研究者詳細 - 横山　慶子

論文 - 横山　慶子

分割表示 42 件中 1 - 20 件目／全件表示 >>

Football games consist of a self-smilar sequence of ball-keeping durations 査読有り Open Access

Keiko Yokoyama, Hiroyuki Shima, Akifuumi Kijima, and Yuji Yamamoto

Fractal and Fractual 9 巻 ( 7 ) 頁： 406 2025年6月

集団スポーツのダイナミクス理解と現場への応用招待有り

横山慶子

人工知能 40 巻 ( 1 ) 頁： 1020 - 1025 2025年1月

Interpersonal strategy for controlling unpredictable opponents in soft tennis 査読有り

Yuji Yamamoto, Keiko Yokoyama, Akifumi Kijima, Motoki Okumura, and Hiroyuki Shima

Scientific Reports 14 巻頁： 20546 2024年9月

Interpersonal coordination analysis in bat-and-ball sports under a real game situation: Asymmetric interaction and delayed coupling 査読有り

R. Takamido, K. Yokoyama, H. Nakamoto, J. Ota, Y. Yamamoto

PLoS ONE 18 巻 ( 11 ) 頁： e0290855 2023年11月

自転車競技ポイントレース中の集団動態解析に向けた定量化査読有り

スポーツパフォーマンス研究 15 巻頁： 295 - 306 2023年7月

An examination of the potential benefits of expert guided physical activity for supporting recovery from extreme social withdrawal: Two case reports focused on the treatment of Hikikomori 査読有り国際共著

Keiko Yokoyama, Tadaaki Furuhashi, Yuji Yamamoto, Maki Rooksby, Hamish J. McLeod

Frontiers in Psychiatry 14 巻 ( 1084384 ) 頁： 1 - 14 2023年3月

担当区分：筆頭著者,　責任著者記述言語：英語掲載種別：研究論文（学術雑誌）

Extreme and long-term social withdrawal, first described in Japan as Hikikomori, has now become a globally recognized mental health problem. Intervention studies severely lag behind epidemiological and phenomenological research. We present two descriptive case reports of Japanese university students with Hikikomori who participated in an early phase test of a structured intervention involving physical activities that was developed and facilitated by clinicians and physical education specialists—Human Movement Consultation (HMC). The two male recipients (19 and 29-years old at the start of treatment) completed approximately 40 consultation sessions delivered over three years consisting of a combination of outdoor workouts (i.e. walking, running, and cycling) and interpersonal sports (e.g. table tennis, badminton, and tennis). Changes in social withdrawal behavior were independently rated from clinical health records using a structured scale (the Glasgow Hikikomori Scale; GHS). Behavioral observations and scale data for both cases indicated improvements from pre-treatment levels of social withdrawal. At the end of the intervention, both had returned to normative levels of functioning. Case A returned to university and Case B secured a new job and returned to the workforce. To help advance our understanding of treatment options, these case descriptions analyse potential change mechanisms in order to understand how HMC can support recovery from extreme social withdrawal. One key observation is that both outdoor workouts and interpersonal sports offer a non-threatening method of enabling Hikikomori to engage in interpersonal interactions. Such connections via structured activities may allow the reinstatement of social skills in a graded manner. In addition, an initial focus on physical experiences may help promote psychological and social connectedness without triggering the social fears and challenges that underlie the Hikikomori state. The findings from these two cases offer a framework to guide further research and the development of exercise-based interventions for this hidden and often neglected group.

DOI： https://doi.org/10.3389/fpsyt.2023.1084384

Descriptive Parameters and Its Hysteresis of the Group Separation and Recombination in Bicycle Points Races: Leader's Velocity and Speed Difference between Leader and Main Group 査読有り

Okumura Fumihiro, Yokoyama Keiko, Yamamoto Yuji

APPLIED SCIENCES-BASEL 13 巻 ( 3 ) 頁： 1315 - 1315 2023年2月

The Influence of Shared Intentions With Others in Physical and Cognitive Tasks That Require Collaborative Solving in Elementary School 査読有り

Kano Takahiro, Yokoyama Keiko, Yamamoto Yuji

FRONTIERS IN EDUCATION 7 巻 2022年6月

Hitting movement patterns organized by different pitching movement speeds as advanced kinematic information 査読有り

Ryota Takamido, Keiko Yokoyama, Yuji Yamamoto

Human Movement Science 81 巻 2022年2月

Effect of Manipulating Advanced Kinematic Information on Hitting Movement Prediction, Perception, and Action 査読有り国際誌

Takamido Ryota, Yokoyama Keiko, Yamamoto Yuji

RESEARCH QUARTERLY FOR EXERCISE AND SPORT 92 巻 ( 4 ) 頁： 747 - 759 2021年10月

State transitions among groups of cyclists in cycling points races 査読有り

Fumihiro Okumura and Keiko Yokoyama and Yuji Yamamoto

Published online 巻 2021年3月

How Training Tools Physically Linking Soccer Players Improve Interpersonal Coordination 査読有り国際共著国際誌

