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학제간연구 과학기술학 뇌인지과학 기술정책 기타 복합학

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논문 기본 정보

자료유형
학술저널
저자정보
류지선 (한국체육대학교 생활체육대학 운동건강관리학과) 임가영 (한양대학교 보건대학원 직업 및 환경보건 전공)
저널정보
한국운동역학회 한국운동역학회지 한국운동역학회지 제25권 제3호
발행연도
2015.1
수록면
283 - 291 (9page)

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Objective : The purpose of this study was to determine the differences in the head and tibial acceleration signal magnitudes, and their powers and shock attenuations between flat-footed and normal-footed running. Methods : Ten flat-footed and ten normal-footed subjects ran barefoot on a treadmill with a force plate at 3.22m/s averaged from their preferred running speed using heel-toe running pattern while the head and tibial acceleration in the vertical axis data was collected. The accelerometers were sampled at 2000 Hz and voltage was set at 100 mv, respectively. The peak magnitudes of the head and tibial acceleration signals in time domain were calculated. The power spectral density(PSD) of each signal in the frequency domain was also calculated. In addition to that, shock attenuation was calculated by a transfer function of the head PSD relative to the tibia PSD. A one-way analysis of variance was used to determine the difference in time and frequency domain acceleration variables between the flat-footed and normal-footed groups running. Results : Peaks of the head and tibial acceleration signals were significantly greater during flat-footed group running than normal-footed group running(p<.05). PSDs of the tibial acceleration signal in the lower and higher frequency range were significantly greater during flat-footed running(p<.05), but PSDs of the head acceleration signal were not statistically different between the two groups. Flat-footed group running resulted in significantly greater shock attenuation for the higher frequency ranges compared with normal-footed group running(p<.05). Conclusion : The difference in impact shock magnitude and frequency content between flat-footed and normal-footed group during running suggested that the body had different ability to control impact shock from acceleration. It might be conjectured that flat-footed running was more vulnerable to potential injury than normal-footed running from an impact shock point of view.
#Acceleration Signal #Power Spectral Density #PSD) #Flat-footed Running #Shock Attenuation

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참고문헌 (50)

참고문헌 신청
Andreasen, J / 2013 / Exercise therapy and custom-made insoles are effective in patients with excessive pronation and chronic foot pain-A randomized controlled trial / The Foot 23(1):22~28 google schola Anees G / 2012 / Kinematic and kinetic analysis in adult subjects suffering from subble or flexible flat foot ersus normal / Bulletin of Faculty of Physical Therapy Cairo University 17(2):23~27 google schola Backmann, C. K / 1997 / The Effect of Treadmill Compliance and Foot Type on Electromyography of Selected lower Extremity Muscles during running google schola Bobbert, M. F / 1991 / Calculation of vertical ground reaction force estimates during from positional data / Journal of Biomechanics 24:1095~1105 google schola Boyer, K. A / 2007 / Changes in muscle activity in response to different impact force in human gait / Journal of Biomechanics 40:817~822 google schola

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