Journal of The Korean Society of Physical Medicine

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Table. 3.

Table. 3.

Change of Lower Back Muscle Impedance (n = 40)

Group Pre Post Post - Pre SMD (95% CI††) t (p)
sEMG_Lt (mV) PSG (n = 20) 22.36 ± 13.31 14.54 ± 14.01 -7.82 ± 12.7 .572 (-.06, 1.204) 2.754 (.013* *)
ASG (n = 20) 22.92 ± 10.37 21.03 ± 9.44 -1.89 ± 3.52 .191 (-.431,.811) 2.403 (.027*)
t (p) -.148 (.883) -1.716 (.094) -2.011 (.057)
time F (p) 3.307 (.073)
time*group F (p) 1.232 (.271)
Rt PSG 22.88 ± 7.59 20.61 ± 10.78 -2.27 ± 8.29 .243 (-.378, .865) 1.225 (.236)
ASG 23.46 ± 6.16 21.95 ± 7.03 -1.6 ± 4.19 .228 (-.393, .85) 1.608 (.124)
t (p) -.267 (.791) -.468 (.643) -.367 (.715)
time F (p) 1.093 (.299)
time*group F (p) .045 (.833)

* p < .05, **p < .01.

surface electromyography_left, passive stretching group, active stretching group, ∥standardized mean difference, ††confidence interval

J Korean Soc Phys Med 2021;16:49-61 https://doi.org/10.13066/kspm.2021.16.1.49
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