I just want to give some praise to the program and coach and everyone part of it for all the effort.
I have a bike which I bought a few years ago, and the bike has a fairly big frame. It has always felt tirening to ride it because of the very forward leaning body position. Good for aerodynamics, but tirening on my back. I sort of regretted getting the big frame in retrospect.
I took the bike out for a ride the first time for this summer yesterday, and, wow! What a difference. I did not feel that tired back at all! It seems F1 has strengthened by core quite a lot and riding it was smooth like never before. I did not expect it, so it was a nice surprise.
The program is fun and addictive and very motivating (although sometimes there is also a sense of fear ahead of the challenge of a workout...). But not only that, it is also improving my quality of life.
I'm still training in the PE2-4 range. I cannot wait what it will feel like when I get up to higher levels.
So thanks! 