Kickbiking, jogging, and cycling share a lot of the same leg movements and dynamics, yet my experience with kickbiking is so much more pleasureable and less stressful. Why?
If we make a very simple "matchstick" model of the lower leg and foot - strip away the skin and most of the muscles - perhaps we can get a feel for what's going on. To make things even simplier to visualize and understand, it's helpful to model the foot itself as just two elements. Of course in real life the foot is a very complex and difficult to model mechanism, but for now we just want to see the macro dynamics of the leg and foot.
Adding some animation provides a model we can use to see what takes place when we jog or kick:
This has a lot of side benefits. In my own case, for example, there are times when a sore foot or some other minor injury would normally rule out jogging, but by taking it easy with the kickbike, I am able to continue with an active exercise program.
Does that mean that I've given up cycling? No - no way! I love cycling and will continue to enjoy it as long as I possibily can. It's great for longer trips - like when I want to go a significant distance, or for a few days in a row, or if I need to get someplace in a hurry. It's also great for those trips to the 7/11 when I know I'm going to come back with a few more bags than I can handle on my Kickbike.
Is kickbiking perfect - does it solve all problems? No - of course not. It has its drawbacks and shortcomings just like anything. For example, last night, while running one of our dogs with my Kickbike, I managed to find out why you shouldn't try to scratch your nose while kicking...
Still, it's the first exercise methodology that I've experienced where I can do it for hours, feel the strong training effect in my muscles, feel no pain or soreness, and immediately want to go back and do more of it. It fits the ecology of my body, and my spirit, like a glove.
And... it's just so much darn fun!