Original Article

The effects of isometric exercise types on pain and muscle activity in patients with low back pain


Hyun-Seung Rhyu, Hun-Kyung Park, Jung-Sub Park, Hye-Sang Park

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The purpose of the present study is to evaluate the effects of isometric exercise types on low back pain (LBP) patients. Isometric exercise types were mat exercise and I-Zer exercise. Subjects were divided into 3 groups: LBP control group, LBP mat exercise group, and LBP I-Zer ex-ercise group in 23-25 aged men. Visual analogue scale (VAS) and elec-tromyography (EMG) were used to evaluate the degree of pain and the muscle activity in LBP patients. Root mean square (RMS), median fre-quency (MDF), and mean frequency (MNF) were checked by EMG pow-er spectrum analysis on longissimus thoracic (LT), iliocostalis lumborum (IL), mulitifidus (M), and rectus abdominis (RA). LBP mat exercise pro-gram and LBP I-Zer exercise program were conducted 5 sets once time, 3 times per week during 6 weeks. The two-way ANOVA with repeated measure was used to check the pain degree and muscle activity. The present results showed that muscle activity in the LBP I-Zer exercise group was increased compared to the LBP mat exercise group and LBP control group (P<0.05). LBP I-Zer exercise group and LBP mat exercise group showed increased mean frequency in LT, IL, M, and RA muscles than the LBP control group. Therefore, LBP patients performed isomet-ric exercise may have positive effect to reduce pain degree and to in-crease muscle activity. Especially, LBP I-Zer exercise type showed more effectiveness in reducing pain degree and enhancing muscle activity.


  Experimental procedures
  Statistical analyses
  Changes in pain scale
  Changes in the muscle activity


  • Hyun-Seung Rhyu Department of Sports Health Medicine, College of Health Science, Jungwon University, Geosan-gun, Chungcheongbuk-do, Korea
  • Hun-Kyung Park Department of Physiology, Kyung Hee University College of Medicine, Seoul, Korea
  • Jung-Sub Park Department of Physical Education, Korea Air Force Academy, Cheongju, Korea
  • Hye-Sang Park Department of Sports Health Management, College of Physical Education, University of Suwon, Hwaseong, Korea


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