(a lot of advertising, flyers, banners or trials at public places/shopping complexes, etc.) I'm looking for different ideas.
I'd love to find out a bit more about your business - such as what population you'll be serving, where your office is located (i.e. in a building, a strip mall, inside of another practitioner's office), and what your specialty is.
I've owned and operated over a dozen physiotherapy offices and can tell you that there's no boilerplate answer to how to market.
That said - I'd suggest you get very clear about who you plan to serve and be as specific as you can. Once you know who your market is find out where they are and how they are looking for help.
If you message me with more specifics about your business and business model I'll be happy to get more specific with an answer.
Best of luck!