@nprofile1q... Not even ten years ago I would have stared at you wondering what sort of elite biker you are but now I do small trips for fun every day. 25 km is minimum during winter, summer is more like 35-50 km. With an old, heavy trecking bike. During vacation I do 150-200 km in slow pace starting around noon and going through the night until I get tired and take the train back home after about 15-24 hours. Ten years ago I had trouble walking two staircases in a row and had to rest the knees for a couple of days until I could walk again. Maybe it is true what parents and teachers said when I was young. Moving is important.