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논문 기본 정보

자료유형
학술저널
저자정보
Lee, Geun-Hyuk (Department of Physical Education, Graduate School of Konkuk University) Kim, Jai-Jeong (Division of humanities and Liberal Arts, College of Humanities and Social Sciences, Hanbat National University) Kang, Sung-Sun (Department of Physical Education, Graduate School of Konkuk University) Hong, Ah-Reum (Department of Physical Education, Graduate School of Konkuk University) So, Jae-Moo (Department of Physical Education, College of Education, Konkuk University)
저널정보
한국운동역학회 한국운동역학회지 한국운동역학회지 제26권 제1호
발행연도
2016.1
수록면
11 - 20 (10page)

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Objective: This study aimed to compare biomechanical data between elite and beginner cyclists during cycle pedaling by performing a comparative analysis and to provide quantitative data for both pedaling performance enhancement and injury prevention. Methods: The subjects of this study included 5 elite cyclists (age: $18{\pm}0years$, body mass: $64.8{\pm}9.52kg$, height: $173.0{\pm}4.80cm$) and 5 amateur cyclists (age: $20{\pm}0years$, mass: $66.6{\pm}2.36kg$, height: $175.6{\pm}1.95cm$). The subjects pedaled on a stationary bicycle mounted on rollers of the same gear (front: 50 T and rear: 17 T = 2.94) and cadence of 90. The saddle height was adjusted to fit the body of each subject, and all the subjects wore shoes with cleats. In order to obtain kinematic data, 4 cameras (GR-HD1KR, JVC, Japan) were installed and set at 60 frames/sec. An electromyography (EMG) system (Telemyo 2400T, Noraxon, USA) was used to measure muscle activation. Eight sets of data from both the left and right lower extremities were obtained from 4 muscles (vastus medialis oblique [VMO], vastus lateralis oblique [VLO], and semitendinosus [Semitend], and lateral gastrocnemius [Gastro]) bilaterally by using a sampling frequency of 1,500 Hz. Five sets of events ($0^{\circ}$, $90^{\circ}$, $180^{\circ}$, $270^{\circ}$, and $360^{\circ}$) and 4 phases (P1, P2, P3, and P4) were set up for the data analysis. Imaging data were analyzed for kinematic factors by using the Kwon3D XP computer software (Visol, Korea). MyoResearch XP Master Edition (Noraxon) was used for filtering and processing EMG signals. Results: The angular velocity at $360^{\circ}$ from the feet was higher in the amateur cyclists, but accelerations at $90^{\circ}$ and $180^{\circ}$ were higher in the elite cyclists. The amateur cyclists had greater joint angles at $270^{\circ}$ from the ankle and wider knee joint distance at $0^{\circ}$, $180^{\circ}$, and $360^{\circ}$ than the elite cyclists. The EMG measurements showed significant differences between P2 and P4 from both the right VLO and Semitend. Conclusion: This study showed that lower body movements appeared to be different according to the level of cycle pedaling experience. This finding may be used to improve pedaling performance and prevent injuries among cyclists.
#Cycle #Pedaling #Cycle pedaling #Skill level #EMG

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참고문헌 (15)

참고문헌 신청
Abdel-Aziz, Y. / 1971 / Direct linear transformation into object space coordinates in close-range photogrammetry / proc. symp. close-range photogrammetry :1~18 google schola Atkinson, G. / 2007 / Distribution of power output during cycling / Sports Medicine 37(8):647~667 google schola Bailey, M. P. / 2003 / Kinematics of cycling in relation to anterior knee pain and patellar tendinitis / Journal of Sports Sciences 21(8):649~657 google schola Dorel, S. / 2009 / Changes of pedaling technique and muscle coordination during an exhaustive exercise / Medicine+ Science in Sports+ Exercise 41(6):1277 google schola Han, W. S. / 2013 / Sport science: Cycle fitting and Sport science / Sport Science 124:46~55 google schola

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