著者

伊藤 恵造 松村 和則

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.54, no.1, pp.77-88, 2009-06-30 (Released:2009-11-05)

参考文献数

58

被引用文献数

6 3

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Much attention is now being paid to the concept of “Community”. Not only in the field of urban sociology but also in the sociology of sport, “Community” is a key concept for understanding and resolving structural problems faced by both urban and rural residents.Discussions on the “public sphere of sport”, however, have run into deadlock when dealing with certain concrete structural problems. Furthermore, sports sociologists working on how sports practice can develop in communities have never been part of cumulative discussions in the field of urban sociology.The scope of studies on “Sport and Community” should involve a time-axis (historical-cultural) perspective to counterbalance the ideal and spatial frameworks. Apart from discussion on sport in relation to “human rights” and the “public good”, we must pay much attention to sites at which sport can create a new community by contributing to the resolution of structural problems. We will then be able to enter into a discussion on the “public sphere” created by sport practices.Urban sociology in Japan acknowledges sport as a medium that gives people a chance to meet each others in an urban setting. However, it has never been acknowledged as a public benefit that can contribute to creating an “autonomous community” for urban dwellers. We in the field of sports sociology should focus on places where people have tried to create “autonomous communities” through sports practices.

著者

木下 秀明

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.55, no.2, pp.409-440, 2010

被引用文献数

1

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In 1903, the Japanese Ministry of Military Affairs revised the manual of military gymnastics, the so-called <i>taiso kyohan</i>. In 1913, the Ministry of Education formulated the syllabus of gymnastics to be taught in schools, <i>gakko taiso kyojyu yomoku</i>. It has generally been considered that this syllabus was based mainly on the Swedish system of gymnastics. In the present study, I set out to clarify whether many of the gymnastic exercises performed on apparatus (except for hand-tools) as specified in the manual were designed for secondary school boys in the syllabus. The period studied was that from the time when the report <i>taiso yugi torishirabe hokoku</i>, meaning &ldquo;an investigation of gymnastics, play and games in schools&rdquo; was published in 1905 by the research committee authorized by the Ministry of Education, until the publication of the 1913 syllabus. The Ministry of Education had planned the syllabus in response to a demand from the Ministry of Military Affairs to formulate a school gymnastics program based on military lines, because the report had proposed the abolition of military gymnastics in schools. My research involved not only the use of general documents but also analysis and comparison of tables describing each phase of the exercises published in the manual, the report itself, and the syllabus, in order to verify relationships among them.<br> Based on the available materials, I concluded it was far from certain that there had been an insistence to include military gymnastics in school gymnastics, in spite of the fact that some military gymnastic exercises were listed in the report. Accordingly, the Ministry of Military Affairs had requested the Ministry of Education to devise a school gymnastics program based on military lines. &ldquo;Heaving movements&rdquo;, a component of the original Swedish gymnastics, which had been translated as <i>jyoshi no undo</i>, meaning &ldquo;arm-movements&rdquo;, was divided into two parts in the syllabus. One was <i>jyoshi no undo</i>, meaning &ldquo;arm-movements&rdquo;, except for exercises performed on apparatus, and the other was the new term, <i>kensui undo</i>, meaning &ldquo;chin-up movements&rdquo;, which literally covered a broad range of exercises including chin-ups and pull-ups on gym apparatus, because the two terms <i>kensui undo</i> and <i>cyoyaku undo</i>, meaning &ldquo;jumping and vaulting movements&rdquo;, were necessary in order for the syllabus to comply with the demand for military gymnastics. Military gymnastics was one of two main gymnastic systems in the syllabus, because the two partitions were composed of military gymnastics, as was the case for Swedish gymnastics.<br>

著者

豊嶋 陵司 桜井 伸二

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.2, pp.479-493, 2018-12-10 (Released:2018-12-20)

