Evaluation of the effect of biofeedback on pain relief and function in patients with patellofemoral syndrome

Suggest a more effective treatment method to strengthen muscles, improve function and reduce pain in patients with patellofemoral syndrome

Randomized, Double-blind, clinical trial with two parallel groups (control and intervention)

Informed consent will be obtained from patients before entering the study. Demographic information of all patients including age, sex, BMI, duration of illness was first collected and goniometer tests, VAS, KUJALA and SF36 questionnaires and quadriceps muscle range of motion and thigh diameter before rehabilitation were assessed by the Physical Medicine and Rehabilitation resident. After 3 months, the rehabilitation program will re-evaluate all the tests and the level of satisfaction.

No evidence of other injuries inside or outside the knee joint Normal range of notion of knee No history of knee trauma, intra-articular injection or surgery Do not use non-steroidal anti-inflammatory drugs for 15 days before starting treatment Full collaboration to conduct the study

Strengthen knee stabilizer muscles including quadriceps, gastrocnemius and soleus, hamstrings, knee abductors and adductors Routine isometric exercises of each muscle, in the form of quadratic isometric contraction in full extension, hamstring at 90 degrees, plantar flexors in neutral position and adductors and abductors in sitting position via biofeedback For 4 weeks three times a week with 30-minute sessions with occupational therapist supervision and sham biofeedback for the control group.

Pain intensity; Quality of Life; Satisfaction rate; Daily performance

In this study, block randomization method will be used to maintain the balance between the intervention and control groups. In each block, 6 people will be in the study group as 3 people and 3 people in the control group. How to assign people in each group will be done using a table of random numbers read from top to bottom

According to the patients are in two groups, A and B; group A are patients who after connecting the biofeedback device are taught how to perform exercises and how the device works by changing shapes and playing games. Group B are patients who, after connecting the biofeedback device are taught only how to do exercise and do not see how the device works, and only a game is being played in front of them that they do not know is related to exercise and muscle contraction. The device is connected to patients by a trained occupational therapist who is aware of how patients are coded according to the randomization formula. Another occupational therapist performs an initial evaluation of the table of variables in patients before and after biofeedback, knowing only the names of the patients and the patient's belonging to group (A or B). Therefore, the study is the double blind.

Patient privacy

All data can be shared after patient are not going to be identified

6 months after the end of the study

Researchers working in academic and scientific institutions

For use in related studies

Corresponding Author

By email