著者

西村 典子 中村 豊 恩田 哲也 伊藤 栄治

出版者

東海大学

雑誌

東海大学スポーツ医科学雑誌 (ISSN:09153659)

巻号頁・発行日

vol.18, pp.100-106, 2006-03-31

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The purpose of this study is to report the factors of circulatory disturbances in the fingers of baseball players and the symptoms of those and to investigate the incidences by the administration of a questionnaire. The respondents were 804 players belonging to clubs in junior high school, high school, and universities. According to questionnaires, 202 players (25.1%) were aware of circulatory disturbances in their fingers, and there were most replies having circulatory disturbances in the catching hand with index finger. Especially players of a position with much catching balls frequency, such as a catcher and a first baseman, seem to have the high rate of having circulatory disturbances from repetitive ball impact. No relation to their positions, the appearances of circulatory disturbances in the fingers was remarkably increased from 4 to 7 years from beginning baseball that suggested this period would be needed the device and the measure of practice method for prevent or relief from repetitive ball impact. The various factors seem to be relative causing the appearances of circulatory disturbances in the fingers, such as years of experience playing baseball, their position, their using globes or mitts, temperature, ground condition, smoking custom and so on.

著者

寺尾 保 恩田 哲也 有賀 誠司

出版者

東海大学

雑誌

東海大学スポーツ医科学雑誌 (ISSN:09153659)

巻号頁・発行日

vol.12, pp.19-27, 2000

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The purpose of this study is to elucidate the energy metabolism in a simulation of the fifth section of the Hakone Ekiden(disrance of 20.7km)using a runner-motion-response-type treadmill in a laboratory. Five male runners aged 20.2±.6 years were asked to run at their desired speds on a programmable treadmill whose"slope-setting"was changed automatically every fifty meters. The runners watched a video of the acrual course during this experiment. We found a significant correlation between the slope every fifty meters and the mean step length(r=-0.695)and step frequency(r=0.646). The mean values of oxygen uptake and respiratory exchange ratio of the five runners were 59.83±5.42(range 56.35-62.55)ml/kg/min and 0.99±0.05(range 0.97-1.01), respectively. The total energy expenditure and energy expenditure deduced from carbohydrates and lipids in this fifth section were 1632±58 kcal, 1502±120 kcal, and 130±96 kcal, respectively. In the case of an upward slope, we observed a significant correlation between energy expenditure(kcal/kg)for the five runners and mean step length(r=-0.942), mean step frequency(r=0.918), and running time(r=0.982). These results indicate that about 90% of the total energy used in the fifth section is supplied by the carbohydrate component and showed the high intersity of exercise during this section. In conclusion, our results for the upward slope showed that good long-distance runners use a longer step length, and thereby save energy and thus realize an improved running economy.

著者

内藤 堅志 恩田 哲也 岡本 武志 山本 正彦 越野 忠則 青木 玲

出版者

日本スキー学会

雑誌

スキー研究 (ISSN:1349449X)

巻号頁・発行日

vol.19, no.1, pp.17-23, 2023 (Released:2023-04-18)

参考文献数

29

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Standard advice for beginner and intermediate snowboarders is to place your weight on the front foot when following the fall line or traversing the slope. This stance is considered best for beginner or intermediate snowboarders who are learning how to shift their center of gravity to the front of the board to turn the nose toward the fall line[ called‘nosedrop’in Japanese] or to rotate the board when traversing the slope. The purpose of this study is to determine whether this is also the best stance for advanced snowboarders. Our research suggests that when snowboarders make a carving turn, excessive pressure on the forefoot may make it difficult to perform an ideal turn as the tip of the board may cut into the snow surface more than necessary and create more resistance than necessary. In this study, we measured the pressure distribution and center of pressure( COP) applied to the soles of both feet when the vertical movement was performed while standing straight or leaning forward with respect to the slope. The results showed that the pressure distribution of the forefoot decreased when all subjects moved vertically. In addition, when all subjects moved vertically, the COP moved nearer the center of the stance. The results suggest that it is possible to perform carving turns with less deceleration by standing up vertically, and as a result preventing the tip of the board from digging into the snow surface more than necessary and consequently receiving more resistance from the snow surface than necessary.

著者

恩田 哲也 吉原 さちえ 山本 正彦 内藤 堅志

出版者

日本スポーツマネジメント学会

雑誌

スポーツマネジメント研究 (ISSN:18840094)

巻号頁・発行日

pp.2023-002, (Released:2023-01-20)

参考文献数

41

著者

宮崎 誠司 佐藤 宣践 橋本 敏明 白瀬 英春 山下 泰裕 中西 英敏 上水 研一朗 恩田 哲也 中村 豊

出版者

東海大学

雑誌

東海大学紀要. 体育学部 (ISSN:03892026)

巻号頁・発行日

vol.37, pp.91-95, 2007

被引用文献数

1

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A clinical evaluation using lysholm score was done about micro current electric stimulation (MENS) to the sports injury. The reduction of the pain was seen at the early stage of medial collateral ligament injury of the knee. The motor function was improved at the early stage, compared with the group that doesn't enforce MENS. In 56 days after injury, we evaluate by Lysholm score. In using MENS eight all examples were excellent (mean 97.9), on the other hand, without using MENS excellent was only one example in ten(mean93.0). The effect of MENS was thought to be the one by the injury current. There is a possibility of taking part in the electron transport system for the ATP synthesis.

