"Training is testing and testing is training." Now an all-out 60 min effort would be a good way of estimating FTP.although I have have always preferred a 40 km (really, ~40 km, since many courses, at least here in the US, aren't measured all that accurately) TT. Unfortunately, you have numerous people out there confusing people by insisting that is the definition. I have never believed that an all-out 60 min effort is the gold standard for determining FTP.
Therefore I'm not sure the CP value as calculated by Golden Cheetah is as useful for TTing (unless very hilly).
Useful in a road race where the best strategy is to vary power effort to follow attacks or rest in the bunch. The real aim of defining CP is to model your ability to put out efforts above CP and recover below CP. If you are doing your own training plan then you can use whichever value you wish. If you are implementing other peoples training plans and are trying to get the intensity right, then use the same measure of intensity that they use (usually % of FTP/CP60). Athletes will know their FTP and when they see GC calculating a number which is within ~10% they assume it is trying (and failing) to calculate FTP (CP60, MAP60, MMP60). There is a relatively small drop off in power from 20 minutes to an hour (most people assume 5% drop when calculating their FTP from a MMP20). The second reason they are confused is that the numbers are often quite similar (~10%). Critical Power as calculated by Golden Cheetah is NOT CP60, and anecdotal sits in the 20-30 minute range (but varies from athlete to athlete depending on how you are effected fatigue). Firstly, that FTP is defined as MMP60, and sometimes people interchange MMP for Maximal Average Power (MAP) or Critical Power (CP), followed by the time unit, to define maximum outputs for given durations. I think the confusion comes from two factors. As peoples power curves generally flatten out before FTP in the 20-30 minute range (but this can very). The model tries to define a number (CP) where your power curve flattens out.
Coggan zones, using CP will have you struggling.Ĭritical Power is a model output taken from fitting curves you your longest effort for given powers. If done correctly CP as calculated by GC will be slightly above FTP or the power you can hold for 60 minutes (Mean Maximal Power 60). The two should not be used interchangeably for training purposes. I know this is an old thread, but just updating as it came top of my search result looking at training with golden cheetah CP.Ĭritical Power (CP) as calculated by GC is not equivalent to Functional Threshold Power (FTP).
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