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Very interesting...some stats on power output from Vuelta, using VAM method:
Stage 14 - Puerto de Ancares (last 9 km, 8.2 %, 738 m). Joaquim Rodriguez: 25 min 48 sec, 20.93 Kph, VAM 1716 m/h, 6.09 W/kg
Stage 15: Lagos de Covadonga (Village Covadonga→next 8.0 km ,8.85 %, 708 m). Contador,Rodriguez: 25:01, 19.19 Kph, VAM 1698 m/h, 5.89 W/kg
Then Stage 16: Puerto de Pajares (last 10 km, 7.0 %, 70...0 m [678 m→1378 m]). Contador, Rodriguez: 27:02, 22.19 Kph, VAM 1554 m/h, 5.75 W/kg.
Obviously,we recognize that VAM on climbs is subject to issues around wind, and that once-off climbs are affected by tactics, but the numbers suggest that we're well below what we used to see (note that these are all quite short climbs, not the 40 min + of Galibier, Tormalet & Alp d'Huez), and it's not higher than this year's Tour. If anyone has SRM data to validate, let me know. These numbers courtesy @ammattipyoraily
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Just a comment on these - if you've watched the Vuelta, you'll have been struck by a) the aggressive nature of the racing. It's attack and counterattack, fast then slow, and b) how different this is from the Tour.
So the numbers you see above are in part a reflection of the aggressive tactics, because it's likely that Contador is raising the power for a minute, and then recovering for a few once Rodriguez bridges that early gap. The Tour was characterized by the solid, "one-paced" tempo of Sky, and OVERALL performance is typically higher with that kind of racing. The stochastic Vuelta is exciting, but if you're time-trialing for best overall performances, it's not the best way to "spend" the energy!
But many people have been struck by the racing and wondered about its "validity". These numbers, to repeat what we said often during the Tour, don't prove no doping, but they do give cause for some hope, particularly because if you transposed the Vuelta into the Tour, it's quite a bit slower, overall. For many reasons, but again, it suggests that all is not necessarily doom for the sport.
Hopefully, we see more of that attacking riding in the Tour next year!