Nippon Sport Science University
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Risky play and social behaviors among Japanese preschoolers : direct observation method
Get PDF掲載誌：Natsuko, I., Akiko, S., Tetsuhiro K. and Shingo N. (2022). Risky Play and Social Behaviors among Japanese Preschoolers: Direct Observation Method, Environmental Research and Public Health, 19(13): 7889–7889.研究紹介：国外学術誌掲載論文からdepartmental bulletin pape
Kinematic characteristics of the first service motion for male and female soft tennis players its gender differences
Get PDFThis study aimed to investigate kinematic characteristics of the first service motion for soft tennis players, focusing on gender difference. Sixteen male and eleven female soft tennis players were asked to perform overhand first service with full effort. A target area (1 m×1 m) was set in the center of the opponent’s service area on the indoor tennis court. Twelve motion capture cameras operating at 250 Hz were used to collect three dimensional of 47 points on the body and 5 points on the racket to calculate joint kinematic variables. Ball and racket head speeds for male players were significantly greater than that of female players. The angular velocities of the shoulder joint internal rotation of the racket side and knee joint ex-tension were significantly greater in male players than those of female players.
On the other hand, the upper torso trunk torsion and its angular velocity were significantly greater in female players. These results indicated that some kinematics factors of in the upper and lower limbs were important for obtaining high racket head speed, as the previous studies pointed out, and implied that these might be a mechanics in the trunk rotation which would be peculiar to female players and different from male players.本研究では，ソフトテニス選手におけるファーストサービスのキネマティクス的特徴について性差に着目して明らかにすることを目的とした．男子16名および女子11名のソフトテニス選手を対象とし，相手側のサービスエリア中央にターゲットエリア（1 m×1 m）を設けたテニスコートにおいて，オーバーハンドサービスによるファーストサービスを全力で打たせる試技を実施した．モーションキャプチャーカメラ（250 Hz）を12台用いて，身体47点およびラケット5点の3次元の座標データを収集し，キネマティクス変数を算出した．その結果，男子のボールスピードおよびラケットヘッドスピードは女子より有意に大きかった．また，ラケット所持腕の肩関節内旋や膝関節の伸展角速度も男子が女子より有意に大きかった．一方で，体幹捻転や上胴の角速度は女子が男子よりも有意に大きかった．これらの結果から，高いラケットヘッドスピードを得るためには上肢と下肢のキネマティクスが重要であり，女子は男子と異なる特有の体幹回転のメカニズムがあることが示唆された．原著論文departmental bulletin pape
A biomechanical study on the bicycle pedaling skill
Get PDF日本体育大学Nippon Sport Science University博士（体育科学）Doctor of Philosophy in Physical Education, Health and Sport Sciencedoctoral thesi
The relationship between pedal force application technique and the ability to perform supramaximal pedaling cadences
Get PDF掲載誌：Yamaguchi, Y., Otsuka, M., Watanabe, K., Wada, N. and Nishiyama, T. (2022). The relationship between pedal force application technique and the ability to perform supramaximal pedaling cadences, Frontiers in Sports and Active Living, 4.研究紹介：国外学術誌掲載論文からdepartmental bulletin pape
Go/no-go task performance of Japanese children: Differences by sex, grade, and lifestyle habits
Get PDF掲載誌：Akiko Shikano and Shingo Noi (2022). Go/no-go task performance of Japanese children: Differences by sex, grade, and lifestyle habits, Frontiers in Public Health, 10.研究紹介：国外学術誌掲載論文からdepartmental bulletin pape
Psychological factor analysis of Asian university baseball player's performance changes in extremely stressful situations during a game : researches on perfectionism and competitive state anxiety that mediately affect game performance
Get PDF日本体育大学Nippon Sport Science University博士（コーチング学）Doctor of Philosophy in Sport Coaching Sciencedoctoral thesi