The duration of physical therapy treatment varies depending on the nature and severity of the condition being treated. A systematic review of randomized controlled trials found that the average number of physical therapy sessions for musculoskeletal conditions ranged from 6 to 16 sessions, and the duration of treatment ranged from 2 to 12 weeks. However, individual factors such as age, comorbidities, and adherence to the treatment plan can also affect the duration of physical therapy needed.