Dear Ansam,
I found one article and will give you some search tips...
Work-Related Musculoskeletal Disorders in Physical Therapists: Prevalence, Severity, Risks, and Responses
search words such as:
work related injuries,
occupational injuries,
physical therapy,
physiotherapy,
risk factors
will help you to find more related articles.
I think that only after researching the problems (such as low back pain)and what is causing them can you think about how to prevent them.
Good luck with the search and your study.
kind regards
Esther