지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
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초록· 키워드
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In the present study, we aimed to elucidate how muscle strength and activity are affected by movement pattern(bilateral [BLM] & unilateral movement [ULM]) and movement velocity($0^{\circ}$/s, $60^{\circ}$/s, $120^{\circ}$/s) at maximum effort, and to elucidate the relationship between a left/right asymmetry and bilateral deficit. A total of 18 healthy males participated in the study. Each participant performed maximum knee extension bilaterally and unilaterally while the EMG and moment were recorded, and then the relationships between the asymmetry and bilateral deficit were analyzed. The peak moments for the isokinetic motion at $60^{\circ}$/s and $120^{\circ}$/s and overall muscle activities of lower extremity were significantly reduced for the BLM in comparison to the ULM. And though the asymmetry in ULM were maintained during BLM at all velocities, the bilateral deficits at the velocity of $0^{\circ}\acute{y}$/s and $120^{\circ}\acute{y}$/s were significantly correlated with increased asymmetries of muscle strength in ULM. In conclusion, the reduction in the muscle strength exhibited in bilateral knee extension was shown to arise partially from a reduction in muscle activity, and left/right asymmetry was found to be associated with mechanical reduction in bilateral movement. These findings suggest that training aimed at increasing muscle strength must involve methods and strategies intended to reduce left/right asymmetry.
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참고문헌 (28)
참고문헌 신청
Bobbert, M. F. / 2006 / Explanation of the bilateral deficit in human vertical squat jumping / Journal of Applied Physiology 100(2):493~499
Challis, J. H. / 1998 / An investigation of the influence of bi-lateral deficit on human jumping / Human Movement Science 17(3):307~325
Clerke, A. / 2001 / A Literature Review of the Effect of Handedness on Isometric Grip Strength Differences of the Left and Right Hands / The American Journal of Occupational Therapy 55(2):206~211
Cresswell, A. G. / 2002 / Muscle activation and torque development during maximal unilateral and bilateral isokinetic knee extensions / Journal of Sports Medicine and Physical Fitness 42(1):19~25
Cornwell, A. / 2012 / Relevance of hand dominance to the bilateral deficit phenomenon / European Journal of Applied Physiology 112(12):4163~4172
Challis, J. H. / 1998 / An investigation of the influence of bi-lateral deficit on human jumping / Human Movement Science 17(3):307~325
Clerke, A. / 2001 / A Literature Review of the Effect of Handedness on Isometric Grip Strength Differences of the Left and Right Hands / The American Journal of Occupational Therapy 55(2):206~211
Cresswell, A. G. / 2002 / Muscle activation and torque development during maximal unilateral and bilateral isokinetic knee extensions / Journal of Sports Medicine and Physical Fitness 42(1):19~25
Cornwell, A. / 2012 / Relevance of hand dominance to the bilateral deficit phenomenon / European Journal of Applied Physiology 112(12):4163~4172
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