Reading this. Finally. Its more about endurance. I guess I could see it useful for soldiers but as a pedestrian the limits of walking comes down to speed. I did a 3mile commute by walking and that is about the limit before I really need to use a bike as it just takes to long. Now biking is fast enough that if I get to sorta my time limit of getting somewhere, which for me is an hour, I could use the endurance or lack of fatigue I can get from an electric bike.