This study was designed to compare the efficacy of trunk stabilization exercises using a gym ball and conventional back care exercises for patient with chronic LBP. The results of this study demonstrated that trunk stabilization exercises bring greater gains in all the outcomes including, endurance, VAS score, and MODQ score. Analysis of the results indicates greater improvement in the abdominal muscle endurance at week two, four, and six in the trunk stabilization exercises group compared to the conventional back care exercises group. However, greater reduction of pain intensity and functional disability was seen only at week six in the trunk stabilization exercises group compared to the conventional back care exercises group.