Alex Simmons/RST wrote:So what was Froome's W/kg during the Ventoux run leg?
I guess the emoticone


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Alex Simmons/RST wrote:So what was Froome's W/kg during the Ventoux run leg?
Fergoose wrote:Any chance of a calculation for todays last climb by Bardet and peloton? Or a comparison to any previous years on the same climb? It looked very ordinary and believable to me (with the exception of a couple of riders that I personally don't buy) and I'd be pretty surprised if it was over 6.0 w/kg despite being relatively short. Its the first climb of this years TdF where we've had the peloton going full tilt from early on and didn't seem as wind affected as other mountain stages, so it might be a suitable one for comparisons.
Alex Simmons/RST wrote:So on average the fastest riders in this tour were 100 seconds (7%) slower than Pantani et al.
Ranging from 42 to 160 seconds slower.
Why is 410W suspicious?
Le breton wrote:Alex Simmons/RST wrote:So on average the fastest riders in this tour were 100 seconds (7%) slower than Pantani et al.
Ranging from 42 to 160 seconds slower.
Why is 410W suspicious?
It's not the 410 W per se that Vayer deems suspicious, but 410/70 = 5.86 Watts/kg on the LAST climb of a heavy mountain stage. 70 kg = weight of std cyclist.
This for a 30-40 min. effort.
See here
http://sportsscientists.com/wp-content/uploads/2014/07/2013-vs-2014-Tour-power-outputs.png
Cheers
PS : Ventoux should have been excluded from the average I think (wind)
Le breton wrote:Alex Simmons/RST wrote:So on average the fastest riders in this tour were 100 seconds (7%) slower than Pantani et al.
Ranging from 42 to 160 seconds slower.
Why is 410W suspicious?
It's not the 410 W per se that Vayer deems suspicious, but 410/70 = 5.86 Watts/kg on the LAST climb of a heavy mountain stage. 70 kg = weight of std cyclist.
This for a 30-40 min. effort.
See here
http://sportsscientists.com/wp-content/uploads/2014/07/2013-vs-2014-Tour-power-outputs.png
Cheers
PS : Ventoux should have been excluded from the average I think (wind)
SeriousSam wrote:Alex, if you had to guess, who has the better aero coefficient with full TT equipment, Froome or Dumoulin?
Tonton wrote:Le breton wrote:Alex Simmons/RST wrote:So on average the fastest riders in this tour were 100 seconds (7%) slower than Pantani et al.
Ranging from 42 to 160 seconds slower.
Why is 410W suspicious?
It's not the 410 W per se that Vayer deems suspicious, but 410/70 = 5.86 Watts/kg on the LAST climb of a heavy mountain stage. 70 kg = weight of std cyclist.
This for a 30-40 min. effort.
See here
http://sportsscientists.com/wp-content/uploads/2014/07/2013-vs-2014-Tour-power-outputs.png
Cheers
PS : Ventoux should have been excluded from the average I think (wind)
I like his calculation method as described/detailed in "Not Normal", which I keep in that special folder with the Pinot studies. Some disagree with the accuracy, but it's proven to set a realistic bar, and from year to year compares apples to apples.
Alex Simmons/RST wrote:This was the 3rd slowest TdF since 1998. Only 2000 (just) and 2007 were slower, on average.
Not that it means much given year to year variability.
bikenrrd wrote:Alex Simmons/RST wrote:This was the 3rd slowest TdF since 1998. Only 2000 (just) and 2007 were slower, on average.
Not that it means much given year to year variability.
I've wondered whether it's possible to take into account amount of climbing when comparing Tour speeds across the years? Average gradient or some such could be used, but you'd have to retain the average speed as well.
bikenrrd wrote:Moved this here from the "Random French Guys" thread as it seems more relevant here.
One thing I've never understood about Vayer's method (and something that leads me to believe it's ill-formed) is that he computes a single figure for wattage that he considers suspicious - i.e. 410W, as above.
Now, I understand that he computes a W/kg ratio and multiplies it by a standard weight to attain the watts, no matter how heavy a rider.
This is flawed in another way, but I really want to know why he doesn't use the temporal aspect of the data. All of the climbs are timed, so why not express the figure in W/kg/s i.e. watts per kilogram per second, aka Joules per kilogram?
Anyone who's used Strava or Training Peaks or worked with a coach knows the power distribution graph which gives you the estimated power output over a certain time period. A climb that lasts for 20 minutes can be climbed at a higher power than one that lasts 30 minutes, and so the time should be taken into account.
Before I get flamed - I think his method (for calculating power, not identifying dopers) has merit but I'd like to see more scientific rigour attached to it. Openly publishing the method, for a start, and an exploration of the sensitivity of the method to the values chosen for the parameters (rolling resistance being one).
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