参考文献数

47

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This study investigated the relationships between the kinetic factor of the swing leg and step frequency (SF) and step length (SL) during the top speed phase of a sprint. Sixteen male sprinters (age 19.3±0.6 years, height 1.74±0.06 m, weight 66.1±5.2 kg) performed maximum effort 60-m sprints. Video data from the 43.5- to 50-m section of the sprint were collected using a high-speed camera (300 Hz). SF index and SL index were calculated to exclude the influence of body height on the outcomes of interest. Torque and torque power of the hip and knee joints of the right leg were calculated during the swing phase of the right leg. The time of the swing phase of the right leg was normalized so that the take-off of the right foot, touchdown of the left foot, take-off of the left foot, and touchdown of the right foot were 0%, 100%, 200%, and 300%, respectively. For every 5% of normalized time, partial correlation analysis was conducted between the right leg kinetics and SF index (controlling SL index) and SL index (controlling SF index). The SF index was associated with a large hip flexion torque and a large hip extension torque during 10–60% and 250–280% of the swing phase, respectively. Moreover, large peaks of the hip flexion torque and positive power were associated with a high SF index (r = -.718, p <0.01; r = .531, p <0.05, respectively). The SL index was associated with a hip flexion torque during 20–30% of the swing phase, although there was no significant partial correlation between the SL index and peak hip flexion torque (r = -.381, p = .161). In addition, a high SL index was associated with early appearance of the peak hip flexion torque power (r = -.759, p <0.01). In conclusion, throughout the top speed phase of a sprint, a high SF index requires a large torque and hip joint power for the leg swing over a short duration, and a high SL index requires an early increase of hip flexion torque power.

著者

小木曽 一之 串間 敦郎 安井 年文 青山 清英

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.41, no.6, pp.449-462, 1997-03-10 (Released:2017-09-27)

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The puropose of this study was twofold: (a) to investigate the pattern of change in the sprinting speed that is the final results of the sprinting movements, and (b) to find out whether the characteristics in the sprinting speed change due to the differences in age, sex, sprinting ability and training status. One-hundred thirty male and 123 female ordinary students aged 6 to 18, and 30 male and 23 female sprint runners aged 9, 10, 11 and 18 participated in this study. They were instructed to excute an exhaustive sprinting. Sprinting times ranged from about 20 to 30 sec. The elapsed times were measured every five meters in their sprinting. In the analysis, the polynomial curve fitting from 5th-degree to 9th-degree was used for the predictions of the sprinting distances with respect to the elapsed times every 0.1 sec. From the relations of the distances to times the following speeds were computed: 1) the sprinting speed that was computed by differentiating the sprinting distance, and 2) the average speed form start to the elapsed time every 0.1 sec. The sprinting speed reached the peak speed after about 6to 7 sec from start. The average speed showed the peak speed after about 15 sec from start. These characteristics with respect to time remained unchanged despite the differences in age, sex, sprinting performance and training status. The time at the maximum average speed was particularly stable. The maximum average speed was about 90% of the maximum sprinting speed. This result also remained unchanged despite the differences in age, sex, sprinting performance and training status,respectively. These results indicate that the pattern of change in the sprinting speed with respect to time is rather constant without the distinction of age, sex, sprinting performance and training status. The sprinting performance, however, improved with age and by training. This result was mostly caused by the increase of the maximum sprinting speed with age and by training. These characteristics with respect to time and speed seem to cause the differences in the sprinting distance.

著者

加藤 元和

出版者

社団法人日本体育学会

雑誌

体育學研究 (ISSN:04846710)

巻号頁・発行日

vol.16, no.2, pp.61-66, 1971-10-01

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この研究では,古代オリュンピア祭典競技の起源を巡る諸問題を取り拳げた.1)歴史的事象としての古代オリュンピア祭典競技は,神話,伝承に於ける神々や英雄たちの競技の世界やホメロスの詩篇オデユツセイアやイリアスに於ける競技の世界の延長として出現したのでなく,それら三者の間には,密接な相互関係があった. 2) ゼウス崇拝とオリュンピア祭典競技との結びつきは,エリス人のゼウス崇拝とピザ人のべロプス崇拝及び両ポリス市民間に於けるオリュンピア祭典競技の主催権を巡る対立・抗争を通して確立されてきたのである. 3) オリュンピア祭典競技の起源は,最もギリシア的国制としてのポリス共同体の存在を前提とせねばならなかったのである.それは,自由,自治,自給自足という共同体の特性が,逆に,民族的統一理念としての汎ギリシア精神の具現体としてのオリュンピア祭典競技を体制化したのである.

