Queste le "vecchie" faq di GC sulla CP vs FTP
Comunque utilizzando il nuovo pannello ed in particolare intervenendo sul modello e sui relativi parametri ( cambiando i secondi ) si modifica anche la CP del grafico ed in modo indiretto si intuisce quali siano i dati che impattano , alternativa c'è sul sito un po' di info in materia. Cmq Gc "cerca" gli intervalli migliori e da li si fa i suoi conteggi...che uno esca fisso in Z1 o Z6 da quel che trova estrarrà il meglio che c'è...tenendo conto che si può anche "periodizzare" la ricerca ed il conseguente calcolo.
3.2 What is the dierence between CP and FTP?
CP is a shorthand for CP60 in GoldenCheetah, and is computed using the Scherer/Monod
protocol using 3 and 20 minutes. Functional Threshold Power (FTP) is an actual measure
of the power an athlete sustains for 60 minutes.
Since it is very dicult for an athlete to maintain the desired intensity FTP 'reality' tends
to result in a number that is much lower than CP 'theory'. Often users will consider the
two as the same.
In GC we compute TSS and BikeScore using your 'CP' value. If you set it to your FTP
value TSS will be accurate, BikeScore is likely to be lower. And if you set it to your CP
value BikeScore will be accurate, but TSS will be overstated.
3.3 Why does my CP chart show higher watts for a longer
duration?
A higher power average for a longer
time is possible if an eort has been "book ended".
If, for example, you did a massive 30 second eort, followed by freewheeling for 29:30 then
another massive 30 second eort, then your best average for a continuous 30 minutes would
in fact be lower that your best average for a continuous 30minutes and 30 seconds. (Thanks
for Jon Hill from the Golden Cheetah Users mailing list for this example).
3.4 Can I set a dierent CP/FTP for dierent reasons e.g.
CP/FTP on a trainer?
We allow you to override the CP value for a specic ride by setting the "CP" eld to the
value you wish to use for the ride in question. We do not have a concept of 'separate' Cps
for dierent purposes { you will need to specify the CP when the data is imported into GC.
But this allows you to make manual adjustments.
We provide this functionality at user request { we do not endorse the concept of multiple
CP values. But we do recognise the ongoing debate regarding physiological stress from
working on a trainer vs on the road