Yokoyama Keiko, Tabuchi Noriyuki, Araujo Duarte, Yamamoto Yuji

JOURNAL OF SPORTS SCIENCE AND MEDICINE 19 巻 ( 2 ) 頁： 245 - 255 2020年6月

連携技能に関わる練習道具のトレーニング効果を検証する査読有り

横山慶子, 田渕規之，山本裕二

スポーツパフォーマンス研究 12 巻頁： 193 - 208 2020年4月

集団運動における協調スキルを評価する招待有り

体育の科学 70 巻 ( 3 ) 頁： 203-207 2020年3月

Task constraints and stepping movement of fast-pitch softball hitting 査読有り

Ryota Takamido, Keiko Yokoyama, Yuji Yamamoto

PLoS ONE 14 巻 ( 2 ) 頁： e0212997 2019年2月

記述言語：英語掲載種別：研究論文（学術雑誌）

This study aims to clarify the relationship between task constraints and the preparatory movement of fast-pitch softball batters in Japan for three different competition categories, namely high school, college, and league. As task constraints, we focused on the temporal and tool constraints and evaluated preparatory movements using initiation time and step duration of the stepping movement in a striking action. First, we confirmed the temporal constraints in each category and then examined the relationship between the temporal constraints and the stepping movements. The results demonstrated that the temporal constraints affected both initiation time and step duration of the stepping movements. Hierarchical cluster analysis was applied to the two variables. Consequently, the stepping movement of the softball players was classified into three types: “late initiation–short duration” (LS), “early initiation–short duration” (ES), and “early initiation–long duration” (EL) corresponding to the task constraints. Finally, the relationship between the task constraints of each category and the stepping movements was examined. The results revealed that high school players exhibited mostly the LS- or EL-type stepping movement; college players exhibited mostly the EL-type stepping movement; and league players exhibited all types. These results depict that the players in each category with each temporal and tool constraint exhibited particular types of stepping movements as a preparatory movement corresponding to each task constraint, thereby arguing that players use a not-to-lose strategy exploiting the redundancy in solutions under various task constraints.

DOI： 10.1371/journal.pone.0212997

Web of Science

Scopus

PubMed

A Switching Hybrid Dynamical System: Toward Understanding Complex Interpersonal Behavior 査読有り

Yamamoto Yuji, Kijima Akifumi, Okumura Motoki, Yokoyama Keiko, Gohara Kazutoshi

APPLIED SCIENCES-BASEL 9 巻 ( 1 ) 頁： 1 - 15 2019年1月

Motor control of practice and actual strokes by professional and amateur golfers differ but feature a distance-dependent control strategy 査読有り国際誌

Hasegawa Yumiko, Fujii Keisuke, Miura Akito, Yokoyama Keiko, Yamamoto Yuji

EUROPEAN JOURNAL OF SPORT SCIENCE 19 巻 ( 9 ) 頁： 1204 - 1213 2019年

Social forces for team coordination in ball possession game 査読有り

Keiko Yokoyama, Hiroyuki Shima, Keisuke Fujii, Noriyuki Tabuchi, Yuji Yamamoto

Physical Review E 97 巻 ( 2 ) 2018年2月

担当区分：筆頭著者記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：American Physical Society

Team coordination is a basic human behavioral trait observed in many real-life communities. To promote teamwork, it is important to cultivate social skills that elicit team coordination. In the present work, we consider which social skills are indispensable for individuals performing a ball possession game in soccer. We develop a simple social force model that describes the synchronized motion of offensive players. Comparing the simulation results with experimental observations, we uncovered that the cooperative social force, a measure of perception skill, has the most important role in reproducing the harmonized collective motion of experienced players in the task. We further developed an experimental tool that facilitates real players' perceptions of interpersonal distance, revealing that the tool improves novice players' motions as if the cooperative social force were imposed.

DOI： 10.1103/PhysRevE.97.022410

Web of Science

Scopus

集団スポーツにおける協調と共感（Coordination and sympathy in collective sports）

横山慶子

日本体育学会大会予稿集 69 巻 ( 0 ) 頁： 37_1 - 37_1 2018年

記述言語：日本語出版者・発行元：一般社団法人日本体育学会

<p>　集団スポーツでは、チーム内のプレイヤー間の協調した動きが必要とされる。協調が上手く機能すれば、個人の能力の総和以上の結果が、チームとして発揮される場合があるが、上手く機能しなければその逆も有り得る。プレイヤーは、複数の他者のコート上での位置や動きを敏感に察知して他者の意図に共感し、状況に応じて最適な動きを実行しなければならない。熟練したチームの華麗なパスワークなどをみると、まるで彼らは見えない糸で繋がったひとつの生命体のようである。我々は、こうした洗練されたチームの協調を実現するためには、個人のプレイヤーがどのような情報を察知して動く必要があるのかを検証するために、社会行動の数理モデル（Social force model）に注目した。このモデルは、混雑した人混みにおいて、歩行者が他者や障害物との衝突を回避する際に働く「見えない力」を定式化したもので、群集の避難行動のシミュレーションなどに応用されている。本シンポジウムでは、この数理モデルを援用して、サッカーの3対1課題を行う3者の協調した動きを3種類の「見えない力」で再現した結果を紹介し、集団スポーツにおける協調と共感について考えてみたい。</p>

DOI： 10.20693/jspehss.69.37_1

CiNii Research

身体運動相談：ひきこもり学生支援の新たな試み

横山慶子・古橋忠晃・山本裕二

名古屋大学学生相談総合センター紀要 17 巻頁： 36-41 2017年

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