Originally Posted by goggalor
Vaughters thinks those numbers should be "HUGE news"... even though a guy like Flandis is way down in 34th, and Wiggins 2012 beats Lance anno 2000 and 2002.
It cracks me up how you guys lap this sh!t up. Did you not understand the above posts that said it is a meaningless way to analyze performance?
besides if you check the actual link it is a post made by same random on a Finnish website 2 days ago. So where does Vaughters say "those numbers" and is specifically referring to the post on www.fillarifoorumi.fi??
It's certainly not something that I would bet on unless I had spent time doing a thorough analysis to first check and see if that poster has done it correctly to begin with. It seems clear they are using VAM to determine w/kg but have they corrected for altitude and gradient for example?
On doping matters I would take whatever Ferrari says with a grain of salt, but on pure performance matters I can see no reason to dispute the below....
VAM: Effects of Gradient & Altitude
By: Michele Ferrari
Published: 19 Jun 2009
When evaluating the VAM of a certain climbing performance we need to consider wind, drafting, asphalt conditions but also average SLOPE GRADIENT of the climb and the ALTITUDES at the start and end of the ascent.
There is quite a difference between a VAM obtained on an average gradient of 10% than one with the same value but obtained over a climb at 7%.
Over the years I have been putting together and using a simple formula which is useful when comparing VAM's expressed over different gradients.
For example, a VAM=1800 m/h corresponds to a different value in watt/kg, depending on the average gradient of the climb:
- gradient 11% 1800/3.1 = 5.80 w/kg
- gradient 10% 1800/3.0 = 6.00 w/kg
- gradient 9% 1800/2.9 = 6.20 w/kg
- gradient 8% 1800/2.8 = 6.42 w/kg
- gradient 7% 1800/2.7 = 6.66 w/kg
- gradient 6% 1800/2.6 = 6.92 w/kg
It is therefore simply enough to subdivide the VAM value with a certain number, between 2.6 up to 3.1, in accordance with the steepness of the climb (from 6% to 11%).
At higher ALTITUDES, barometric pressure and the partial oxygen pressure (PpO2) reduce by about 6% every 500m of elevation.
A very interesting study (J.Appl.Physiol. 1996;80:2204-2210) verified in laboratory how 11 elite cyclists (VO2max = 77ml/kg/min) presented an average decrease in their VO2max by 6.8% at an altitude of 580 m, compared to sea level values.