著者

伊藤 章 市川 博啓 斉藤 昌久 佐川 和則 伊藤 道郎 小林 寛道

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.43, no.5-6, pp.260-273, 1998-11-10 (Released:2017-09-27)

被引用文献数

18

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The present study was designed to investigate the kinematic factors related to sprint running velocity. The subjects were 71 sprinters(49 males and 22 females)who ranged from world class to collegiate level. Movements were recorded around the 60-m point from the start line during a 100-m race(during official races including world championships in athletics, or under experimental conditions)using 16-mm movie or video cameras. The official best time during recording of the movements was 9.86. The correlation coefficients between kinematic data(see Fig.1)and sprint running velocity were calculated for three groups(male, female, and all sprinters). Step length and step length index(step length/body height to exclude the effects of body height)were correlated positively and significantly with sprint running velocity for all groups(male, female, and all sprinter). Step frequency and step frequency index[step frequency・(body height/gravitational acceleration)^<1/2>to exclude the effects of body height]were correlated positively and significantly with sprint running velocity for all groups except male sprinters with regard to step frequency. With regard to leg swing, maximal thigh angle and maximal leg angle showed no significant correlation with sprint running velocity, but the minimal knee angle showed a singificant negative correlation with sprint running velocity for both male and all sprinters. These results suggest that the purpose of high knee drills generally carried out during training needs to be reconsidered. The maximal leg touch down velocity showed a significant positive correlation with sprint running velocity for both female and all sprinters. This probably means that the leg touch down velocity acts to reduce the deceleration at the moment of foot contact and to accelerate the subsequent leg swing back velocity during the foot contact phase. As for the support leg, the maximal leg swing velocity showed a significant positive correlation with sprint running velocity for all groups. Although the maximal hip extension velocity during the foot contact phase was correlated positively and significantly with sprint running velocity for male sprinters, the maximal knee and ankle extension velocity showed a significant negative correlation with sprint running velocity for female and all sprinters. These results suggest that the knee should not be extended to transfer the hip extension velocity effectively to the leg swing velocity during the foot contact period. This was borne out by the fact that the top sprinters entered in the present study hardly extended the knee of the driving leg during the foot contact phase.

著者

伊藤 章 市川 博啓 斉藤 昌久 佐川 和則 伊藤 道郎 小林 寛道

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.43, no.5, pp.260-273, 1998-11-10

被引用文献数

6

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The present study was designed to investigate the kinematic factors related to sprint running velocity. The subjects were 71 sprinters(49 males and 22 females)who ranged from world class to collegiate level. Movements were recorded around the 60-m point from the start line during a 100-m race(during official races including world championships in athletics, or under experimental conditions)using 16-mm movie or video cameras. The official best time during recording of the movements was 9.86. The correlation coefficients between kinematic data(see Fig.1)and sprint running velocity were calculated for three groups(male, female, and all sprinters). Step length and step length index(step length/body height to exclude the effects of body height)were correlated positively and significantly with sprint running velocity for all groups(male, female, and all sprinter). Step frequency and step frequency index[step frequency・(body height/gravitational acceleration)^<1/2>to exclude the effects of body height]were correlated positively and significantly with sprint running velocity for all groups except male sprinters with regard to step frequency. With regard to leg swing, maximal thigh angle and maximal leg angle showed no significant correlation with sprint running velocity, but the minimal knee angle showed a singificant negative correlation with sprint running velocity for both male and all sprinters. These results suggest that the purpose of high knee drills generally carried out during training needs to be reconsidered. The maximal leg touch down velocity showed a significant positive correlation with sprint running velocity for both female and all sprinters. This probably means that the leg touch down velocity acts to reduce the deceleration at the moment of foot contact and to accelerate the subsequent leg swing back velocity during the foot contact phase. As for the support leg, the maximal leg swing velocity showed a significant positive correlation with sprint running velocity for all groups. Although the maximal hip extension velocity during the foot contact phase was correlated positively and significantly with sprint running velocity for male sprinters, the maximal knee and ankle extension velocity showed a significant negative correlation with sprint running velocity for female and all sprinters. These results suggest that the knee should not be extended to transfer the hip extension velocity effectively to the leg swing velocity during the foot contact period. This was borne out by the fact that the top sprinters entered in the present study hardly extended the knee of the driving leg during the foot contact phase.

