Interesting! So you were in the blue/grey zone for most of your training.
Thanks for all the replies!
My FTP is going up and I am getting faster, so i think this is working for me. However, this made me wonder whether I could further maximize my training and progress by adding more load/intensity to push me into the green zone, without burning out? If so, what kind of sessions would be beneficial? Or is that a recipe for disaster?
Regarding what I was doing before: not much… I started cycling about 4 months ago, so I guess anything I do at this point would have a positive effect on my fitness level :-).