- 著者
- 藤田 英二 竹中 健太郎 下川 美佳 與谷 謙吾 小澤 雄二 中村 勇 小崎 亮輔 前阪 茂樹
- 出版者
- 日本武道学会
- 雑誌
- 武道学研究 (ISSN:02879700)
- 巻号頁・発行日
- vol.56, no.1, pp.19-27, 2023 (Released:2023-11-14)
- 参考文献数
- 26
This study investigated the effects of full-force bicycle pedaling exercise on deep body temperature and exerted power while wearing kendo-gu with a mask and face shield in a hot and humid environment. The subjects were eight male university kendo athletes. All subjects wore kendo-gi and kendo-gu but the experiments were conducted under two conditions: one with the subjects wearing a mask and face shield and the other without a mask and face shield. The experiments were conducted in a climate chamber with the WBGT (wet bulb globe temperature) set at 28. Intermittent, full-force pedaling exercises using a bicycle ergometer with a 15-minute rest period in between exercises. Changes in core body temperature during rest and the rate of decrease in exerted power during the two full-force pedaling exercises were examined. The results showed that wearing a mask and face shield caused an increase in deep body temperature during the resting period between exercises, and a decrease in exerted power during the post-rest exercise. These results suggest that wearing masks and face shields in a hot and humid environment in kendo training may increase the risk of heat stroke and affects the quality of training.
- 著者
- 小澤 雄二 小崎 亮輔 藤田 英二
- 出版者
- 日本スポーツパフォーマンス学会
- 雑誌
- スポーツパフォーマンス研究 (ISSN:21871787)
- 巻号頁・発行日
- vol.14, pp.158-163, 2022-07-21 (Released:2022-07-28)
- 参考文献数
- 15
本研究では,柔道選手が「積極的に前に出て相手を押し込んで試合を展開することの利点」と「握力発揮の影響」を明らかにするために,重心位置の相違や,握力発揮の有無を設定した条件下における単純全身反応時間を検証し,柔道のコーチングに活かすことを目的とした.結果は,以下に示すとおりである. 1.単純全身反応時間は,握力発揮の有無に関わらず,重心位置が前方,自然体,後方の順に速かった. 2.単純全身反応時間は,重心位置に関わらず,握力発揮なし時に比べ,握力発揮あり時には遅延した. 以上のことから,試合において積極的に前に出て相手を押し込むことや,組み手の工夫によって柔道衣の握り方に強弱を付けることは,より素早い反応による素早い技出しや防御動作が期待できるという点において,有利に試合を進めるための戦術となり得るものと考えられる.
1 0 0 0 OA 小学校高学年の立位姿勢とその特徴
- 著者
- 井福 裕俊 中山 貴文 坂本 将基 齋藤 和也 小澤 雄二 福田 晃平 中村 朱里
- 出版者
- 熊本大学
- 雑誌
- 熊本大学教育学部紀要 (ISSN:21881871)
- 巻号頁・発行日
- vol.66, pp.267-272, 2017-12-19
The purpose of the present study was to classify standing posture of the upper grade elementary school children in the second sexual stage into five types according to Kendall's method, and to clarify factors affecting those postures by using seven muscle strength or flexibility tests. A total of 196 children (104 boys, 92 girls) were analyzed. Only 22% of children were a good posture even if the ideal and military postures were combined, whereas a bad posture, i.e., kyphosis-lordosis, flat-back and sway-back postures, accounted for 78%. The deviation of the body's center of gravity was significantly shorter in the good pasture than in the bad posture. When principal component analysis was applied to the data for seven muscular strength or flexibility tests, military posture had high overall evaluation of muscular strength and flexibility and kyphosis-lordosis posture was lower, whereas ideal posture was mainly held by muscular strength and flexibility of lower body and flat-back posture was mainly held by those of upper body. These findings suggest that it is necessary to improve muscle strength and flexibility in order to improve the bad standing posture of upper grade elementary school children.