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Wednesday, September 15, 2010 |(21:42) Tour de l'Avenir: power calculs
Julien Pinot Etupes coach at CC and doctoral student at the University of Besancon, calculated for
http://www.directvelo.com - the Power of favorites used th the race against the watch at Risoul, the Tour de l'Avenir. Unsurprisingly, Nairo Alexander Quintana stuns his rivals with an average power of 5.87 W / kg in the 12.6km climb to 7%.
The commentary Julien Pinot:
"The former have achieved very high powers and are separated by large gaps. The Colombian Quintana is well above the lot and would soon show his qualities in the professional climber, especially since it is only in its second years hope. The French climbers (Bardet, Bonnin), relegated to over 2'30'', appear at what they had done already made the dry season on a climb: the San Carlo during the Tour of Country Savoy. Talansky, the second stage, for its part, well above its performance time (5.40W/kg). It seems to be in top form at the end of the season carries since performance much higher than the Ronde de l'Isard and the Tour of Pays de Savoie.
The overall level of the Tour de l'Avenir was particularly high when compared with the half-step with the rise of the San Carlo on similar timetables, only reached the Talansky 5.4 W / kg while on the rise Risoul, there are eight runners to exceed this level of performance. However, we must take into account the fact that this rise has been performed against the clock, so no race strategy assumed a more regular rhythm and of the possibilities of each. But this step came at the end of eight days of racing. "
Recall the method of estimation:
The first 800 meters against the clock being in town, we suppose 1'05 stable for all (about 5 seconds). The powers are calculated on a standard weight of 70kg with 8 kg of equipment.
And you, what power would you open?
If you want real power get your gross, to say the power that you have obtained with a power sensor:
1 / Multiply by 70 the power in W / kg
2 / Divide the wattage (W) you find 70 to the power 0.79
3 / Multiply this figure by your weight to the power strip 0.79 (assuming that the weight of your gear and bike clothing is 8kg, if not add to your weight).
Example: Jonathan Fumeaux (weight: 62kg): 4.94 W / kg.
1 / 4.94 * 70 = 345.8
2 / 345.8 / (700.79) = 12.06 W / kg 0.79
3 / 12.06 * (620.79) = 314 W to 37'31 by this indirect method of calculating
Source:
http://www.directvelo.com/direct-velo/actualites/10076/tour-de-l-avenir-calculs-de-puissance-.html