In the lumbar flexor muscle strength at 60°/sec, the standard deviation of the control group decreased from 170.12±44.75 Nm in the pre-test to 153.94±20.24 Nm in the post-test and the standard deviation of the experimental group improved from 167.44±45.25 Nm in the pre-test to 185.68±32.45 Nm in the post-test (Table 3).