著者

蔭山 雅洋 鈴木 智晴 杉山 敬 和田 智仁 前田 明

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.60, no.1, pp.87-102, 2015 (Released:2015-06-13)

参考文献数

34

被引用文献数

4 3

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The purpose of this study was to clarify the relationship between ball velocity and the mechanical power of the lower limbs during pitching motion in 30 collegiate baseball pitchers. 3-dimensional positions of 37 reflective markers attached to the subject were tracked by an optical motion capture system (Mac3D System) with 12 cameras. The ground-reaction forces (GRF) of the pivot and stride legs during pitching were determined using 2 multicomponent force plates. Pitching motion was assessed in terms of the joint torques, joint torque powers and work done by each of joint in the lower limbs using a three-dimensional motion system. The joint torques of the hip, knee, and ankle were calculated using inverse-dynamics computation of a musculoskeletal human model (nMotion musculous 1.51). Pitching motion was divided into 2 phases: phase 1 was defined as the time taken from the knee of the stride leg reaching maximal height (MKH, 0%time) to the stride foot making contact with the ground (SFC, 100%time), and phase 2 was defined as the time taken from SFC to the ball being released (REL, 200%time).  These studies revealed that the positive work resulting from hip abduction (r=0.401) and knee extension (r=0.355) of the pivot leg (Phase 1) was positively correlated with ball velocity (p<0.05). The positive work resulting from hip adduction (r=0.359) and knee extension (r=0.409) of the stride leg (Phase 2) was positively correlated with ball velocity (p<0.05). In addition, the pitched ball velocity was positively correlated with pivot hip abduction torque at 74–94%time, pivot hip internal rotation torque at 76–89%time, stride hip adduction torque at 96–114%time, stride hip adduction torque power at 108–114%time, stride knee extension torque at 101–131%time, stride knee extension angular velocities at 158–189%time, and stride knee extension torque power at 156–174%time (p<0.05).   These results indicate that a pitcher with high pitched ball velocity can generate hip abduction and knee extension power of the pivot leg, and that these are increased by hip abduction and hip internal rotation torque when moving the body forward before stride foot contact. In addition, it is suggested that high-ball-velocity pitchers can generate hip abduction and knee extension torque in order to stabilize the body just after stride foot contact, and that these are increased by the knee extension power for increasing trunk rotation and trunk twisting from the first half to the middle of the second phase.   Therefore, the present results indicate that pitchers with a higher ball velocity can generate greater mechanical power of the lower limbs for increasing the energy of trunk rotation and the arm.

著者

小宮 秀明 佐々木 絵未 黒川 修行

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.61, no.1, pp.29-42, 2016 (Released:2016-06-17)

参考文献数

19

被引用文献数

1

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High/low alcohol tolerance is determined by genetic polymorphisms of ADH2 and ALDH2. Currently, operators conduct ethanol patch testing for assessment of alcohol tolerance in a subjective manner; therefore, the test results may vary among individuals. The present study was designed to verify the reliability of ethanol patch testing, with a focus on changes in skin color due to seasons. Two operators were assigned to perform ethanol patch tests, and alcohol-related genetic polymorphisms were evaluated to verify the results.  The study included 129 healthy students from Utsunomiya University (age range: 21-24 years). These students were selected because they met the eligibility criteria for the study (all necessary information had to be available, i.e. results for all questionnaire items and patch tests, as well as genetic analysis). Alcohol-related genes tested in this study were ADH2 and ALDH2. During the ethanol patch tests, two operators examined the subjects' cutaneous reactions immediately after lint pad had been removed from their skin, and at 10 min after removal.  Ethanol patch test to the subjects was performed twice: once in summer and once in winter. We also administered a questionnaire to assess the students' views on alcohol and drinking habits. According to the cutaneous reactions examined at 10 min, there was significant concordance between the results of ethanol patch tests and ALDH2 genetic polymorphisms. The results of the patch tests performed by the 2 operators (A and B) in summer showed that the concordance rate between the operators was 93.8% (κ coefficient: 0.889; 95% confidence interval: 0.815-0.962, p<0.001) for the cutaneous reactions at 10 min after lint pad removal. Moreover, the same operator's data showed that the concordance rate between the results of the summer and winter patch tests was 70% or higher. These findings suggest that ethanol patch testing is a reliable assay of alcohol tolerance, although the results may be influenced by seasons and individual operator subjectivity. Therefore, during ethanol patch tests, it is important to take into account test conditions such as the time of year and skin color, and to evaluate the results comprehensively.

