Objectives: To date, there are no reports comparing hamstring stretching & core stabilization in low back pain for parameters of Range of Motion, Disability & Pain. Moreover this is most ignored treatment aspect in Indian Physiotherapy clinics. Our study decide the fate of hamstring stretching & core stabilization in Chronic low back pain & helps to design a more efficient & refined treatment approach for future. Subjects: One hundered & Eighty patients (Males) ranging 20-40 years are equally divided in three groups are included in study. Group A subjects are treated with hot packs for 20 minutes followed by first grade core stabilization. Group B subjects are given 20 minutes hot packs followed by passive hamstring stretching & Group C subjects are given no treatment. Methods: Measurements are taken on day 1 and after 6 weeks of treatment/ control study. Outcomes are assessed on basis of Osweatry Disability Index (ODI) & Lumbar Range of Motion (ROM). Osweatry Disability Index (ODI) is measured as percentage of disability decided by questionnaire. Lumbar Range of Motion is measured using inch tape method. Results: Appropriate statistical test are applied using SPSS 12.0.1 software to signify the findings. All three groups’ shows improvement on each parameter studied yet their level of improvement varies much between experimental & control group. Group B i.e. Hamstring stretching group shows maximum improvement for outcome measures of Disability & Lumbar Range of Motion. On contrary Group C shows minimum improvement in all measured parameters. Conclusion: This study suggests that hot packs followed by hamstring stretching are most effective in improvement of Disability & Lumbar Range of Motion out of all studied treatment parameters. Thus Passive hamstring stretching should be used as a cardinal approach for an effective treatment of chronic low back pain.