ABSTRACT
BACKGROUND: Low back pain (LBP) is a high impact condition that affects the working population, generating social and economic repercussions, the most relevant symptoms being pain and functional disability. Conservative treatment is often based on stabilizing spinal muscles with exercises: the Russian current (RC) is reported as an alternative, because it promotes muscle contraction, providing muscle strengthening and hypertrophy. OBJECTIVE: To assess the effectiveness of the RC in aiding the treatment of low back pain. METHODS: This randomized study included 23 women aged 18-30 years, divided into two groups: the control group (CG) and the Russian current group (RCG), for four weeks. Pain (visual analogue scale, VAS; pressure algometer, PA), function (Oswestry Low Back Disability Index), resistance (trunk resistance [TR] test) and thickness changes in the muscle (ultrasound image) were evaluated before and after the RC protocol and at one-month follow-up. RESULTS: There were significant VAS reductions in both groups, but at follow-up these had only been maintained in the RCG, which presented lower values than the CG in the second evaluation. For PA, Oswestry and TR, there were differences only in the RCG. In a comparison of LBP between the groups, the initial difference disappeared in subsequent evaluations; TR presented higher values in evaluation 2 and 3 in the RCG group. In terms of thickness changes, differences between the groups were reduced after treatment. CONCLUSION: The proposed treatment was effective in the reduction of LBP, with short-term improvement in resistance and thickness changes of the multifidus.