Winterfold said:Do you understand 'threshold', 'limit' and 'average'?
I think you almost certainly do, but it doesn't help your argument, so you hope noone else notices? Or more likely, cares?
Just in case you don't I imagine Froome's last km was > 5.9W/kg, but then he would have been riding at his limit - probably more like 7/8/9 W/kg for a few minutes burst, and was probably just under threshold for the rest of the climb as he was being drafted by Uran and Henao (who would have been at their threshold) so over the whole climb he averages threshold.
Complex stuff huh - threshold, 5 minute power, drafting, basic mathematics - it's easier just to post drivel.
BYOP88 said:This forum really needs a 'Thank you/Like' post option.
Drivel? Observe the facts:
1. the climb was 38:22. "Threshold" as in FTP functional threshold power is the power you can hold for an hour. It's irrelevant.
2. Froome's attack was for 2 minutes. So 5 minute power, again, irrelevant.
None of these climbs are an hour long, so this "limit" we're talking about, is some magical fairy dust W/kg that has been "allowed", for the final, MTF of a stage in a multi-stage race. It's meant to indicate "human" performance.
Back to the post you denigrated with your genius rebuttal. Froome rode for 36 minutes just under threshold and then did a supra-VO2max++ effort to top it all off.
My point: if Froome was really at his limit, he could not attack
Your rebuttal: he was just under his limit, of course he could attack, he was drafting n stuff
Yes of course, you have explained it all away, nothing to see.
Looking at this video: https://www.youtube.com/watch?v=AA-R37jUwWY - Froome takes off / drops his team mate at 5:00 into the video and crosses the line at 7:06 into the video.
To keep the calculations simple, let's say it's 2 minutes at his 2 minute limit and 36 minutes at "sub-threshold".
The simple maths you disparagingly allude to is the following equation:
((36/38:22)*X) + ((2/38:22)*Y) = 5.93
where
X = average power before his attack
Y =average power of his 2 minute attack
We're solving for 2 variables with one equation, but we can do that using limits.
Froome is riding by himself for the final 2 minutes (Y), so we know the minimum for his attack must be 5.93W/kg, given he's riding solo, dropping everyone, and the final average.
According to acoggan's power profile table, world record 1 minute power is 11.5 W/kg. As this is a 2 minute effort, I think we can safely say that's the upper bound on Y.
Y = {5.93 - 11.5}
And we know the maximum for X before his attack is 5.93W/kg, again, as he clearly is going harder in his attack and we cannot go over that average. We can use the upper limit for Y to determine our minimum X, but it's just as easy to start at 5 and work our way up.
X = {5 - 5.93}
So basically what you're saying is, Froome can ride at 96-98% of what is humanly possible up the final climb in a protour race, and then accelerate and sustain supra-VO2max power for 2 minutes. And you have no problem with this?
What I am saying is: he must have been cruising, at 96-98% of what is considered humanly possible, to have that much anaerobic work capacity left to be able to smash out the 2 minute power he did. He was riding at effectively 1/3 - 2/3 more W/kg for the final 2 minutes.