著者

小野寺 和也 白坂 牧人 森本 吉謙 入澤 裕樹

出版者

仙台大学

雑誌

仙台大学紀要 = Bulletin of Sendai University (ISSN:03893073)

巻号頁・発行日

vol.52, no.2, pp.1-5, 2021-03-31

著者

小倉 圭 川村 卓 金堀 哲也 野本 尭希 八木 快 小野寺 和也

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.2, pp.511-522, 2017 (Released:2017-12-19)

参考文献数

25

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The purpose of this study was to clarify the types of step adjustment performed by baseball infielders for catching a grounder in relation to skill level. The subjects were 18 amateur baseball infielders, whose fielding motions were videotaped using 2 high-speed video cameras (300 Hz). The 3-dimensional coordinates of both the toes and the ball were obtained using the DLT method. The top 9 subjects who showed small variations in the grounding point of both feet when adopting the catching posture were defined as a high-performance group, and the bottom 9 subjects were defined as an intermediate-performance group. The results obtained were as follows:  1) Baseball infielders modified each grounding point from 4 steps to 1 step before catching in order to acquire the most appropriate catching point, and the final step was highly reproducible.  2) The high-performance group showed a significantly smaller standard deviation in the 1 step before the grounding point than the intermediate-performance group.  3) In the high-performance group, there was a positive correlation between the standard deviation of step length 1 step before and the standard deviation of the grounding point from 5 steps to 2 steps before.  These results suggest it is important to reduce variations in the grounding point 1 step before by earlier perception of the error in the front-to-rear direction of the grounding point. These results could provide important insight for coaches or trainers attempting to improve the performance of infielders when catching a grounder.

著者

小野寺 和也 森本 吉謙 入澤 裕樹 吉村 広樹

出版者

日本スポーツ産業学会

雑誌

スポーツ産業学研究 (ISSN:13430688)

巻号頁・発行日

vol.33, no.1, pp.1_49-1_54, 2023-01-01 (Released:2023-01-23)

参考文献数

10

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The purpose of this study was to compare the time from first base to second base between bent-leg sliding run and run-through run. The subjects were 11 uninjured college baseball players. Running time from first base to second base and 10 m passing time were measured. There were no significant differences in either the time to pass 10 m or the time to reach second base for each running method. The results of this study suggest that neither method of base running from first to second base produced faster results and therefore both methods can be accepted.

著者

小野寺 和也 森本 吉謙 入澤 裕樹 波戸 謙太

出版者

Japan Society of Sports Industry

雑誌

スポーツ産業学研究 (ISSN:13430688)

巻号頁・発行日

vol.30, no.3, pp.3_325-3_329, 2020 (Released:2020-07-24)

参考文献数

11

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In recent years, various measuring instruments have been introduced in baseball fields, and various kinds of objective data can be collected immediately. However, the method of utilizing the data in the coaching field is still being searched for. In order to utilize objective data in the baseball coaching scene, it is necessary to examine the relations between various subjective aspects of players and coaches and the objective data. The purpose of this study was to examine the relationship between the feeling of swinging a bat and swing speed, and to obtain a reference for coaching practice and future research. The subjects were five fielders belonging to the X Baseball Team. Subjective evaluation was performed using VAS on the feeling of swinging the bat during 20-23 days of practice. At the same time, the swing speed was measured. The correlation between the subjective evaluation of the feeling of swinging the bat and the swing speed was verified. As a result, no significant correlation was observed in all five subjects. It was suggested that there was no relationship between the feeling of swinging the bat and the swing speed.

著者

森本 吉謙 入澤 裕樹 坪井 俊樹 小野寺 和也 川村 卓

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.203-210, 2019-03-20 (Released:2019-09-02)

参考文献数

23

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The purposes of this study were to investigate the relationship between competitive result and environmental factors in high school baseball. A questionnaire survey was conducted on 533 university students who belonged to the baseball club when they were in high school. The survey content was the following 11 items; 1. Highest competitive result, 2. Presence or absence of the sports recommendation entrance examination, 3. Presence or absence of the sports scholarship system, 4. Occupation of the head coach, 5. Presence or absence of the assistant coach, 6. Number of the assistant coach, 7. Occupation of the assistant coach, 8. Presence or absence of the selection system for enter the club, 9. Number of the members, 10. Type of school (public or private), 11. Presence or absence of the private facility. In case of high school duplication, only one answer was adopted, and other inappropriate invalid answers were excluded for totalization. Finally, 435 students were divided into national group (n=89), block group (n=82) and prefecture group (n=264), based on the best result of the team at the time of high school, and examined the relationship between the competitive result and each environmental factor. As a result, regarding the occupation of the head coach, the proportion of teachers in all groups was high, but in the other items, the relationship with the competitive result was indicated, and the possibility that the difference in these environments could affect the competitive result was shown.