Although various treatment methods have been applied to low back pain, there is no general consensus on the most effective treatment. The aim of this study was to compare of three rehabilitation protocol: core training, core training plus electrotherapy and electrotherapy only on pain and performance in women patients with non-specific chronic low back pain. Fortyfive females with the mean and standard deviation of age (42.77 ± 6.51 years), weight (65.87± 7.94 kg) and height (159.02 ± 6.61 cm) with chronic low back pain were participated in the study. They were randomly divided into three groups: Core training (n = 15), Core training plus electrotherapy (n = 15) and electrotherapy only (n = 15). Before and after the intervention, visual analogue scale (VAS) and the oswestry disability index were used to assess pain intensity and disability, respectively. The Paired T-Test and one-way ANOVA test findings show that intensity pain variable was significantly decreased in three protocols (P<0.01), while no significant change was found in the disability variable in the electrotherapy protocol (P>0.05). When three groups compared, level of pain was no found to be statistically significant (P>0.05) but functional disability was found to be statistically significant (P<0.05). The findings of this study revealed that core stability training may decrease the pain intensity and disability.

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