons. It's very rare to have the wind exactly perpendicular to you, and the tail/head component goes with the sine, which is not linear (e.g. 10mph 30 degrees from cross = 5mph head or tail, 45 degrees ~7mph head or tail). So, close to 100% of the time you will have effectively either a tail or a head wind. Also, if the tailwind is less than your forward speed, you are still fighting wind resistance because you are running faster than the wind is carrying the air, so you will feel you are fighting the wind more than half the time.
Finally, unless you run on a flat grassland/prairie, trees and buildings will make the wind swirl and change direction many times during your run, and confirmation bias being what it is, if theses obstructions alternate over and over between giving you a tail and headwind, your mind is more apt to remember the times it was a headwind.
ChiefD
Footballguy
I need to do Saturday just because I need the next 5 days to sober up from this stay-at-home order.
MAC_32
Footballguy
I'm not even bothering with the trails. They will be full of enough of the oblivious to force me off the path with enough frequency for annoyance and impact on performance. The routes I mapped minimized the potential for messy decision making at intersections and any corners can be cut if there are people in the way. I'm also lucky to live where I do - it's a relatively densely populated burb but traffic isn't crazy vs other cities and there's generally room to run on the street if I encounter people on the sidewalk. The biggest issue I should have is a vehicle sliding into a crosswalk at a stop sign when I have the right of way, but it's rare for there to be more than one car in these situations so I can usually safely slide behind it.
I'm not necessarily doing this during the week. I'd just like to. Less cars (and bikes!!!) out and about on Thursday's. I just decided a game of frogger but with the wind at my back is optimal to the alternative. No math or science though.
xulf
Footballguy
At the moment I have windows on Thursday or Saturday. I'm planning an early morning run just as the sun is coming up to negate pedestrians and cars as much as possible (though we did have an angry owl attack a woman right by my house at this time a couple days ago). Should be upper-30s/lower-40s at the start.
I have a couple route options depending on the wind that day. There is a route with a slight downhill that I am looking into, but it crosses a kind of busy road at a round-about, at the midway point. I can bail out to the right and cross over later, but that bail out is up a bit of an uphill, which I want to avoid.
As @MAC_32 mentioned, I'm a bit worried about congestion on the paths. I may decide to go all streets, which would nix my above route.
I have a couple route options depending on the wind that day. There is a route with a slight downhill that I am looking into, but it crosses a kind of busy road at a round-about, at the midway point. I can bail out to the right and cross over later, but that bail out is up a bit of an uphill, which I want to avoid.
As @MAC_32 mentioned, I'm a bit worried about congestion on the paths. I may decide to go all streets, which would nix my above route.
Dr_Zaius
Footballguy
That's where I'm at. If the wind forecast is to be believed, there is a trail about 20 minutes away that would take advantage of it nicely, but I'm 90%+ sure it will be crawling with people so I've ruled it out. So, I'm either going to try to time the track to when there's almost nobody there or run the path near my house that I know will have almost no one on it regardless of time of day.
Juxtatarot
Footballguy
JAA
Footballguy
Brony
Footballguy
gianmarco
Footballguy
MAC_32
Footballguy
gruecd
Footballguy
Dr_Zaius
Footballguy
Yes.
Zoom happy hour while the captains run their legs with their phones in their hand mac-style.
gruecd
Footballguy
Zasada
Footballguy
Encouraging run this morning. Rest day yesterday. Cool temps this morning (just about perfect, actually), but with a meaningful headwind for the 2nd half of the run.
After a slow first 1K, I increased the pace over the course of the run. Such that I finished the last 10K in less than 46 minutes. Haven't done that in a while.
Still didn't get any time at my PR 5K pace, so expectations for that later in the week are low. But now slightly higher than what they were a couple of days ago.
...and then @Juxtatarot throws down a la-di-da 10K at a 4:40/km pace (131 avg HR) this morning just to remind me how slow I am!
After a slow first 1K, I increased the pace over the course of the run. Such that I finished the last 10K in less than 46 minutes. Haven't done that in a while.
Still didn't get any time at my PR 5K pace, so expectations for that later in the week are low. But now slightly higher than what they were a couple of days ago.
