No, da quanto ho capito io nei settaggi ci va la CP pena la sovrastima di W' e un W bal s-ball...ato [emoji16] !
Bisogna tenere presente che GC riflette il modello di Skiba, fondamentalmente. È stato "ibridizzato " con alcuni concetti di Coggan (le zone, la ftp, il tsb) da qui una possibile confusione.
Comunque hai la possibilità di testare la "tenuta" del tuo modello di atleta su GC, come suggeriva Townsend. Allego qui quello che lui considera il "Gold standard " della stima di CP "
A practical field method has been validated in a couple of studies (see links below). These use standard self-paced TTs instead of TTe tests over the same duration. There are some important points to consider though when conducting self-paced TTs.
1. Most important is that the TT is done as evenly paced as possible. Going out too hard could cause premature fatigue, whereas going out too easily might lead to some W' being left in the tank at the end (ie: you do not attain VO2max)
2. The key to estimating CP properly is that we want the shortest and longest duration which elicits VO2max. 2min might just not be long enough in all cases, so I would recommend 2.5 or 3min to be sure. Anything over 15min (if evenly paced) begins to approach the maximum duration that humans can sustain which elicits VO2max ie: a TTe test lasting >20-25min will not induce VO2max. Task failure occurs in combination with other reasons such as increased central fatigue, that are less present at shorter durations. So to be safe, I believe it is wise to cap the long end at around 15min. For this reason also it should be obvious that the 3/20min test has the potential to underestimate CP.
3. The durations should be evenly spaced. Thus duration of 3,8,14min would be preferable to 2,5,15min for example.
Validity and reliability of critical power field testing.
http://www.ncbi.nlm.nih.gov/pubmed/25260244
High agreement between laboratory and field estimates of critical power in cycling.
http://www.ncbi.nlm.nih.gov/pubmed/24022574