著者

図子 浩二 高松 薫

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.40, no.1, pp.29-39, 1995

被引用文献数

1 6

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Rebound drop jump index [RDJ_&ltindex&gt=(1/8・g・RDJt_a^2)/RDJt_c] was developed to evaluate the ability to perform the ballistic stretch. shortening cycle (SSC) movement. The RDJ_&ltindex&gt consists of ability to jump higher (RDJt_a) and that to shorten the contact time (RDJt_c) in rebound drop jump (RDJ), a typical SSC movement. The former is affected by leg strength and counter movement jump ability but the factors affecting the latter case have not yet been well established. This study examined the factors to shorten the contact time with special reference to two important views, i.e. work done by the lower limb joints and anticipation of the landing. 1. Relationships between work done by the lower limb joints and RDJ_&ltindex&gt, RDJt_c, and RDJt_a in RDJ from height of 0.3m were examined in ten college male athletes. There was a significant correlation between the ratio of negative work at the ankle to total work done by the lower limb joints and RDJ_&ltindex&gt (r=0.726, p&lt0.05), and RDJt_c (r=-0.823, p&lt0.01) but not RDJt_a (r=0.226,ns). Furthermore, there was no significant correlation between the ratio of negative work at the ankle and maximum plantar flexion strength (r=-0.329,ns). These results suggested that the rate of energy absorption at the ankle joint in former contact phase was one important factor to shorten the contact time in RDJ but not affected by plantar flexion strength. 2. RDJ_&ltindex&gt, RDJt_c and RDJt_a in two RDJs with or without visual information to inhibit temporal and spatial anticipation of landing were compared in six college male athletes. As compared without and with visual information, RDJt_c was longer, RDJt_a was shorter and RDJ_&ltindex&gt was lower, significantly. These changes were greater in subjects showing the higher RDJ_&ltindex&gt than those showing the lower RDJ_&ltindex&gt. Furthermore, changes of RDJ_&ltindex&gt, RDJt_c and RDJt_a in series of nine RDJs without visual information at thirty seconds of rest intervals were compared between subject A showing high RDJ_&ltindex&gt and subject B showing low RDJ_&ltindex&gt. RDJt_c decreased and RDJt_a increased slightly, and RDJ_&ltindex&gt increased by repeated trials even without visual information in subject A but not in subject B. These results suggested that temporal and spatial anticipation of the landing were another important factors to shorten the contact time in RDJ. These finding seemed to be beneficial for establishing strength and power training methods for jumper and ballgame players who are required ballistic stretch-shortening cycle movement.

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

被引用文献数

2

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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

岡田 桂

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.15110, (Released:2016-04-06)

参考文献数

28

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This study analyzed the momentum of the (hetero) sexualization of masculinity through physical culture magazines published during the 1930s-1980s in the United States, and also examined the social conditions caused by the corresponding changes. Since Foucault suggested the “repressive hypothesis” of sexuality, it has been widely recognized that, at some moment in modern history, same sex desire was identified as an inevitable identity, rather than just a deviant act, as considered previously.  However, several recent studies have questioned this hypothesis as being oversimplified. By reviewing previous research, this study examined the momentum of segregation between hetero/homosexual desire, which was observed in the 1950s, i.e. much more recently than generally recognized, and the obvious hetero-sexualization of the masculine ideal, which occurred after the 1970s.  The method employed was to compare two major physical culture magazines. To provide a contrasting perspective with regard to different sexuality, the first (famous) physique magazine, which began to be published in 1951 for potentially homosexual customers, was adopted to comparatively and diachronically examine the representation of male figures on the cover pages. This analysis revealed the following results:  1. During the 1930s-1950s, the ideal of masculinity was not yet hetero-sexualized and exemplified a broad range of desire which was not yet segregated as hetero/homosexual.  2. During the 1950s-1960s, physical culture magazines started to exclude non-heterosexual elements from their representations because of the risk that they could be potentially interpreted as homosexual.  3. The rise of the sexual minority rights movement in and after the 1970s, and the 1980s AIDS panic promoted homosexual visibility and expedited homophobia as a form of counter-action. This advance caused rapid and obvious hetero-sexualization of mainstream physical culture media.  In conclusion, the reason for the hetero-sexualization of physical culture magazines was a reaction to the increasing presence of homosexuals. It could be said that the rise of heterosexual self-consciousness itself was, to some extent, a counter to, and paradoxically caused by the creation and increasing awareness of homosexual identity. Moreover, these changes in the masculine ideal, and especially the examples before the 1950s, suggest the possibility of an ideal masculinity shared by hetero/homosexual males, which Sedgwick (2001) suggests is a homosocial continuum—namely, homosociality without discontinuity between homosocial and homosexual desire.

