when you are walking on a treadmill do you have to wear shoes
Yes, it would be safe to wear shoes while on a treadmill. If you have bare feet then your feet turn black. You can where bare feet on a treadmill if you want.
Yes you should. Preferably some type of running or cross-trainer shoes. They will help support your legs and spine.
I went to the gym last week and didn't. people looked at me weird, but I forgot them. It doesn't matter
I believe is a good idea to wear one, nobody wants to smell your nasty feet or look at them.
You could hurt yourself if you go barefoot on a treadmill. Wear shoes.