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 and 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.