Good answers. Karin’s advice to investigate your exposure if you someday find yourself functioning as a personal trainer but actually “working” as a physical therapist is definitely sound advice. I do think that your years of experience as a personal trainer will prove invaluable in your practice of physical therapy.
From what I understand, a physiotherapist is what is called a physical therapist in the United States. That generally entails more formal education. Here in the US, the push is to have all physical therapist attain a doctorate degree.
I have considered returning to college for the doctorate, but it hasn’t been necessary yet. I still can do all the things that I want under my cert and specialties. And as much as I love to learn, after having done eight years of college, the cost doesn’t balance well with my needs.