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Objective. To explore the equivalence of an easier and more convenient lumbar multifidus (LM) muscle exercise pattern among standing back-extension, static standing, and superman training. Methods. A total of 26 healthy young volunteers were enrolled, including 14 males and 12 females, aged from 22 to 44 years with an average of  31.77 ± 7.06 years. Ultrasonography was used to measure the thickness of the left LM of the transverse process of the L5 vertebra during static standing, static prone decubitus, standing back-extension, and prone superman training. In this study, measurement data were expressed as  Mean ± SD and compared using the  t -test. Results. The left LM thickness of the L5 vertebra was  2.92 ± 0.46  cm during static standing and  2.78 ± 0.39  cm during static prone decubitus, showing no statistical difference between the two groups ( P &gt; 0.05 ). The left LM thickness of the L5 vertebra was  3.16 ± 0.51  cm during standing back-extension and  3.33 ± 0.41  cm during the prone superman training, indicating no statistical difference between the two groups ( P &gt; 0.05 ). Conclusions. There is no significant statistical difference in the LM thickness between static standing and static prone decubitus and between standing back-extension and prone superman training, indicating the equivalence of the two methods in LM exercise, providing a simpler and easier way for clinical exercise of lumbodorsal muscles.

A Preliminary Study on the Equivalence between Standing Back-Extension and Superman Training in Lumbar Multifidus Exercise