Background: Sacroiliac joint dysfunction is a widespread cause of lower back pain and thought to result from acquired mechanical instability resulting in stable subluxation with no history of serious injury.

Objectives: To see the impact of muscle energy technique with and without sacroiliac belt on pain, muscle strength and quality of life in sacro-iliac joint dysfunction

Materials and Methods: This was a randomized clinical trial with sample size of 48 through convenient sampling technique in Begum Akhtar Rukhsana Memorial welfare trust Hospital, Lahore. Duration of the study was 9 months. Participants were allocated into experimental and control groups. Group A received MET with SI Belt and Group B received only MET. SF-36, NPRS and MMT used for Quality of life, Pain and MMT for Muscle strength. SPSS version 24 was used to analyze the results.

Results: Mean age of subject in group A and B was 39.38±6.114 and 40.83±6.246. Within group analysis of pre and post intervention values of group A & B showed a p-value <0.05 for NPRS and MMT. But no significant improvement was seen in SF-36 questionnaire with p value >0.05. Independent samples test for between group analyses showed the p value of greater than 0.05.

Conclusion: A significant improvement was seen in pain and muscle strength after the treatment in both groups but no significant improvement was found in quality of life. Between-group analyses indicated no significant differences between groups A and B.

Keywords: Muscle energy technique, MMT, Numeric pain rating scale, Sacroiliac joint dysfunction