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KMID : 1206220200270010051
Journal of Korean Academy of Physical Therapy Science
2020 Volume.27 No. 1 p.51 ~ p.55
Effects of various plank exercises on activation of hamstring muscle
Park Yoon-A

Kim Eun-Jin
Cha Ha-Yeon
Ryu Hee-Won
Seo Young-Hoon
Seong Ji-Yeon
Hwang Jeong-Im
Choi Bo-Ram
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.
KEYWORD
Balance pad, Core muscles, Hamstring, Plank exercise, Sling
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