著者

西村 典子 伊藤 栄治 恩田 哲也 中村 豊

出版者

東海大学

雑誌

東海大学紀要. 体育学部 (ISSN:03892026)

巻号頁・発行日

vol.36, pp.185-190, 2006

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The purpose of this study is to report "the circulatory disturbances in the fingers of baseball players", and to analyze those of the tendency and the rate of incidences as each area by the administration of a questionnaire. It also researches the influences of external environments of the position, the practice, and the temperature and so on. The questionnaires were conducted on 274 players belong to the baseball club of 6 high school attached to Tokai University. According to questionnaires, 76 players (27.7%) were aware of circulatory disturbances in their fingers. The circulatory disturbances in the fingers is caused by the hyperextension of the throwing fingers as the repetition of throwing performance and the mechanical stress of catching the ball as the repetition of catching performance. As a characteristic of positions, the catchers and the infielders tend to be aware a tingling and numbness in their catching index fingers, the pitchers throw with index and middle fingers. The various factors such as their position, practice time, teaching technique seem to be relative causing the appearances of circulatory disturbances in the fingers, but air temperature didn't seem to be related.

著者

中村 豊 岩垣 丞恒 寺尾 保 有賀 誠司 恩田 哲也

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.46, no.6, 1997-12-01

被引用文献数

1

著者

西村 典子 中村 豊 恩田 哲也 伊藤 栄治 甲斐 堯介

出版者

東海大学

雑誌

東海大学スポーツ医科学雑誌 (ISSN:09153659)

巻号頁・発行日

vol.19, pp.63-68, 2007

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The purpose of this study is to investigate the effect of artificial carbon dioxide-rich water for peripheral circulatory improvement on fingers of baseball players with circulatory disturbances catching hands with index fingers suffering from repetitive ball impact. A trial therapy of bathing in artificial carbon dioxide-rich water and fresh water for following the nine university baseball players having symptoms of circulatory disturbances graphic evaluation of thermograph and analysis of temperature on fixed point was done. Results suggest circulatory improvement of fingers : two players of the artificial carbon dioxide-rich water tended toward increased temperature on their catching hands, indicating improved blood flow in the index finger and center-point of the palm area. The measurement conditions were not always ideal because there were some variance in this trial therapy, for example environmental temperatures, degrees of circulatory disturbances, problem progress of bathing and so on ; nevertheless treatments for circulatory disturbances in the fingers under the condition of low temperature don't currently exist. The therapy of bathing in artificial carbon dioxide-rich water seems to be useful on the sports field.

著者

寺尾 保 恩田 哲也 岩垣 丞恒

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.48, no.6, 1999-12-01

著者

有賀 誠司 寺尾 保 恩田 哲也

出版者

東海大学

雑誌

東海大学スポーツ医科学雑誌 (ISSN:09153659)

巻号頁・発行日

vol.13, pp.24-33, 2001

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The purpose of the present study was to determine the effects of a resistance training program in triathletes. Eight healthy university competitive men's triatheletes who had no experience of the resistance training were assigned to either the resistance training group(TRAINING : N=4)or the regular training group(CONTROL : N=4). The resistance training program that Johnston et al.(1995)used for women long-distance runners was carried out three times a week, for ten weeks in TRAINING. Body weight, body fat, muscle cross-sectional area of thigh, squat 1RM, leg press power, isokinetic strength, and the incremental exercise using treadmill were examined before and after the training. At the same time, VO_2max and blood lactate concentration were also measured. The main results were as follows; 1) In regard to body weight, body fat, and muscle cross-sectional area of the thigh, no significant changes were found in either the TRAINING a CONTROL groups. 2) In the case of squat 1RM and leg press power, a significant increase was noted in the TRAINING group (p<0.01,p<0.05). There were no significant changes in isokinetic strength for either the TRAINING or CONTROL group. 3) There was no significant changes in VO_2max/BW in either groups. However, there was a significant increase in blood lactate concentration in the TRAINING group (p<0.05). 4) There was a positive correlation between the percentage change in leg press power/squat 1RM and in blood lactate concentration (p<0.05)in both groups. From these results we suggest that the resistance training program in triathletes was useful to improve the muscle strength and power without muscle hypertrophy, and to enhance during endurance high intensity exercise.