View Poll Results: Where do you derive sprint wattage numbers?
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Attn:Power Freaks. What is a sprint?
01-31-08, 11:40 PM
#26
Killing Rabbits
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+1 WR's post was excellent.
Thank you for your plot and input.
In Enthalpic's "put up or shut up" vein, here's a screenshot of the last minute and change of a late season crit, where I won the pack sprint (2nd overall, late attack stayed away -- this is the PUR Tour Men's Cat 3, for any Ohio residents).
- 1 minute out there was a little kicker of a hill that reshuffled the pack. 700+ watts for about 20 seconds to stay on the wheel I wanted.
- 25 seconds out he attacks (I thought he would go early, which was why I wanted his wheel!) I hit a little under 1k watts to hold his wheel.
- last 5 seconds jump him and bike throw, 1k+ watts
In training, I can do 1450w 5seconds, but I've never hit over about 1250 in a race. In this particular race, a big deciding factor was that the first part was very negative and slow, so the last 20 minutes was pretty intense. I had an NP of 350w for the last 20 minutes.
- 1 minute out there was a little kicker of a hill that reshuffled the pack. 700+ watts for about 20 seconds to stay on the wheel I wanted.
- 25 seconds out he attacks (I thought he would go early, which was why I wanted his wheel!) I hit a little under 1k watts to hold his wheel.
- last 5 seconds jump him and bike throw, 1k+ watts
In training, I can do 1450w 5seconds, but I've never hit over about 1250 in a race. In this particular race, a big deciding factor was that the first part was very negative and slow, so the last 20 minutes was pretty intense. I had an NP of 350w for the last 20 minutes.
01-31-08, 11:50 PM
#27
Making a kilometer blurry
First, I latched on to an attack, which was about as hard as the sprint. Then I held over 500W for about 20s as I settled into the draft. Another guy attacked from behind, so I had to go before he got around me.
So, we all know that reproducing best efforts isn't possible or necessary in races. Everyone is going to be capable of some % of their best sprint power at the end of the race, depending on how they got there. Having a higher max to take a % of is going to help.
02-01-08, 12:00 AM
#28
Making a kilometer blurry
Ok, between curveship's and mine, we both had about 1 minute of crap to deal with before the finish.
02-01-08, 02:52 AM
#30
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I look at the zones. Neuromuscular power is most evident at the 5s duration. It would be pure max, but measurement of max is iffy with the PowerTap at least. 1m power is anaerobic capacity, and for me, this is more defining of my performance in a sprint.
When I think about what it takes for me to get around someone's wheel, my 5s power is a big player there -- even if I'm tired. To get to that point, I need anaerobic capacity for all the **** that went down to get to that point.
So, when I think of my sprint, it's 1527W 5s, and 721W 1m. Those numbers, together, are what I'm going to utilize in the final kilo.
If someone asks my sprint power, I'll say "1527W for 5s." Nobody's ever asked, of course
My max power of 1622W is nice to know, but I'm not sure it's accurate (I've hit over 1600W four times though), and I clearly can't maintain it.
When I think about what it takes for me to get around someone's wheel, my 5s power is a big player there -- even if I'm tired. To get to that point, I need anaerobic capacity for all the **** that went down to get to that point.
So, when I think of my sprint, it's 1527W 5s, and 721W 1m. Those numbers, together, are what I'm going to utilize in the final kilo.
If someone asks my sprint power, I'll say "1527W for 5s." Nobody's ever asked, of course
My max power of 1622W is nice to know, but I'm not sure it's accurate (I've hit over 1600W four times though), and I clearly can't maintain it.
02-01-08, 03:58 AM
#31
部門ニ/自転車オタク
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A person like WR is the reason I go for the win from 3 to 5 minutes out.
Oh yeah... I use 5 sec numbers only because the cpeaks power profile does. It's a zone. If they can do 300 more watts than me in 5 sec power when training, there's a good chance they can do the relative amount more than me at the end of a race if we did equal work. So, I need to do less work to be fresher, or go earlier. But to compare raw numbers, I compare a fresh 5 second to a fresh 5 second.
Oh yeah... I use 5 sec numbers only because the cpeaks power profile does. It's a zone. If they can do 300 more watts than me in 5 sec power when training, there's a good chance they can do the relative amount more than me at the end of a race if we did equal work. So, I need to do less work to be fresher, or go earlier. But to compare raw numbers, I compare a fresh 5 second to a fresh 5 second.
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Last edited by NomadVW; 02-01-08 at 04:04 AM.
02-01-08, 07:42 AM
#32
Making a kilometer blurry
This year I'm hoping to bring an answer to that question though. I think my FTP is up about 20W now, after 2 months. I have a looong way to go though. Hope I can get to 335W by Pace Bend (end of Feb). But that's still only 4.1 W/kg
Of course, I just need the draft of that attack...
02-01-08, 08:54 AM
#33
wavylines
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Nice! Your chart brings up another point: given that your 700+w was only getting you ~22mph, I'm assuming this was an uphill sprint. In general, I've found that uphill finishes favor long sprints (like in your file) b/c there's less advantage to drafting. Flat sprints favor short efforts, b/c the draft is so strong no one can stay out front long before being jumped, so you want to hit it in the last few seconds.
02-01-08, 09:10 AM
#34
Making a kilometer blurry
Nice! Your chart brings up another point: given that your 700+w was only getting you ~22mph, I'm assuming this was an uphill sprint. In general, I've found that uphill finishes favor long sprints (like in your file) b/c there's less advantage to drafting. Flat sprints favor short efforts, b/c the draft is so strong no one can stay out front long before being jumped, so you want to hit it in the last few seconds.
02-01-08, 09:45 AM
#35
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It also depends on if you're a Pettachi type sprinter or McEwan. I can't hit the really high peak numbers, but I can hold a relatively high number for a long long time. I typically start my sprint before everybody else, and hold it to the line while everybody tries to play catch up. Typically my sprints are around 1200-1300 held for a long time. Looking at my WKO+, I've done 1000+ for 30 seconds a few times.
02-01-08, 08:38 PM
#37
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The way I figure it they'd have to break down the cat's into climbers, sprinters and TTers. That way I could apply my mediocre climbing skills against all the sprinters, my poor sprint against the climbers, etc.
