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Old 10-04-07, 07:30 PM   #1
DrWJODonnell
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Wattage of Backstedt

A recent interview of Magnus Backstedt at interbike led to a few revelations on a pro's wattage...

Referring to sprinting
Quote:
VN: What kind of wattage are you putting out when you do that?

MB: Full sprint? After a 200k ride about 1900 watts. Fresh, basically going out training and ten minutes into a ride doing a full kick when I'm going well over 2000.

VN: Wow, is that for one reading or is that for a couple seconds?

MB: We're talking probably the best part of two seconds at least.

VN: Wow, no wonder they have to stiffen the bottom bracket. That's a lot of torquing right there.
and then later when asked about his longer term power...

Quote:
VN: Well, thanks for your time, we...

One more question. What's your wattage for like, a half an hour? Our readers want to hear that.

MB: (laughs) A half hour? I generally do...a twenty minute ride, I average about 535.
I have searched the net and he is listed as 6'3" and between 90 and 94 kilos (198 ad 207 lbs). Just thought someone might be interested.
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Old 10-04-07, 07:50 PM   #2
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535 is about what I estimated leipheimer averaged for the TOC prologue.
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Old 10-04-07, 08:20 PM   #3
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A recent interview of Magnus Backstedt at interbike led to a few revelations on a pro's wattage...

Referring to sprinting


and then later when asked about his longer term power...



I have searched the net and he is listed as 6'3" and between 90 and 94 kilos (198 ad 207 lbs). Just thought someone might be interested.
Its quite a useless stupid answer by him. 2 seconds? What an idiot. His 5 second avg would drop quickly to about 1500 (end of race) and 1600 fresh....his 15-25 second avg would be far further down again (similar to what Zabel was refering too...around 1200-1300 watts tops).

I like Zabel - he speaks in real terms. Only a d$%khead would run around quoting airy fairy 1-2 second wattage to the press.

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Old 10-04-07, 08:25 PM   #4
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Doesn't matter. 535 is close to double my watts for twenty minutes. Allen/Coggan's chart is on crack.
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Old 10-04-07, 08:29 PM   #5
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I'd hang with him for about 12-13 minutes on a climb...
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Old 10-04-07, 08:39 PM   #6
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At least I weigh 25% less. So I might be able to hang for five.
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Old 10-04-07, 08:42 PM   #7
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WTF.....the only thing I can say is I bet I could kick his ass in a bar fight.....
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Old 10-04-07, 09:29 PM   #8
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Its quite a useless stupid answer by him. 2 seconds? What an idiot. His 5 second avg would drop quickly to about 1500 (end of race) and 1600 fresh....his 15-25 second avg would be far further down again (similar to what Zabel was refering too...around 1200-1300 watts tops).

I like Zabel - he speaks in real terms. Only a d$%khead would run around quoting airy fairy 1-2 second wattage to the press.
I agree. A power reading is probably not going to be accurate over just one or 2 seconds because the crank speed, w (P=T*W) can not be well established within such a small period, especially if there are accelerations when sprinting. Unless his meter has a sample rate >20Hz or so, those numbers mean nothing. does anyone know the sample rates of power meters?

Disregarding the speed component of the power, it does indicate he can produce some ridiculous torque (its measurement is not time dependent). But then again he weighs 95 kilos, and needs every bit of that power to push him toward the finish line.
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Old 10-05-07, 03:52 AM   #9
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200 Hz for the SRM and 60-70 Hz for the PT.
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Old 10-05-07, 05:01 AM   #10
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I'm surprised that there's so much distaste. It's not like he's quoting "off the chart" numbers for his size. I mean, c'mon - he's 90+ kg. Sheer gravity of that weight is going to push the numbers up. Even if his 5 second power was 1900, @ 90kg we're still talking low domestic pro based on track sprinters. But if it's only 2 seconds, then his 5 second is probably down in the 1700 range at best, pretty far down the chart when we're talking pro riders in w/kg.

I'm more impressed with the 535 watts for his 2x20's. Yeowch. Interestingly it's just shy of the "magic number" of 6 w/kg if he's 90kg.
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Old 10-05-07, 06:16 AM   #11
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I agree, those numbers are impressive and believable. Looking at a power chart, if the data is continuous, there's nothing wrong with pulling out a 2-second sample. The crank cadence will also be continuous, and reasonable, over 15s.
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Old 10-05-07, 06:59 AM   #12
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According to kreuzotter he would need 535 watts to keep up with me on a climb, I can do 375 watts for 20 minutes on my road bike while fresh up a climb. 8% grade for him to average 11.6 mph like I did he would need 540 watts.

