Journal of Korean Physical Therapy Science (대한물리치료과학회지)

Korean Physical Therapy Science (대한물리치료과학회)
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Effects of various plank exercises on activation of hamstring muscle

  • Park, Yoon-A (Dept. of Physical Therapy, College of Health and Welfare, Silla University) ;
  • Kim, Eun-jin (Dept. of Physical Therapy, College of Health and Welfare, Silla University) ;
  • Cha, Ha-yeon (Dept. of Physical Therapy, College of Health and Welfare, Silla University) ;
  • Ryu, Hee-won (Dept. of Physical Therapy, College of Health and Welfare, Silla University) ;
  • Seo, Young-hoon (Dept. of Physical Therapy, College of Health and Welfare, Silla University) ;
  • Seong, Ji-yeon (Dept. of Physical Therapy, College of Health and Welfare, Silla University) ;
  • Hwang, Jeong-im (Dept. of Physical Therapy, College of Health and Welfare, Silla University) ;
  • Choi, Bo-ram (Dept. of Physical Therapy, College of Health and Welfare, Silla University)
  • Received : 2020.04.06
  • Accepted : 2020.05.21
  • Published : 2020.06.30
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Abstract

Background: A typical plank exercise (PE) strengthens the core muscles, stabilizes the spinal column, and provides stability around the pelvis and trunk when the trunk is aligned. However, because PE require that the hip joint be kept straight, they can activate the hamstring (HAM). Excessive HAM activation can induce tightness, which may cause low back pain. Therefore, it is necessary to explore PE methods that can minimize HAM activity while maximizing core muscle activity. Design: Cross-sectional study. Methods: This study included 30 healthy adults as subjects. We measured the activity of the HAM and the erector spinae (ES), rectus abdominis (RA), and external oblique (EO) muscles using surface electromyography during three PEs (typical PE, PE with balance pad, and PE with sling). Results: The RA, EO, and ES showed the highest muscular activity during PE with balance pad and the lowest during PE with sling; however, the differences were not significant. The HAM showed lower activity during PE with sling than during the other two PEs; however, these differences were also not significant. Conclusion: Although HAM activation was not significantly difference among PE positions, we should recognize altering activation of core and hamstring muscle according to PE postures.

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