Not swinging your arms when you walk increases the effort of walking by 12%, the equivalent of walking 20% faster or carrying a 10 kg backpack.
In Australia, it is illegal to walk on the right-hand side of a footpath.
There are times when you're walking that the pressure on your feet exceeds your body weight, and when you're running, it can be three or four times your weight.
When you take a step, you are using up to 200 muscles.
In a lifetime, an average person walks the equivalent of 5 equators