I also weigh 133lbs @ 6'.
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Old 10-05-07, 07:07 AM   #13
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200 Hz for the SRM and 60-70 Hz for the PT.
Those are the sample rates for torque. Rotational velocity is sampled once per revolution (reed switch).
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Old 10-05-07, 07:08 AM   #14
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According to kreuzotter he would need 535 watts to keep up with me on a climb, I can do 375 watts for 20 minutes on my road bike while fresh up a climb. 8% grade for him to average 11.6 mph like I did he would need 540 watts.

I also weigh 133lbs @ 6'.

Is that according to kreuzotter, or according to your PT/SRM?
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Old 10-05-07, 07:19 AM   #15
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According to kreuzotter he would need 535 watts to keep up with me on a climb, I can do 375 watts for 20 minutes on my road bike while fresh up a climb. 8% grade for him to average 11.6 mph like I did he would need 540 watts.

I also weigh 133lbs @ 6'.
You're a stick. Or Rasmussen...
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Old 10-05-07, 07:24 AM   #16
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Is that according to kreuzotter, or according to your PT/SRM?
PT gave me the power average.
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Old 10-05-07, 07:25 AM   #17
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You're a stick. Or Rasmussen...
Nah, I'm not a skinny as Rasmussen.
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Old 10-05-07, 07:31 AM   #18
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PT gave me the power average.

You need to start doing mountainous stage races. ASAP.

You will blow the doors off of everyone in the 3s if you are putting out 6w/kg for 20min...
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Old 10-05-07, 08:08 AM   #19
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According to kreuzotter he would need 535 watts to keep up with me on a climb, I can do 375 watts for 20 minutes on my road bike while fresh up a climb. 8% grade for him to average 11.6 mph like I did he would need 540 watts.

I also weigh 133lbs @ 6'.
If that is accurate (and true) than those are pro level numbers and you will be 2 then 1 in no time if you know how to race and race frequently.
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Old 10-05-07, 08:20 AM   #20
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Nah, I'm not a skinny as Rasmussen.
You sound like a poster-child for an eating disorder

133 lbs @ 6': "I'm not as skinny as..."
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Old 10-05-07, 08:25 AM   #21
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If that is accurate (and true) than those are pro level numbers and you will be 2 then 1 in no time if you know how to race and race frequently.

Or, just go for a ride with a local Pro or Cat1, show them what you're made of, and they can upgrade you to the 2s.
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Old 10-05-07, 08:32 AM   #22
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Its quite a useless stupid answer by him. 2 seconds? What an idiot. His 5 second avg would drop quickly to about 1500 (end of race) and 1600 fresh....his 15-25 second avg would be far further down again (similar to what Zabel was refering too...around 1200-1300 watts tops).
How is 2s meaningless? 2s power is the difference between getting on a wheel as it comes by and fighting to catch it.

Or are you saying that it's not an accurate measure? I don't see how you need a 40 samples of the crank to get a usable number. Every time it comes around you know how far it's moved in how long. If you have tourque at 200hz you can get average power for that rotation pretty easily. Taking 4 points above 1900 then seems pretty reasonable.
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Old 10-05-07, 08:38 AM   #23
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Only a d$%khead would run around quoting airy fairy 1-2 second wattage to the press.
True Dat
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Old 10-05-07, 08:48 AM   #24
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Or, just go for a ride with a local Pro or Cat1, show them what you're made of, and they can upgrade you to the 2s.
**** they'll be recruiting him for their team to be their climbing specialist!
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Old 10-05-07, 09:29 AM   #25
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You need to start doing mountainous stage races. ASAP.

You will blow the doors off of everyone in the 3s if you are putting out 6w/kg for 20min...
I do well in mountains stage races, but that ride only gave me 7th in the uphill TT, Thad Dulin(jittery joes) beat me by over 3 minutes. IDK they guy who's powertap it was hasn't been having any trouble with it I know of but maybe the number was off, its only the second time i've ridden a powertap.

I read somewhere that Boonens 5sec power was ~1600 at the end of a race.
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