著者

高橋 幸一

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

vol.56, no.1, pp.19-30, 2011

被引用文献数

2

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In recent decades, much evidence for women's sports in the ancient world has been uncovered. In ancient Greece, men concentrated on politics, wars, athletics, and the like, whereas desirable womanly qualities were considered to be beauty, modesty and obedience. Accordingly, no women's events were included in the ancient Olympic Games. It is said that married women were not allowed to be present at Olympia during the games, although unmarried women were permitted to watch the games. Except in militaristic Sparta, athletics were usually for male citizens.<br> However, in the festivals of Hera, only girls could compete in foot-races. Like the boys, Spartan girls paraded naked in the presence of the men and participated in foot-races, wrestling, discus and javelin. Tryphosa, but also her two sisters, competed in and won foot-races in several major athletic festivals, but not at Olympia. Although married women could not compete in the Olympics, they could win Olympic victories in the equestrian events. Thus it is certain that women did participate in athletics. This paper examines the participation of women in sports at the Olympic Games and the festivals of Hera.<br> Except for the priestess of Demeter Chamyne, married women were forbidden to attend the Olympics as spectators. Unmarried women and girls were also excluded from watching the games. In order to prevent bribery, trainers had to present themselves naked and undergo physical examinations. Unmarried women competed every four years in foot-races at the festivals of Hera held at Olympia. Some have suggested that the Heraian games became Panhellenic, but there is no historic evidence for this. The local festivals in which only women and girls were able to participate took place separately from the Olympics.<br> Kyniska of Sparta was the first women's Olympic victor in the four-horse chariot race. Agesilaus persuaded his sister Kyniska to enter a chariot race at Olympia and showed that Olympic chariot victories could be won by wealth and not by manly courage. However, it is certain that Kyniska was exceedingly ambitious to enter the Olympic Games, winning twice in all. However Kyniska's victories did not lead to the spreading of women's sports or to improvement of women's rights.<br>

著者

内藤 貴司 林 聡太郎

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.1-11, 2018-06-10 (Released:2018-06-20)

参考文献数

63

被引用文献数

4

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Individuals with spinal cord injury have a reduced afferent input to the thermoregulation center and lack both sweating capacity and vasomotor control below the level of the spinal cord lesion. A loss of heat loss capacity results in an excessive rise in core temperature, which in turn decreases exercise performance and increases the risk of heat-related illness. To prevent hyperthermia and improve exercise performance during exercise in hot environments, a popular strategy, body cooling, has been proposed. However, despite the interest and vast array of research into cooling strategies for able-bodied humans, less is known about the application of these cooling strategies for individuals with thermoregulatory impairment due to spinal cord injury. The purpose of this review was to investigate effective cooling strategies for attenuating the increase in body temperature in humans with spinal cord injury exercising in a hot environment. Cooling strategies for individuals with spinal cord injury involve external cooling such as water immersion and use of sprays, and cooling garments and internal cooling by ingestion of cold fluid. We addressed the practical issues associated with each of these methods. We concluded from our review that external cooling has been criticized for its impracticality during sporting competitions, although water immersion and the application of cooling garments do reduce the core temperature in individuals with spinal cord injury. However, ice ingestion has recently received considerable interest in studies of able-bodied humans. Therefore, we propose that ice ingestion could be an effective strategy for individuals with spinal cord injury.

著者

高橋 仁大 前田 明 西薗 秀嗣 倉田 博

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.51, no.1, pp.61-69, 2006 (Released:2008-01-25)

参考文献数

8

被引用文献数

1 2 1

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Tennis has a peculiar scoring system. The purpose of this study was clarify the importance of counting one game in tennis matches by studying data from actual games, comprising 42 men's singles matches (907 games) during the Kyushu collegiate tennis championships held in 1997 and 1998. The main criterion for the analysis was the relationship between point-winning at each score and game-winning. It was found that (1) the rate of point-winning by game-winning players was 67.0%, and that the rate of point-winning by opponents was 33.0%. The game-winning players obtained 2/3 of all points. Furthermore (2), the rate of point-winning by players with a leading score was comparatively high at the time of either leading, such as in an up count or a down count, as well as when there was a difference in points at game-point. In particular, the rate of point-winning by game-winning players was significantly high on 0-15 and 15-30. (3) At scores of 30-30 and deuce (i.e. even count), the rate of point-winning by game-winning players was significantly high. These scores led an even count to game-point. These scores also showed a high frequency, and were the key to winning the game. These results suggest that scores of 30-30 and deuce are keys to game-winning, when gaining one point can lead to victory.

