Toru Ishihara

Dr. Toru Ishihara

Kobe University

Research Focus & Metrics

Academic Career Length

15Years (2012-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 September 2016 in Physiology & Behavior
Verified
Journal Article
Closed access
NMNoriteru Morita
Noriteru Morita
TNToshihiro Nakajima
Toshihiro Nakajima
KOKoichi Okita
Koichi Okita
TIToru Ishihara
Toru Ishihara
MSMasato Sagawa
Masato Sagawa
KYKoji Yamatsu
Koji Yamatsu

13 June 2017 in European Journal of Sport Science
Verified
Journal Article
Closed access
TIToru Ishihara
Toru Ishihara
SSShigemi Sugasawa
Shigemi Sugasawa
YMYusuke Matsuda
Yusuke Matsuda
MMMasao Mizuno
Masao Mizuno
This study evaluated the association between the frequency of tennis play and executive function in children and adolescents. One hundred and six junior tennis players (6–15 years old) participated in this study. Executive function, including inhibitory control, working memory, and cognitive flexibility were evaluated at rest. Females showed better inhibitory control and cognitive flexibility than males. In males, more frequent tennis play was associated with higher basic processing speed and inhibitory control after controlling for age, gender, body mass index (BMI), and tennis experience. More frequent tennis play was associated with better working memory in both males and females after controlling for age, gender, BMI, and tennis experience. Furthermore, longer tennis experience was related to better cognitive flexibility in males after controlling for age, gender, BMI, and frequency of tennis play. These findings suggest that tennis play is associated with the development of three foundational aspects of executive function (i.e. inhibitory control, working memory, cognitive flexibility). Especially, frequent participation in tennis play is related to better inhibitory control and working memory, while longer experience of tennis play is associated with better cognitive flexibility. Although development of inhibitory control and cognitive flexibility is slower in males than in females, the associations between tennis play and inhibitory control and cognitive flexibility appear to be larger in males than in females.

4 November 2016 in Journal of Sports Sciences
Verified
Journal Article
Closed access
TIToru Ishihara
Toru Ishihara
SSShigemi Sugasawa
Shigemi Sugasawa
YMYusuke Matsuda
Yusuke Matsuda
MMMasao Mizuno
Masao Mizuno
The aim of this cross-sectional study was to evaluate the relationships between cognitively engaging exercise (i.e., game-based and coordination exercises), executive functions (i.e., inhibitory control and working memory), and physical fitness. Forty junior tennis players (6–12 years old), who regularly participated in tennis lessons (2.55 years, SD = 1.61) prior to the study, were investigated. All participants completed evaluations of executive functions (inhibitory control and working memory) at rest. The duration of each lessons’ instructional activities, including coordination training, game-based exercise, rallying, and non-physical activity (explanations and breaks), was recorded. Physical fitness was evaluated using the Tennis Field Test. A longer duration of game-based exercise was positively correlated with inhibitory control and physical fitness. Coordination training was associated with improved working memory. Non-physical activity was inversely correlated with inhibitory control, working memory, and physical fitness. The results suggest that game-based tennis lessons have beneficial effects on inhibitory control and physical fitness levels, and a longer duration of coordination training is associated with better working memory. The present study indicates that shortened non-physical activity time within a sports setting is associated with the development of executive functions and physical fitness.

29 April 2020 in Scandinavian Journal of Medicine & Science in Sports
Verified
Journal Article
Closed access
PDF file
TIToru Ishihara
Toru Ishihara
TNToshihiro Nakajima
Toshihiro Nakajima
Koji YamatsuKoji Yamatsu
Koji Yamatsu
KOKoichi Okita
Koichi Okita
MSMasato Sagawa
Masato Sagawa
NMNoriteru Morita
Noriteru Morita

2 May 2017 in Developmental Science
Verified
Journal Article
Closed access
PDF file
TIToru Ishihara
Toru Ishihara
SSShigemi Sugasawa
Shigemi Sugasawa
YMYusuke Matsuda
Yusuke Matsuda
MMMasao Mizuno
Masao Mizuno

13 March 2018 in European Journal of Sport Science
Verified
Journal Article
Closed access
TIToru Ishihara
Toru Ishihara
MMMasao Mizuno
Masao Mizuno
The present study aimed to assess the effects of 12 months of frequent tennis play on executive functions and the relationships of daily moderate‐to‐vigorous physical activity (MVPA), physical competence, and enjoyment of playing tennis to executive functions in children. Thirty‐two children (6–11 years old) who had regularly played tennis (once a week; mean = 3 years, range = 0–6 years) before the study were enrolled in a 12‐month intervention. Participants were allocated into two groups: low‐dose (maintain current frequency of tennis play, N = 19) or high‐dose (increased frequency of tennis play to four times per week, N = 13). Participants’ MVPA, physical competence, enjoyment of playing tennis, and executive functions (i.e. inhibitory control, working memory, and cognitive flexibility) were evaluated before and after this intervention. The high‐dose group demonstrated a greater improvement in working memory than the low‐dose group, while there was no group difference in MVPA, physical competence, and enjoyment of playing tennis. Changes in MVPA were associated with improvements in cognitive flexibility. Changes in physical competence were associated with improvements in working memory and cognitive flexibility. Changes in the enjoyment of playing tennis were associated with improvements in inhibitory control. The current findings suggest that replacement of MVPA with sports activity, such as tennis enhances executive functions development, and suggest that sports programmes that seek to build competence and enjoyment might help support the development of executive functions in children.