Korean Journal of Applied Biomechanics (한국운동역학회지)

Korean Society of Applied Biomechanics (한국운동역학회)
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The Effect on Muscle Activation in the Trunk and Lower Limbs While Squatting with Slope-whole-body Vibration

스쿼트 동작 시 경사기능전신진동기의 적용이 몸통 및 하지 근 활성도에 미치는 영향

  • Oh, Ju-Hwan (Department of Healthcare Engineering, Graduate School of Chonbuk National University) ;
  • Kang, Seung-Rok (Division of Biomedical Engineering, Collage of Engineering, Chonbuk National University) ;
  • Kwon, Tae-Kyu (Division of Biomedical Engineering, Collage of Engineering, Chonbuk National University) ;
  • Min, Jin-Young (Sonicworld Corporation)
  • 오주환 (전북대학교 대학원 헬스케어공학과) ;
  • 강승록 (전북대학교 공과대학 바이오메디컬공학부) ;
  • 권대규 (전북대학교 공과대학 바이오메디컬공학부) ;
  • 민진영 ((주)소닉월드)
  • Received : 2015.11.02
  • Accepted : 2015.12.16
  • Published : 2015.12.31
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Abstract

Objective : The purpose of this study was to investigate the effects of dynamic squats with slope-whole body vibration (WBV) on the trunk and lower limb in muscle activities. Method : 9 healthy women (age: $21.1{\pm}0.6years$, height: $160.5{\pm}1.4cm$, body weight: $50.5{\pm}2.4kg$) were recruited for this study. Muscle activities in the trunk and lower limb muscles, including biceps femoris (BF), rectus femoris (RF), rectus abdominum (RA), gastrocnemius (GCM), iliocostalis lumborum (IL) and tibialis anterior (TA), were recorded using an EMG measurement system. The test was performed by conducting dynamic squats with slope-WBV using frequency (10Hz, 50Hz), amplitude (0.5mm), and degree ($0^{\circ}$, $5^{\circ}$). Experimental method consisted of 2-pre-sessions and 1-test-session for 20 seconds. Results : The results showed that the muscle activities of the trunk and low limb muscles increased significantly with the $5^{\circ}$ slope and lower frequency (10Hz) except for in the TA. From this result, we confirmed that the slope and WBV could efficiently affect stimulation, enhancing muscle activities by facilitating neural control trail and muscle chain tightness. Conclusion : Utilizing the slope-WBV device while squatting could give positive effects on muscle activation in the trunk and lower limb muscles and provide neural stimulation, enhancing muscle chain of control subsystem through TVR (tonic vibration reflex).

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References

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