I have osteoarthritis in both knees and a bone spur in my left hip. It flares up often without notice. So when this happens, even an extended walk is difficult / painful for me. So I jump on my bike in order to keep my joints moving without extra weight stress on my joints, and I take Aiden along. Aiden loves being able to really go, something he can't do on our walks. I'm thinking, win-win - he gets better exercise and so do I, because he's moving faster and I'm going further, with no pain. But, as I'm riding past one of the neighbours sitting out on his front porch, he says, "Taking the lazy way out, I see."