著者

豊嶋 陵司 田内 健二 遠藤 俊典 礒 繁雄 桜井 伸二

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.14062, (Released:2015-04-30)

参考文献数

27

被引用文献数

3 3

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The purpose of this study was to clarify the biomechanical factors that influence intra-individual variations in step frequency (SF) and length (SL) during sprint running. One male sprinter participated as a study subject, and performed a 60-m sprint at maximal effort. Experiments were conducted 5 times, with a total number of 14 trials. The ground reaction force and positions of markers attached to the joints were recorded using force plates and a motion capture system. Trials were divided into SF type and SL type depending on the SF/SL ratio, and the kinematic variables and ground reaction force were compared. The main results were as follows.   1)  There were no significant differences in sprint velocity and stance time between the SF type and the SL type.   2)  The flight time of the SL type was longer than that of the SF type.   3)  Vertical components of the ground reaction force and impulse during the stance phase were larger for the SL type than for the SF type.   4)  The thigh angle of the swing leg was larger for the SL type than for the SF type during almost all phases.   5)  The hip joint of the swing leg was flexed to a greater degree during the stance phase and first half of the flight phase for the SL type than for the SF type.   6)  There were no marked differences in the segment and joint angular velocities between the SF type and the SL type.   These results indicate that changes in step frequency and step length with flight time are due to an increase or decrease of vertical impulse. Moreover, it was revealed that vertical impulse is influenced by the thigh angle of the swing leg during the stance phase, rather than by the angular velocity of the swing leg.

著者

山田 理恵

出版者

Japan Society of Physical Education, Health and Sport Sciences

雑誌

体育学研究 (ISSN:04846710)

巻号頁・発行日

2015

被引用文献数

1

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The game of <i>dakyugi</i> (literally, "hitting-ball-game"), involving three components of play (hitting a ball, throwing a ball, and pushing of opponents), is a traditional stick game that has been passed down to the present in Kuwana City (Mie Prefecture).<br>  The purposes of this study were to examine the process of the game's revival and cultural features, and to clarify the significance of <i>dakyugi</i> as a traditional sport in regional development through sports. The materials used in this study were mainly collected through fieldwork at the Rikkyo Area Great Meeting and interviews with members of the preservation association, as well as investigation of historical sources.<br>  In the Meiji era, <i>dakyugi</i> had been played as a bravery game by boys in the Kuwana <i>gijyuku</i>, which inherited the idea of the Rikkyou-kan, a school in the fiefdom of Kuwana. Although <i>dakyugi</i> declined after World War II, it was revived to mark the 150th anniversary of Matsudaira Sadanobu's death in May 1978.<br>  Today, <i>dakyugi</i> is performed at the Kuwana Municipal Rikkyo Elementary School supported by the <i>Dakyugi</i> Preservation Association. Boys and girls of the school play the game at the athletic meeting held jointly by the school and Rikkyo area community. The game of <i>dakyugi</i> in Kuwana is noteworthy in promoting the behavior pattern and style of <i>samurai</i> culture that characterized the Edo era. In addition, <i>dakyugi</i> is considered to play an important role in the revitalization of provincial cities and in the establishment of local regional identity.<br>  The significance of traditional Japanese culture is emphasized in the present school education program. The current study indicates that traditional Japanese sport culture can play an important role in regional development in Japan.<br>

著者

藤野 健太 和田 博史 山内 亮 根本 研 関口 脩 伊藤 雅充

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.62, no.1, pp.187-201, 2017 (Released:2017-06-22)

