@skyblond Have to say something about some winter day works (maybe less sweat / keeps body cooler).
Also maybe as "Wim Hof" mental type of effect you keep going more mentally in cold...
Interesting to hear though... I often like some target (I used to visit my friends "to see if they were in" else say hi to their parents and job back!
@freeschool The terrain here is fairly flat, so 20 or 35km is pretty okay for casual exercises. I generally ride bike in summer. The winter is too cold and I stay indoor so there are basically 6 months off. And I'm gradually working my body up. Usually, in the late July or August, I can handle 20km pretty easily and will challenge 35km.