...and then @Juxtatarot throws down a la-di-da 10K at a 4:40/km pace (131 avg HR) this morning just to remind me how slow I am!
Juxtatarot
Footballguy
And I didn't sleep well at all last night. I think I should give up on trying to figure out why my heart rate has good days and bad days recently. Every time I think I have it figured out, something happens to surprise me.
bushdocda
Footballguy
I rested yesterday, had lead legs this morning that I tried to spur on with some strides and burned 666 calories per Strava.
Thanks for the weekly reminder not to compare to Juxt.
JShare87
Footballguy
Was feeling amazing up until Sunday. I let my dogs outside, and the little one started chasing something. All I saw was a black snake, so instincts kicked in and I accelerated after him. I completely forgot about my knee and think I tweaked it pretty bad. We live on a lake and have had water moccasins in the yard from time to time. This snake turned out to be a harmless black snake. Really bummed about it. The past 2 days have sucked. Knee is in pain and it hurts to walk. Hoping it goes away but not so optimistic. 5K isn’t happening. I just hope I can run again one day. Trying to stay positive but it’s consumed my thoughts the past 2 days.@JShare87 - nice job getting out there.
How is the knee feeling? Are you able to take a normal stride or do you find yourself favoring it a bit?
Zasada
Footballguy
Fingers crossed that it's just a minor setback. Reset your rehab -- you were walking lots prior to this, and on a good path. You'll get back on it again. I'll be sending good vibes east.
Zasada
Footballguy
OK, #BMFs. Here's the plan for my 5K.
Either Thu am or Sat am. I'm going to run the same route I ran this morning, and simply add up KMs 2 through 6 to count as my 5K. I'm not going to bother with starting/stopping my watch since it's set to auto-lap at each KM anyway. That way I don't have to add three runs to my Strava, and/or worry about starting/stopping as I'm running.
The course has some corners, but is largely flat (this is DFW, after all). Wind doesn't look to be material on either day.
Raise your objections now, if you have any! I can't imagine any are more legit than running the 5K on a track!
Either Thu am or Sat am. I'm going to run the same route I ran this morning, and simply add up KMs 2 through 6 to count as my 5K. I'm not going to bother with starting/stopping my watch since it's set to auto-lap at each KM anyway. That way I don't have to add three runs to my Strava, and/or worry about starting/stopping as I'm running.
The course has some corners, but is largely flat (this is DFW, after all). Wind doesn't look to be material on either day.
Raise your objections now, if you have any! I can't imagine any are more legit than running the 5K on a track!
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ChiefD
Footballguy
Juxtatarot
Footballguy
I don't have an objection but it just seems weird to me. What's the harm of having three Strava runs?
gruecd
Footballguy
Agreed. I think it should be a separate 5K entry in Strava. Also put FBG5K in the title.
Zasada
Footballguy
When I run my mile, I'm going to have to do that, but with Strava auto-lapping each KM for me, I can save the hassle of having to stop my watch after the first km, save the activity, and then restart the watch and get running again.
This way, I know to just up my pace after the first km beeps, and then run hard until the 6th km beeps. Same precision, if not better!
gianmarco
Footballguy
Not sure this is a good idea. So that it's easy to compare for everyone, I would think you just need to stop when you hear the beep. Stop and save and then restart. It shouldn't take but 30-60 seconds to get all that done and then start running again. The total run entry in Strava should be 5K, not buried within a longer run.
ChiefD
Footballguy
Can you switch the dang thing to MILES for this race? That KM thing that scrambles my brain. Thanks in advance.
Zasada
Footballguy
I figured the objections would come regarding something about the course I chose. Not some torrent of "math is hard" stuff.
ChiefD
Footballguy
gianmarco
Footballguy
The math isn't hard. But I don't want to have to look at your 5K and figure out where the extra 0.1 is figured in.I figured the objections would come regarding something about the course I chose. Not some torrent of "math is hard" stuff.
gianmarco
Footballguy
Wait til they see the course I'm gonna run. Straight downhill and I don't care.
You and me both, GB.
