著者

宮西 智久 柴山 一仁 門野 洋介

出版者

社団法人日本体育学会

雑誌

日本体育学会大会予稿集

巻号頁・発行日

no.63, 2012-08-22

著者

柴山 一仁 貴嶋 孝太 森丘 保典 櫻井 健一

出版者

一般社団法人 日本体育学会

雑誌

体育学研究 (ISSN:04846710)

巻号頁・発行日

pp.18120, (Released:2019-07-05)

参考文献数

19

被引用文献数

2

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The present study aimed to define the phases of the 110m hurdle race and to clarify the relationship between the race pattern and performance of elite hurdlers. Seventy-six male hurdlers (groups: G1, 12.94–13.38 s, n = 24; G2, 13.40–13.68 s, n = 26; G3, 13.70–14.16 s, n = 26) participating in official competitions were videotaped using high-speed video cameras panning from start to finish (239.76 or 299.70 Hz). The landing step after hurdling was defined as the first step, and the take-off step was defined as the fourth step. The timing of each step and each interval (from touchdown on the landing step to the next landing step) were calculated. Intervals were divided into the acceleration phase (G1: from 1st to 2nd, G2 and G3: 1st), maximum velocity phase (G1: from 3rd to 5th, G2 and G3: from 2nd to 5th) and deceleration phase (G1, G2 and G3: from 6th to 9th). The results obtained were as follows: 1) Faster hurdlers sprinted with a shorter time and a larger mean interval velocity in all phases; 2) G1 had longer acceleration segments and larger acceleration from the acceleration phase to maximum velocity phase than G2 and G3 because of the larger increase in the frequency of the second step; however, deceleration from the maximum velocity phase to the deceleration phase showed no significant difference according to performance; and 3) the pattern of change in the mean interva3l velocity during the race was similar between G2 and G3. These results indicate that athletes in G2 need to improve their race pattern to achieve a larger acceleration in the 2nd interval by sprinting with a larger increase in the frequency of the second step. Improvement of the race pattern is less important for G3. Additionally, G2 and G3 need to improve their sprinting velocity to obtain a higher frequency at the fourth step.

著者

柴山 一仁 藤井 範久 阿江 通良

出版者

一般社団法人 日本体育学会

雑誌

体育学研究 (ISSN:04846710)

巻号頁・発行日

vol.56, no.1, pp.75-88, 2011 (Released:2011-07-08)

参考文献数

18

被引用文献数

1 1 1

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The purpose of this study was to investigate the kinematic characteristics of World and Japanese elite 110-m hurdlers during 1-cycle motion in relation to running velocity and leg length. Twenty-nine male hurdlers (SB: 12.92-14.37 s) participated. The motions from touchdown of the lead leg at the 6th hurdle (1st step) to touchdown of the takeoff leg at the 7th hurdle (4th step) were videotaped using a digital VTR camera (60 Hz), and two-dimensional coordinates were calculated based on calibration marks. The motions from touchdown of the takeoff leg at the 7th hurdle to touchdown of the lead leg at the 7th hurdle (1st step) were videotaped using two high-speed VTR cameras (200-300 Hz), and converted to two-dimensional coordinates after calculation of the three-dimensional coordinates using a DLT method. Kinematic parameters were calculated, including step length, step frequency, angles and angular velocities of the shank and thigh, and durations of the support and airborne phases. Stepwise multiple regression analysis was conducted with kinematic parameters as dependent variables, and with running velocity and leg length as independent variables at p<.05. The results were as follows: (1) Faster hurdlers achieved a higher step frequency with less range of thigh motion of the takeoff leg during the 2nd step. (2) The 3rd step played a role in adjusting the step length and preparing for hurdling, especially in hurdlers with a shorter leg length when preparing to increase the vertical GRF in the 4th step. (3) The allocation of time from takeoff at the 4th step to touchdown at the 2nd step was dependent on leg length. (4) Faster hurdlers achieved smaller vertical displacement of CG during the 1st step by shortening the support time to keep the position of the thigh perpendicular at the 2nd step. These results show that faster hurdlers achieved shorter durations of 1-cycle motion because of the increasing in horizontal CG velocity during the shorter support time at the 2nd step.

著者

宮西 智久 柴山 一仁 門野 洋介

出版者

社団法人日本体育学会

雑誌

日本体育学会大会予稿集

巻号頁・発行日

no.64, 2013-08-28