first question; how accurate is eFTP calculation compared indoor and outdoor? A mate of mine does >90% indoor and his eFTP matches his latest FTP test (on Zwift) near to 100%.
I am doing 100% outdoor, including commutes. Didn’t have the opportunity to do a test the last few weeks (tbh. didn’t have the motivation :P). My eFTP is 219 atm, and the fitness curve shows me I am deep in the red zone all the time. FTP is set to 220 since 6 weeks or more. I don’t feel like overtrained or exhausted.
Am I right that setting a higher FTP would create less load and so less stress?
Is there a way to kind of simulate the fitness diagramm with a higher FTP? I am a bit afraid of recalculating the last 42 days
The eFTP calculation should work just as well indoors or outdoors. Some people can produce more power outdoors so you might get a higher number that way.
From the chart it looks like you are coming off a very low fitness base and have ramped up very quickly and hence are in the red. However it is quite likely that you actually started a lot fitter than the chart suggests. So I wouldn’t worry about all the initial red zone.
Setting a higher FTP will create less load. You can easily test that just by filling in a higher number on the activity list view. It’s easy to undo it.
But its probably a good idea to just go out do a max effort to get a new eFTP number.
Thanks, David. You are absolutelty right. I started cycling just 8 months ago. The powermeter was installed just end of January. I was not really unfit before, but I increased fitness stress a lot since then.
Your last sentence is probably a good conclusion
Stay safe and thanks again.
What kind of bike are you riding?
I’m asking because
From the FTP/kg, you’re not overweight
You’re putting out about 200W
Your avg speed looks low to me for that kind of power.
Might have to do with the amount of climbing, but still…
CP from Golden Cheetah is probably a bit high because I would expect a higher W’ value at that fitness level.
eFTP from intervals is probably a bit low, caused by the absence of a maximal effort.
It’s time to put out a max effort and get the numbers right.
the bike is a 8kg gravel bike. Weight is 72kg. Low speed probably because those actvities contain much climbing, much communting and only very little hard runs. I’d also say that GC is too high. I’d give myself about 240 atm
That’s the point. Let’s see what the weather says tomorrow…
Test done I started a little bit too easy and after 19:30 I was on top of the hill The file says 245W 20min - eFTP 234W. It did not feel like real 100%. Right after I did another 5min flat out on the next hill with 300W.
One more question: I think I am beginning to understand the impact of changing the numbers in fitness days… As I just started recording do you think it makes sence to increase fitness days (i.e. to 28)? Don’t get me wrong, I don’t want to “tune” the graph, I would just like to set it up closer to what is currently “right”…
The best way to handle this would be to have a “Starting Fitness” number. You could the port your Fitness from another platform. Tht’s how Sporttracks does it.
As @david says, don’t change the days unless you know what you’re doing. Since fitness is a 42 day weighted rolling avg, the chart reflects your situation very well with 6-8 weeks of data.
I started a little bit too easy and after 19:30 I was on top of the hill 
The file says 245W 20min - eFTP 234W. It did not feel like real 100%. Right after I did another 5min flat out on the next hill with 300W.