著者
戸邉 直人 苅山 靖 林 陵平 木越 清信 尾縣 貢
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.18044, (Released:2019-10-28)
参考文献数
42

In the take-off motion of the high jump, huge power exerted by the lower limb is required in a very short time. Consequently, to achieve the take-off motion, improvement of power exertion ability is important, and most high jumpers work to achieve this. However, the components of the kinetics that contribute to high jump performance are unknown. This study investigated lower limb joint kinetics during the take-off phase of the high jump and the relationships between kinetic variables and performance. Seven male high jumpers were investigated. Their take-off motions were filmed using an infrared camera (Vicon Motion System, 250 Hz), and the ground reaction force was recorded using a force platform (Kistler, 9287C, 1000Hz). The coefficients of correlation between the vertical velocity of the center of gravity of the whole body (CG) at the moment of take-off and kinetic variables were calculated. The following results were obtained: 1. The muscles involved in hip extension play a primary role in shock absorption at the moment of touchdown. Furthermore, the muscles involved in hip abduction, knee extension and ankle plantarflexion play a significant role in lifting the body in addition to the above functions. 2. The concentric power produced by hip abductors during the take-off motion may increase vertical velocity of the CG at the moment of take-off. 3. As it has been reported that single leg exercises impact the function of hip abductors, such exercises may improve take-off motion in the high jump. These results illustrate the characteristics of take-off motion in the high jump, and these may be studied further to plan effective training aimed at improving performance.
著者
木越 清信 尾縣 貢 田内 健二 大山 卞 圭悟 高松 薫
出版者
The Japanese Society of Physical Fitness and Sports Medicine
雑誌
体力科学 (ISSN:0039906X)
巻号頁・発行日
vol.52, no.2, pp.167-178, 2003-04-01 (Released:2010-12-10)
参考文献数
16
被引用文献数
2 3

本研究の目的は, 5秒間の全力ペダリング運動中における座位姿勢の変化が下肢筋群の筋活動および最大パワーに及ぼす影響を明らかにすることであった.被験者には, 大学陸上競技部に所属する男性10名 (21.5±1.9yrs, 178.8±4.7cm, 71.0±5.6kg) を用い, シートの高さを変化させた3種類 (High, MiddleおよびLow) の試技条件下で, それぞれ5秒間のペダリング運動を体重×0.1kpの負荷で行わせた.主な結果は以下の通りである.1.3回転の最大パワーは, HighがLowと比較して有意に高値を示した.2.骨盤傾斜角度は, HighおよびMiddleがLowと比較して有意に高値を示した.3.膝関節最大伸展角度および屈曲角度は, High, MiddleおよびLowの川頁に有意に高値を示した.4.脊柱起立筋および大腿二頭筋におけるmEMGは, HighがLowと比較して有意に高値を示した.5.Highにおいては, 3回転の最大パワーと大殿筋におけるmEMGとの間に有意な正の相関関係が認められた.また, 3回転の最大パワーと大腿二頭筋および外側広筋におけるmEMGとの間に正の相関傾向が認められた.以上の結果から, 5秒間の全力ペダリング運動において, シート高の変化による座位姿勢変化は下肢筋群, 特に股関節伸展筋群の筋張力および最大パワーに影響を及ぼす可能性があることが示唆された.
著者
白木 駿佑 木越 清信
出版者
The Japan Journal of Coaching Studies
雑誌
コーチング学研究 (ISSN:21851646)
巻号頁・発行日
vol.32, no.2, pp.253-264, 2019-03-20 (Released:2019-09-02)
参考文献数
15

This is the case study that the race pattern of a 400-m sprint was improved by “Affirmation”. The affirmation is a method of accomplishing goal and used in the world for business, education and so on. The purpose of this study was to obtain practical wisdom when using the affirmation to sports. A male sprinter had been having the problem of the 400-m race pattern and tried to solve it by the affirmation. Then, while correcting the affirmation sheet each time the race was done, the problem was solved four months from beginning to use the affirmation. He could not realize the image of the race pattern in the first half of the practical process. But in the second half of the practical process, he changed the contents of affirmation sheet greatly, realized the target model of race pattern which is the moderate deceleration type one month later. Besides, he had read the short affirmation sheet every day during this practice process. From this process, it was suggested that it is difficult to make the high-quality affirmation sheet in a short period from using it for the first time, and that it is necessary to use the short sentence involved realistic and clear image for continuous implementation of affirmation.
著者
山元 康平 宮代 賢治 内藤 景 木越 清信 谷川 聡 大山卞 圭悟 宮下 憲 尾縣 貢
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.59, no.1, pp.159-173, 2014 (Released:2014-06-13)
参考文献数
39

