Practical tests for Physiotherapist Assistants at interview stage

Hello
Please could anybody out there give me advice on what sort of practical tests to expect at an interview for post as a Physiotherapist Assistant ? I want to be really prepared for this interview that I have coming up in two weeks and I have been told there will be a practical element to this interview. One site said they may ask me to lift a child in a car seat. Any advice would be greatly appreciated. Also one forum said that a good level of maths is required and I just wondered how good you have to be at maths for this job?
Kind Regards
Victanna120