Kiwicoach wrote:
Alan Couzens wrote:
It's impossible to see what is happening from an internal energy generation perspective solely by using an external power meter.
You know, for this exact reason, they do make this thing called a metabolic cart for that very purpose.
Very true, well bleeding obvious.
But the question is that these measures can be estimated enough to come to the same conclusions suggesting the various models proposed all, to some extent reflect the actual physiology.
Enough so, that you can take a Tony Martin type rider and assess that his high intensity power may be compromising his time trial power. But again, this is bleeding obvious.
That's the very point of this thread - going by the critical power model, your statement above isn't so "bleeding obvious."
In the critical power model, W' is independent of CP. It sits on top. There's absolutely nothing in the model that suggests that an increase in W' automatically results in a decrease in CP. Or, in Tony's case, there is nothing in the model that suggests that his high intensity power is 'hurting' his time trial power as these 2 factors are independent in the model. That's one of the reasons it's a crappy model. There are more.
As Sebastian has pointed out, in the real world, if aerobic power doesn't change and anaerobic power goes up, the result will be a *decreased* threshold, i.e., as you've pointed out in the Tony Martin example, a strong anaerobic power does 'hurt' an athlete's threshold power (all other factors being equal). Again, the CP/W' model doesn't reflect that in the same way that a VO2max/VLamax model does. In that model...
VLamax up + VO2max unchanged = drop in threshold
VLamax down + VO2max unchanged = rise in threshold
That's one of the reasons it's a better model.
Alan Couzens, M.Sc. (Sports Science)
Exercise Physiologist/Coach
Twitter: https://twitter.com/Alan_Couzens
Web: https://alancouzens.com
Last edited by:
Alan Couzens: May 14, 19 7:40