Objective: To compare the effects of isometric (stability) and isotonic training on core muscle in patients with non-specific low back pain on pain, endurance, and functional disability.Methods: Forty participants of both genders aged between 20 and 35 years suffering from non-specific low back pain were taken and equally divided into two groups: Group A isometric exercise and Group B isotonic exercise, both the group received baseline treatment of transcutaneous electrical nerve stimulation

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... hot moist pack. Outcomes measure visual analog scale, endurance test, and modified Oswestry disability index were used the pre-treatment and at the end of 4 weeks.Results: Experiment of both the groups showed a non-significant improvement in pain, endurance, and functional disability. Except for extensor endurance test which shows significant different in Group A.Conclusion: Both isometric and isotonic exercises are equally effective in reducing pain, increase endurance, and improve functional disability in patients with non-specific low back pain.