Relationship between speed and power


I train with TR from 2017. I always used virtual power on my elite qubo fluid (with speed and cadence sensors).
One week ago I bought a power meter (giant power pro) to improve my trains.
When I did the 20’ FTP test (and other exercises) I noticed that to keep power stable, I must increase speed minute by minute.
Here the graphic:
image004 image002

I know that now is important power instead speed, but is a strange behaviour.
Has anyone noticed it?
I hope for a problem of warm fluid in my home trainer, because if the problem is power meter I waste my money. :tired_face:

Have a good rides!

Hi, this is common for fluid trainers.
As the fluid warms, the resistance changes.
My cycleops fluid2 have the opposite behaviour: the resistance goes up (a lot) after it is warmed up.
The resistance also keeps changing with efforts. On long intervals I can clearly see my speed/cadence going down because the resistance is going up. It’s a little annoying because sometimes I have to change gears in the middle of interval.


Thank you!
Now I’m relaxed. :nerd_face:

Hi, I also have a qubo fluid, Wich is the aprox. percentage of the increase of the speed to match the same power? Do you have the workout to analyse the data? Could you share it?