Introduction: Low back pain is an extremely common problem that most people experience at some point in their life Low back pain is well documented to be an extremely common health problem however, its burden is often considered trivial.The common form of low backache is mechanical type and 80­90% patients will complain of dull, achy, diffuse pain and stiffness that is confined to the low back area or may radiate to buttock nd hip which results from reflex muscle spasm from primary pain, where there may have trigger points within their muscles [1]. Quadratus lumborum muscle is an important stabilizer of the lumbar spine [2]. The quadratus lumborum, or QL, is a common source of lower back pain [3].

Purpose of the Study: To find out the effect of stretching on quadratus lumborum muscle in non specific low back pain.

Methods: Group A: Group A (15 patients) received core stability warm up and spinal extension exercise. Group B: Group B (15 patients) received the same treatment line with addition of Quadratus Lumborum stretch.

Conclusion: The study concludes to that there is significant difference on between Group A and GroupB on the basis of Oswestry Low Back Pain Disability Questionnaire. Though there is no significant difference between Group A and Group B on the basis of VAS.

Discussion: The study was an experimental study which aim to find out the effect of stretching on shortened quadratus lumborum muscle in non­specific low back pain the study designed comprised of 30 subject and they were equally divided into 2 group group A consist of 15 subjects and group B consist 15 subjects the showed an significant result on comparing between the group A and group B the result was significant.

Limitations of Study: The sample size was small consisting of 30 subjects. Other muscle components which have a significant role in causing non­specific low back pain were not taken into consideration. Marginal tightness in muscle such as Iliopsaos, Hamstring and Tensor fascia Latae was not considered. Body mass index was not controllable.

Future Scope of Study: Larger sample size can be taken. Study can be conducted for longer duration. Different age groups can be taken.

Keywords: Stability Warm Upexercise; Spinal Extension Exercise; Quadratus Lumborum Stretching; Oswestry Low Back Pain Disability Questionnaire and VAS.