It really does make sense... if I'm bicycling and I'm tired, I might try pedaling hard for a while (standing up) and then coast for a while, a few times in a row. But generally i pedal most of the time at a similar speed.
I was accused of driving as if I am bicycling, a long time ago, and it's true now more than ever. That's a good thing
Of course, best to walk or bike in the first place...