著者

斉藤 昌久 伊藤 章 佐川 和則

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.43, 1992-10-31

著者

室伏 重信 斉藤 昌久 湯浅 景元

出版者

中京大学

雑誌

中京体育学研究 (ISSN:02870088)

巻号頁・発行日

vol.23, no.1, pp.38-43, 1982-04-01

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The speed, height and angle at which the hammer was released were measured and phasic analysis was performed in this study. Two hammer throwers were selected as subjects. One of them (Subject Mur) had the Japan national record, 71.72 m, in 1981. In this experiment, the records were 70.84 and 52.82 m for subjects Mur and Hos, respectively. Higher values for speed and angle of release were observed in subject Mur. The height of hammer head at release, however, was lower in subject Mur. Duration of delivery phase was longer in this subject. Angular velocity of hammer head was higher in the one foot supporting phase than in two feet supporting phase in higher subject. On the contrary, angular velocity of left wrist was higher in two feet supporting phase in this subject. In subject Hos, however, no significant differences of both angular velocities of hammer head and left wrist were obtained in between one foot and two feet supporting phases.

著者

佐川 和則 伊藤 章 伊藤 道郎 斉藤 昌久 加藤 謙一

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.46, 1995-09-10

著者

伊藤 章 斉藤 昌久 淵本 隆文

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

vol.42, no.2, pp.71-83, 1997-07-10 (Released:2017-09-27)

被引用文献数

1 5

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A study was performed to compare joint torque development with EMG activities, and to investigate the relationship between peak torque and power during different phases of leg movement at different sprint velocities from the starting dash to full stride. Cinematographic recordings of sprint movement together with ground reaction forces and EMGs from seven lower limb muscles were obtained from four male sprinters at the 1st, 3rd, 5th, 9th, 13th and 19th (maximal velocity) steps from the sprint start. Joint torque and power in the hip, knee and ankle were computed from analysis of the film and ground reaction forces. The results can be summarized as follows: 1) The developmental patterns of joint torque and power, and the EMG activities were similar from the first step to the maximal velocity. 2) The phases of torque development were parallel to the related EMG activities. 3) Stretch-shortening cycles of muscle were observed in the m. Soleus during the foot contact period and in the m. Biceps femoris during the latter half of the swing period. 4) There was no peak torque or power that showed a decrease with increased sprint velocity. 5) Peak torque and power that increased with sprint velocity were (a) torque and positive power of the hip flexors during the first half of the swing period, (b) torque of the hip extensors during the latter half of the swing period, (c) torque and negative power of the knee extensors during the first half and latter half of the swing period, (d) torque of the ankle extensors during the middle of the foot contact period, (e) negative power of the ankle extensors during the first half of the foot contact period, and (f) positive power during the latter half of the foot contact period. These results suggest that muscles in the hip and knee joints cooperate with the change in swing movement, and that muscles in the ankle joint cooperate with the change in drive movement as sprint velocity increases. 6) The peak torque and power that remained high independent of sprint velocity were (a) torque and positive power of the hip extensors from the middle of the swing period to the middle of the foot contact period, (b) torque of the ankle extensors during the foot contact period, and (c) power of the ankle extensors during the latter half of the foot contact period. These results indicate the importance of the hip extensors and ankle extensors in sprinting.

著者

佐川 和則 伊藤 章 斉藤 昌久 加藤 謙一

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.43, 1992-10-31

著者

斉藤 昌久

出版者

日本体力医学会

雑誌

体力科學 (ISSN:0039906X)

巻号頁・発行日

vol.42, no.6, 1993-12-01

被引用文献数

1