著者

森本 吉謙 伊藤 浩志 島田 一志 川村 卓 阿江 通良 村木 征人

出版者

日本スポーツ方法学会

雑誌

スポーツ方法学研究 (ISSN:09183086)

巻号頁・発行日

vol.16, no.1, pp.13-26, 2003-03

著者

宮西 智久 森本 吉謙

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.4, pp.361-381, 2007 (Released:2007-08-08)

参考文献数

46

被引用文献数

3 3

---

A three-dimensional (3D) videography study was performed to clarify the mechanical effects of a change of pitching motion from an overhand throw (OH style) to a three-quarter throw (TQ style). Two collegiate pitchers (subjects A and B) who normally used the OH style participated. They were requested to change their original OH style into the TQ style. To do this, they were subjected to a one-year skill training program based on biomechanical principles and on knowledge such as the stretch-shortening cycle theory, muscle force-velocity relationship, and the motions of skilled pitchers (e.g., shoulder positioning at 90 degrees of abduction-adduction during the acceleration phase). Four pitches for subject A (two in pre-training, one during training and one in post-training), and three for subject B (one each in pre-training, training and post-training) were videotaped with the 3D DLT procedure using two high-speed cameras, and then analyzed. We then examined the mechanical differences between pre- and post-training. The speed of the ball at release increased progressively with every successive pitch for both subjects (Subject A : 1st : 130.3km/h ; 2nd : 133.2km/h ; 3rd : 135.7km/h ; 4th : 142.2km/h. Subject B : 1st : 131.0km/h ; 2nd : 135.0km/h ; 3rd : 139.3km/h). The pitching styles of both subjects changed from their original OH style to the TQ style, both qualitatively and quantitatively. The time-dependent patterns and peak values of the angular velocities of shoulder internal-external rotation and elbow flexion-extension of the throwing arm did not change very much. However, the peak value of the angular velocity of shoulder internal rotation occurred immediately after ball release for the OH style, while for the TQ style it occurred at ball release. As a result, the angular velocity of elbow extension at ball release was larger in the OH style than in the TQ style. On the other hand, the angular velocity of shoulder internal rotation at ball release was larger in the TQ style than in the OH style. These findings suggest that the increase in the speed of the ball is dominated by elbow extension in the OH style, and by shoulder internal rotation in the TQ style.

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

---

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

川村 卓 島田 一志 高橋 佳三 森本 吉謙 小池 関也 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

pp.0812080087, (Released:2008-12-10)

参考文献数

20

被引用文献数

25 4

---

The purpose of this study was to analyze three-dimensionally two groups of baseball strikers, i.e. high and low swing speed groups, and to compare the kinematics of their upper limb motion. Sixteen skilled male strikers were videotaped with two synchronized high-speed video cameras operating at 200 Hz. One trial in which the maximum bat head speed was achieved was selected for each subject and digitized to obtain three-dimensional coordinates of the segment end-points and the bat using a DLT technique. Subjects were divided into High (n=8) and Low (n=8) groups according to the bat head speed. The angles compared between the two groups were abduction-adduction, horizontal abduction-adduction, flexion-extension and internal-external rotation for both shoulders, flexion-extension for both elbows, supination-pronation for both forearms, radius-ulnar flexion, and dorsi-palmar flexion for both hands. The sequential data were normalized with the time from the point when the speed of the grip was over 3 m/s to the ball impact, and then averaged.

