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논문 기본 정보

자료유형
학술저널
저자정보
Ryu, Ji-Seon (Department of Health and Exercise Science, College of Lifetime Sport of Korea National Sport University) Yoon, Suk-Hoon (Department of Community Sports, College of Lifetime Sport of Korea National Sport University) Park, Sang-Kyoon (Department of Physical Education, College of Sport Science of Korea National Sport University)
저널정보
한국운동역학회 한국운동역학회지 한국운동역학회지 제26권 제2호
발행연도
2016.1
수록면
167 - 174 (8page)

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Objective: The purpose of this study was to determine the interrelationship between ranges of motion of the knee and ankle joints on the sagittal plane and the attenuation magnitude of impact shock at high frequency (9~20 Hz) in the support phase during downhill running. Method: Fifteen male heel-toe runners with no history of lower extremity injuries were recruited for this study (age, $25.07{\pm}5.35years$; height, $175.4{\pm}4.6cm$; mass, $75.8{\pm}.70kg$). Two uniaxial accelerometers were mounted to the tuberosity of tibia and sacrum, respectively, to measure acceleration signals. The participants were asked to run at their preferred running speed on a treadmill set at $0^{\circ}$, $7^{\circ}$, and $15^{\circ}$ downhill. Six optical cameras were placed around the treadmill to capture the coordinates of the joints of the lower extremities. The power spectrum densities of the two acceleration signals were analyzed and used in the transfer function describing the gain and attenuation of impact shock between the tibia and the sacrum. Angles of the knee and ankle joints on the sagittal plane and their angle ranges were calculated. The Pearson correlation coefficient was used to test the relationship between two variables, the magnitude of impact shock, and the range of joint angle under three downhill conditions. The alpha level was set at .05. Results: Close correlations were observed between the knee joint range of motion and the attenuation magnitude of impact shock regardless of running slopes (p<.05), and positive correlations were found between the ranges of motion of the knee and ankle joints and the attenuation magnitude of impact shock in $15^{\circ}$ downhill running (p<.05). Conclusion: In conclusion, increased knee flexion might be required to attenuate impact shock during downhill and level running through change in stride or cadence while maintaining stability, and strong and flexible ankle joints are also needed in steeper downhill running.
#Downhill running #Accelerometer #Impact shock #High frequency #PSD #Correlation coefficient #Shock attenuation #Joint angle

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참고문헌 (43)

참고문헌 신청
Azevedo, L. B. / 2009 / Biomechanical variables associated with Achilles tendinopathy in runners / British Journal of Sports Medicine 43(4):288~292 google schola Bennell, K. / 2004 / Ground reaction forces and bone parameters in females with tibial stress fracture / Medicine and Science in Sports and Exercise 36(3):397~404 google schola Bobbert, M. F. / 1991 / Calculation of vertical ground reaction force estimates during from positional data / Journal of Biomechanics 24(12):1095~1105 google schola Bredeweg, S. / 2011 / No relationship between running related injuries and kinetic variables / British Journal of Sports Medicine 45(4):328 google schola Buczek, F. L. / 1990 / Stance phase and ankle kinematics and kinetics during level and downhill running / Medicine and Science in Sports and Exercise 22(5):669~677 google schola

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