Inclusion Criteria:  Patients from 20 to 55 years old Suffering from acute low back pain since less than 4 weeks Able to understand and speak French Whose family physician is included in the task-sharing and shifting model (only in the intervention group)  Exclusion Criteria:  Protected patient according to the public health regulation, Patient unable to fill the survey, Non-availability of the physiotherapist to receive the patient (only in the intervention group)