title: Effect of vibration on muscle strength imbalance in lower extremity using multi-control whole body vibration platform.
abstract: This study shows the improvement of muscle activity and muscle strength imbalance in the lower extremities through independent exercise loads in vibration platform. Twenty females of age 20 participated in this study. The subjects were divided into WBV group, with more than 10% of muscle strength imbalance between left and right the lower extremities, and control group, with less than 10% of muscle strength imbalance between left and right the lower extremities. As the prior experiment showed, different exercise postures provide different muscular activities. As a result, the highest muscular activity was found to be in the low squat posture. Therefore, the LS posture was selected for the exercise in this experiment. Vibration intensities were applied to dominant muscle and non-dominant muscle, and the vibration frequency was fixed at 25Hz for the WBV group. The control group was asked to perform the same exercise as the WBV group, without stimulated vibration. This exercise was conducted for a total of 4 weeks. As a result, the WBV group which showed an average deviation of 16% before the experiment, tended to decrease approximately to 5%. In this study, vibration exercise using load deviation is shown to be effective in improving the muscle strength imbalance.
authors.affiliation: Division of Biomedical Engineering, Chonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si, Jeonbuk 561-756, Republic of Korea.
authors.forename: Chang Ho
authors.initials: CH
authors.lastname: Yu
authors.affiliation: Department of Healthcare Engineering, Chonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si, Jeonbuk 561-756, Republic of Korea.
authors.forename: Shin Bae
authors.initials: SB
authors.lastname: Seo
authors.affiliation: Department of Healthcare Engineering, Chonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si, Jeonbuk 561-756, Republic of Korea.
authors.forename: Seung Rok
authors.initials: SR
authors.lastname: Kang
authors.affiliation: Chonbuk National University Automobile-parts & mold Technology Innovation Center, 67 Yusang-ro, Deokjin-gu, Jeonju-si, Jeonbuk 561-844, Republic of Korea.
authors.forename: Kyung
authors.initials: K
authors.lastname: Kim
authors.affiliation: Division of Biomedical Engineering, Chonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si, Jeonbuk 561-756, Republic of Korea.
authors.forename: Tae Kyu
authors.initials: TK
authors.lastname: Kwon
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D005260:Female; D006801:Humans; D007866:Leg / Q000502:physiology; D053580:Muscle Strength / Q000502:physiology*; D010812:Physical Stimulation / Q000295:instrumentation / Q000379:methods*; D004856:Postural Balance / Q000502:physiology*; D011187:Posture / Q000502:physiology*; D011597:Psychomotor Performance / Q000502:physiology*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D014732:Vibration / Q000627:therapeutic use*; D055815:Young Adult
keywords: Whole body vibration; load deviation; muscle strength imbalance; surface EMG