This study was conducted to clarify the relationship between race pattern and performance in the men's 400-m race. Using several video cameras, 154 male 400-m sprinters (45-46 s: 26, 47 s: 35, 48 s: 58, 49 s: 35) in official competitions were videotaped at a sampling rate of 59.94 Hz from the start to the finish. The split time at every 50 m from the start was calculated using the Overlay method, which analyzes the split time by superimposing an image of the 400-m race onto an image of the hurdles in a 400-m hurdle race. Each segment was defined as follows: First segment, from the start to the 100-m mark; 2nd segment, from the 100-m mark to the 200-m mark; 3rd segment, from the 200-m mark to the 300-m mark; 4th segment, from the 300-m mark to the finish. The results of regression analysis revealed significant correlations between the 400-m race time and the all of the segment times (r=0.589-0.887, p<0.001), the ratio of the time for the 3rd segment (r=0.290, p<0.001) to that of the 4th segment (r=0.218, p<0.01), the rate of change in running speed from the 1st to the 2nd segments (r=−0.317, p<0.001), and that from the 2nd to the 3rd segments (r=−0.271, p<0.01). However, the relationship between the 400-m race time and the deceleration index (the slope of the linear relationship between running speed and the number of segments from the peak running speed to the finish) was not significant (r=0.154, p=0.056). These results suggest that it is important to maintain running speed in the 2nd and 3rd 100-m segments to achieve high performance in the 400-m sprint.
著者
尾縣 貢 木越 清信 遠藤 俊典 森 健一
出版者
一般社団法人日本体力医学会
雑誌
体力科学 (ISSN:0039906X)
巻号頁・発行日
vol.64, no.1, pp.117-124, 2015

Purpose of this study was to examine the recovery process of delayed onset muscle soreness, jump performance, force to contact with the ground and lower limbs movement after intensive jump exercise (IJE), and the relationships between muscle soreness, changes of jump performance and lower limbs movement. Nine males who have experience in special jump exercise participated in this study voluntarily. For the measurement, subjective investigation of the muscle soreness, drop jump performance using a 30 cm high box [jump height, contact time and drop jump index (jump height / contact time)], ground reaction force and movements of lower limbs. This measurement was carried out before IJE (Pre), and at 4 hours (P4), 24 hours (P24) and 72 hours (P72) after IJE. Main results are as follows ; at the time of P24 when intense muscle soreness appeared, significant jump height decreases and contact time increases were shown, and the jump index decreased markedly. This decrease of performance correlated to the change of knee and ankle joint movements during the eccentric phase. At P4, for a subject who felt strong muscle soreness, the decrease of jump height and jump index were considerable. At P72, most subjects recovered to the levels of jump height and contact time to the Pre level. The findings reveal that the jump performances are related to the degree of delayed onset muscle soreness.
著者
白木 駿佑 尾縣 貢 木越 清信
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.63, no.1, pp.433-440, 2018-06-10 (Released:2018-06-20)
参考文献数
17

This study investigated the relationship between exercise intensity and energy contribution in shortduration intensive exercise. Two competitive university sprinters performed 30-s pedaling tests at 4 high intensity levels, following a submaximal test to determine the energy contribution during the 30-s pedaling tests by using the linear regression between exercise power and O2 demand. The energy contribution in each subject was almost constant during the 30-s pedaling tests at the 4 high intensity levels. Furthermore, O2 uptake and peak blood lactate concentration increased with increasing O2 demand in each subject. These results suggest that the energy contribution during short-duration intensive exercise at different high intensity levels is almost constant and that aerobic and anaerobic energy increase with increasing exercise intensity in each individual.
著者
梶谷 亮輔 前村 公彦 山元 康平 関 慶太郎 尾縣 貢 木越 清信
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.63, no.1, pp.139-149, 2018-06-10 (Released:2018-06-20)
参考文献数
20
被引用文献数
1

