Freelancing physiotherapy/strength training

I'm wondering what credentials are needed to basically freelance physio/pilates/strength training services. Essentially offering a service where you go to peoples houses locally setting up a space in ones home or even through a gym somehow. With the service being provided being helping people with back/knee pain/tight muscles etc. Please forgive my ingnorance on the topic. I have a disability which makes 9-5 jobs very difficult and i'm looking to persue a part time flexible career.
Is there a route in that doesn't require a degree?

Many thanks.

Would still appreciate any sort of response to this.