Have you heard of Earth shoes? I never had but I saw an advertisement for them and I wanted to know more. They claim to "burn more calories with every step." And they are cute looking. So I went onto their website and they've been around since the 70s and all of their shoes feature a "negative heel." The negative heel allows your body to align itself at its most optimal position creating better posture, toning of the legs and lenthening of muscle fibers. They are supposed to help with breathing and everything - they were designed by a yoga master. There are numerous customer testimonials backing up their claims and I am very intrigued by the possibility of these "healthy" shoes. Wouldn't they be a great purchase for people who are on their feet all day? Like servers or nurses? If I was still waiting tables I would rush to get the sneakers. I think I'll rush to get the "Inhale" style just to test them out in everyday life. I prefer to walk places (instead of driving) so these could really be helpful!