I went along the same route that I normally go jogging, Belt Parkway Green Way, only of course the distance is longer. Instead of 4.5K out and back, for a total of 9K, I went 7K out, all the way to Owl's Head Pollution Control Center and the Bay Ridge Pier, and back. The total distance is 14K.
I don't get the same sense of accomplishment as when I go jogging. With jogging, I would sweat profusely, with the innermost layer of clothes soaked. I would actually feel warm from the heat I generated. It was a windless morning and I didn't feel a single drop of sweat formed. The inner T-shirt got somewhat wet on the back, but that was it. My legs did feel wobbly when I first stopped pedaling and resumed walking. They feel tired now, so I guess I did get some exercise out of the whole thing.