The aim of this study was to examine the validity, reliability, and utility of a method for evaluating the characteristics of the counter movement jump. Fifty-two male track and field athletes (sprinters or decathletes) jumped from a 30-cm platform and consciously changed their counter movement times. This study determined the counter movement time required to achieve the highest jump. The results are summarized as follows: 1. The waveform between the counter movement time and jumping height was an inverted U-shape. 2. It is normally accepted that the optimum counter movement time is determined via the jump test. 3. There was a significant correlation between the first test and the re-test in terms of the counter movement time. 4. Participants were classified into 5 groups based on their optimum counter movement times and highest jumping heights. These results suggest that the newly developed jumping test discussed in this study is a valid method for evaluating the characteristics of counter movement.
著者
大宮 真一 木越 清信 尾縣 貢
出版者
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.54, no.1, pp.55-66, 2009

本研究では,一般の小学6年生の113名(男子53名,女子60名)および小学生走り幅跳び競技者9名(男子5名,女子4名)を対象にして,走り幅跳びにおける踏切局面の画像分析とRJ能力(RJ-index:RJの跳躍高を接地時間で除した値)の測定を行った.RJ能力の優劣によって一般小学生をExcellent群,Medium群およびPoor群に分類し,また小学生競技者をAthlete群として,これらの4群間における踏切に関する変数を比較することにより,小学校6年生におけるRJ能力が走り幅跳び能力に及ぼす影響について検討した.主な結果は以下の通りである.1)一般小学生において,男子および女子のExcellent群は他の2群と比較して踏込速度および踏切初速度が高く,跳躍距離が大きかった.また,Excellent群は他の2群と比較して踏切時間が短く,その中で大きな鉛直方向の力を発揮し,高い鉛直初速度を獲得していた.一方,水平速度の減少量は,男女とも3群間に有意差は認められなかった.2)男子および女子のAthlete群は,それぞれのExcellent群と比較してRJ-indexおよびRJの跳躍高が優れていた.さらに,Athlete群は踏込速度,踏切初速度および跳躍距離も有意に高い値を示し,より短い踏切時間の中で大きな鉛直力を発揮し,高い鉛直初速度を獲得していた.以上のことから,小学校6年生におけるRJ能力は助走速度,跳躍距離および鉛直初速度に影響を及ぼしていることが明らかとなった.
著者
遠藤 俊典 田内 健二 木越 清信 尾縣 貢
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.52, no.2, pp.149-159, 2007-03-10 (Released:2007-06-21)
参考文献数
30
被引用文献数
15 8

A study was conducted to investigate the age-related development of rebound and counter movement jumping ability. A total of 1137 boys (6 yr: 59, 7 yr: 82, 8 yr: 69, 9 yr: 142, 10 yr: 105, 11 yr: 169, 12 yr: 103, 13 yr: 110, 14 yr: 77, 15 yr: 66, 16 yr: 73, and 17 and 18 yr: 82) conducted counter movement jumping (CMJ) as a non-ballistic movement and five-repeated rebound jumping (5RJ) as a ballistic movement. Jumping ability was assessed using CMJ jumping height and the value obtained by dividing jumping height by the ground contact time in 5RJ (RJ-index). CMJ jumping height and the RJ-index in 5RJ increased in accordance with growth. Development of the RJ-index in 5RJ depended on the increase in jumping height, because ground contact time did not change even though jumping height increased with growth. There was a significant correlation between CMJ jumping height and RJ-index in 5RJ (r=0.765, p<0.001, r2=0.585). Division of jumping ability types was based on±1SD of the residual. These types were as follows: CMJ ability corresponded to RJ ability (CMJ=RJ: n=810), RJ ability was superior to CMJ ability (Good RJ: n=165) and RJ ability was inferior to CMJ ability (Poor RJ: n=162). The number of Good RJ and Poor RJ types increased between the ages of 9-13 years, which is the onset of the growth spurt. These results suggest that CMJ jumping height and RJ-index in 5RJ increase in accordance with growth, but the processes of age-related development of both types of jumping ability do not necessarily correspond to each other, and developmental differences between individuals tend to increase at the onset of the growth spurt.
著者
木越 清信
巻号頁・発行日
2013

科学研究費助成事業(科学研究費補助金)研究成果報告書:若手研究(B)2010-2012