Hi,
can I suggest you have a look at a typical curriculum? I'm sure there are some available online.
Sports Injury treatments are a part of Physio - that's the part everyone knows about. Other than back pain.
There are some major areas: Trauma/ Orthopaedics, Musculoskeletal, Neurology, Respiratory, Paediatrics, Care of the Elderly, Mental Health and Gynaecology (I hope I haven't forgotten any). Within these, again there are areas of specialities.
E.g.: Neurology: acquired medical, traumatic, spinal, degenerative; Gynae: surgery, obstetrics; Respiratory: medical, surgical, intensive care, chronic, rehab; Orthopaedics: trauma, elective, ....

The list is endless, but all will be covered within your studies.

Cheers, Fyzzio