Welcome to Gaia! ::

I've never heard of them, but they sound really interesting! How are they different from regular walking/running shoes?

I wouldn't say that it encourages you to walk "properly" since they do change your body's biomechanics while walking.

I haven't looked too much into, but my personal theory is that the rounded shape causes you to step down with your toes higher in the air and forces your calves to work harder to pull down the toes and overcome that roundish shape. I assume that there's also something about them which creates slightly less stability and thus causes supporting muscles in your thighs, butt, and abs to work harder to keep you upright.