I mentioned to a friend that on a particular route I was slow climbing the hills.
I said that although I was doing 20 km/hr on the flat, I was riding only 5 to 8 km/hr up the steep hills.
He said, "It doesn't matter how slow you go up a hill because you can always make up for it on the downhill so that it will even-out your speed."
While his "theory" sounds plausible, it seems to me that in practice it doesn't hold up.
Can you comment?