著者

宮西 智久 森本 吉謙

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.52, no.4, pp.361-381, 2007

被引用文献数

1 3

---

A three-dimensional (3D) videography study was performed to clarify the mechanical effects of a change of pitching motion from an overhand throw (OH style) to a three-quarter throw (TQ style). Two collegiate pitchers (subjects A and B) who normally used the OH style participated. They were requested to change their original OH style into the TQ style. To do this, they were subjected to a one-year skill training program based on biomechanical principles and on knowledge such as the stretch-shortening cycle theory, muscle force-velocity relationship, and the motions of skilled pitchers (e.g., shoulder positioning at 90 degrees of abduction-adduction during the acceleration phase). Four pitches for subject A (two in pre-training, one during training and one in post-training), and three for subject B (one each in pre-training, training and post-training) were videotaped with the 3D DLT procedure using two high-speed cameras, and then analyzed. We then examined the mechanical differences between pre- and post-training. The speed of the ball at release increased progressively with every successive pitch for both subjects (Subject A : 1<SUP>st</SUP> : 130.3km/h ; 2<SUP>nd</SUP> : 133.2km/h ; 3<SUP>rd</SUP> : 135.7km/h ; 4<SUP>th</SUP> : 142.2km/h. Subject B : 1<SUP>st</SUP> : 131.0km/h ; 2<SUP>nd</SUP> : 135.0km/h ; 3<SUP>rd</SUP> : 139.3km/h). The pitching styles of both subjects changed from their original OH style to the TQ style, both qualitatively and quantitatively. The time-dependent patterns and peak values of the angular velocities of shoulder internal-external rotation and elbow flexion-extension of the throwing arm did not change very much. However, the peak value of the angular velocity of shoulder internal rotation occurred immediately after ball release for the OH style, while for the TQ style it occurred at ball release. As a result, the angular velocity of elbow extension at ball release was larger in the OH style than in the TQ style. On the other hand, the angular velocity of shoulder internal rotation at ball release was larger in the TQ style than in the OH style. These findings suggest that the increase in the speed of the ball is dominated by elbow extension in the OH style, and by shoulder internal rotation in the TQ style.

著者

森本 吉謙 村木 征人

出版者

社団法人日本体育学会

雑誌

日本体育学会大会号

巻号頁・発行日

no.50, 1999-09-15

著者

森本 吉謙 伊藤 浩志 島田 一志 川村 卓 阿江 通良 村木 征人

出版者

日本コーチング学会

雑誌

コーチング学研究 (ISSN:21851646)

巻号頁・発行日

vol.16, no.1, pp.13-26, 2003-03-31 (Released:2021-03-31)

著者

川村 卓 島田 一志 高橋 佳三 森本 吉謙 小池 関也 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.53, no.2, pp.423-438, 2008-12-10 (Released:2009-02-25)

参考文献数

20

被引用文献数

25 4

---

The purpose of this study was to analyze three-dimensionally two groups of baseball strikers, i.e. high and low swing speed groups, and to compare the kinematics of their upper limb motion. Sixteen skilled male strikers were videotaped with two synchronized high-speed video cameras operating at 200 Hz. One trial in which the maximum bat head speed was achieved was selected for each subject and digitized to obtain three-dimensional coordinates of the segment end-points and the bat using a DLT technique. Subjects were divided into High (n=8) and Low (n=8) groups according to the bat head speed. The angles compared between the two groups were abduction-adduction, horizontal abduction-adduction, flexion-extension and internal-external rotation for both shoulders, flexion-extension for both elbows, supination-pronation for both forearms, radius-ulnar flexion, and dorsi-palmar flexion for both hands. The sequential data were normalized with the time from the point when the speed of the grip was over 3 m/s to the ball impact, and then averaged.1 Angles of elbow extension, forearm supination of the top arm, and ulnar flexion of both hands were much changed. However, the angles of both shoulder joints, bottom elbow and bottom forearm showed little change.2. The High group showed significantly larger shoulder adduction and horizontal adduction of a bottom arm than the Low group in 0–10% time and 50–70% time (p<0.05). The High group showed significantly smaller top elbow extension than the Low group in 40–70% time and 90–100% time (p<0.05).3. The High group showed significantly smaller top hand supination than the Low group in 100% time. In the time, the High group showed significantly larger bottom forearm pronation than the Low group in 50–70% time (p<0.05). The High group showed significantly larger dorsiflexion of the bottom hand than the Low group in 20–30% time (p<0.05).

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

---

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.

著者

伊藤 浩志 村木 征人 森本 吉謙 杉林 孝法

出版者

一般社団法人 日本体育学会

雑誌

日本体育学会大会号 第54回(2003) (ISSN:24330183)

巻号頁・発行日

pp.541, 2003-08-26 (Released:2017-08-25)

著者

入澤 裕樹 川村 卓 岡出 美則 森本 吉謙

出版者

一般社団法人 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

vol.59, 2008