I also shower at home. I dont think I have ever used my gyms bathroom facilities for any reason whatsoever.
For those that shower at the gym, do you shower barefoot? I dont think I could do that. I would be too freaked out about so many things.
I took swim lessons in my teens and my least favorite part was walking barefoot from the locker room down the hall to the pool. I was so grossed out by the feeling of walking on soggy water other peoples feet left on the floor. Plus that hall wasn't too clean feeling and it had little chunks of dirt you could feel walking on it, nasty.
lol, funny thing as to feet themselves pertaining women is I have a foot fetish. I said I was bi in another topic but I still only like feminine feet. Mind you, we are talking dozens of strangers of all ages, yes it was open to all ages, my most memorable moment was an old guy in like his 70s grunting and letting out a huge fart that echoed when I was changing in the locker room. And all sorts of levels of hygiene as far as taking care of/washing feet. My own dad had fungus so theres no telling as far as strangers go. I never used the shower either, I just did it when I got home right away and of course didn't use the same clothes.
I ended up having to stop because I developed an allergy to the chlorine eventually that I didn't have to start. In my late teens my body had a transformation where it became allergic to things I hadn't been to before reacting in hives on the skin such as peanuts and too much other food to name and a skin condition I have called eczema got worse. Yet I grew out of allergies to dog and cat hair which I am happy for since I love my cat who was a stray. So the body is an odd thing.
Edit: As far as in high school goes I managed to always have gym as my last period so I didn't have to go to class sweaty. I just took a shower when I got home, which I never stayed after and did anything after school, my anti social self.