参考文献数

25

被引用文献数

1

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Strength and Conditioning (S&C) coaches are responsible for improving athletes' performance, which is achieved through various types of training. For athletes who are learning to improve their performance, it is important for the coach to guide their development by asking meaningful questions. The purpose of this study was to investigate the process by which questioning skills can be improved using Action Research (AR) methodology. In this study, 4 cycles of AR were conducted to improve the author's questioning skills, which were both lower-(complex) and higher-order (simple) questions, with avoidance of leading questions. The author of this paper was working as a S&C coach with a collegiate men's volleyball team. Fifteen players voluntarily participated in this study. As part of the AR methodology, the author selected an academic supervisor and a critical friend to observe and provide feedback based on coaching practices. An action plan was formulated through discussions based on the videotaped practices. A systematic observation approach was selected to elucidate behavioral differences in coaches over a 6-week period. A modified version of the Arizona State University Observation Instrument was also used.  Interviews were conducted to reveal athletes' feelings about the coach's use of questioning. Strength and vertical jump performance were assessed before and after the AR intervention. As a result of the AR, the author's questioning skills were improved. There were 3 processes through which questioning skills were improved: 1) increased familiarity with higher-order questioning, which made the athletes think rather than being told, 2) increased time for planning explicit higher and lower-order questions, and 3) challenging the thinking of athletes through the use of questioning to create a better interaction between coach and athletes. This study challenged the author's use and understanding of S&C coach questioning skills for the first time. From this research, the AR procedure was considered to be a very useful tool for improving the coaching skills of S&C coaches. Further research to seek ways of improving the pedagogical skills of S&C coaches will be necessary.

著者

林 裕三 猪飼 道夫

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.10, no.2, pp.168, 1966-07-15 (Released:2016-12-31)

著者

亀井 俊雄 北村 靖治

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.13, no.5, pp.82, 1969-07-31 (Released:2016-12-31)

著者

平山 邦明 杉崎 範英 加藤 えみか 金久 博昭 福永 哲夫 川上 泰雄

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.55, no.1, pp.33-43, 2010 (Released:2010-07-20)

参考文献数

20

被引用文献数

1 1

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The purpose of the present study was to examine the influence of tendon elasticity, muscle strength and muscle activities on the amount of mechanical work enhancement associated with a counter movement. Twenty-one athletes performed a unilateral maximal jump using only the ankle joint with (CMJ) and without (no-CMJ) a counter movement on a sledge apparatus. Mechanical work done by the ankle joint was calculated from the ground reaction force and ankle joint kinematic parameters, and the difference between CMJ and no-CMJ conditions (ΔWork) was determined. During the exercise, electromyographic (EMG) activities were recorded from the triceps surae muscles. The maximal isometric plantar flexion torque and Achilles tendon stiffness were also determined using a torque meter and ultrasonogram. No significant correlation was found between ΔWork and either tendon stiffness or the maximal torque. In addition, neither the difference between CMJ and no-CMJ in iEMG nor mEMG was correlated with ΔWork. On the other hand, ΔWork was significantly correlated with the integrated EMG during the braking phase (r=0.52, p<0.05) and both the integrated (r=0.55, p<0.01) and mean (r=0.53, p<0.05) EMG during the push-off phase of CMJ. These results suggest that individual differences in ΔWork are influenced not by differences in the mechanical properties of the muscle-tendon unit, but by the individuality of muscle activities during CMJ.

著者

大島 雄治 藤井 範久

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.16011, (Released:2017-01-24)

参考文献数

39

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The purpose of this study was (1) to quantify the contribution of the adductors and iliopsoas to the hip joint torque, and (2) to clarify the function of the adductors and iliopsoas for terminal support until early recovery in maximal velocity sprinting. Eight male track and field athletes volunteered for the present study, and sprinted 60 m from a standing start position. Ground reaction force to the right leg was measured using a force platform (1000 Hz) placed at the 50-m mark from the start position. Simultaneously, 3-dimensional coordinates of body landmarks were recorded by a motion capture system (250 Hz) with 20 cameras. The right hip joint torque was calculated using inverse dynamics. To estimate the muscle forces of the right lower limb, we created a musculoskeletal model. The contribution of the muscle forces to the right hip joint force was calculated based on both equations of motion for each segment and equations of constraint conditions for adjacent segments connected by a joint. The main results for terminal support until early recovery were: (1) The adductor muscles generated less torque during hip joint flexion. (2) These muscles were involved in forward acceleration of the leg on the same side. (3) The iliopsoas was involved in the forward swing of the thigh on the same side.  Based on these results, it can be concluded that the hip adductors do not function as hip flexors, but as forward accelerators of the leg on the same side, based on the hip joint adductor torque. In contrast, the iliopsoas does not function as a forward accelerators of the leg on the same side, but delivers forward swing to the thigh on the same side for hip joint flexion torque.