Koichi Iwai

Biographic Data

ID3638177
NAMEKoichi Iwai
GIVEN NAMESKoichi
FAMILY NAMEIwai
SIGNATUREIWAI K
AFFILIATIONSIbaraki Prefectural University of Health Sciences
ORCID0000-0003-3514-6555
VERIFIEDYes
TOTAL WORKS5
TOTAL CITATIONS2
WORKS AS AUTHOR5
WORKS AS EDITOR0
FIRST PUBLICATION YEAR1992
LATEST PUBLICATION YEAR2026
H-INDEX1

  • Posterior ankle soft tissue echo intensity is associated with anterior ankle pain and dorsiflexion limitation following ankle fracture surgery

    Open AccessHayato Miyasaka, Bungo Ebihara et al.ARTICLEFrontiers in Sports and Active…2026

    Background Limited ankle dorsiflexion range of motion (ROM) and anterior ankle pain are common sequelae following ankle fracture surgery. While anterior ankle impingement syndrome (AAIS) is traditionally linked to anterior structural changes, the role of posterior soft tissues, such as the flexor hallucis longus (FHL) and Kager's fat pad (KFP), is unclear. This study aimed to investigate the association between the echo intensity (EI) of posterio…

  • Reasons for the Reporting Behavior of Japanese Collegiate Rugby Union Players Regarding Suspected Concussion Symptoms

    Open AccessKeita Suzuki, Satoshi Nagai et al.ARTICLEInternational Journal of…2023

    While previous research has identified the reasons for the concussion-reporting behavior of rugby union players, the influence of confounding factors such as concussion experience, education, and knowledge of concussion symptoms, any of which may have influenced the results, has not been considered. This study aimed to clarify the reasons for the reporting behavior of college rugby union players regarding suspected concussion symptoms by adjustin…

  • Difference in Personality Traits and Symptom Intensity According to the Trigger-Based Classification of Throwing Yips in Baseball Players

    Open AccessToshiyuki Aoyama, Kazumichi Ae et al.ARTICLEFrontiers in Sports and Active…2021Cited by: 2References: 34

    The triggers of initial onset of yips symptoms can be broadly divided into psychological and non-psychological factors; however, a trigger-based classification of yips has not been established. This study aims to obtain insight into the prevention of yips by clarifying whether there are differences in symptoms and personality traits according to a trigger-based classification of yips in baseball players. A total of 107 college baseball players re…

  • Influence of lifestyle and exercise habits on the deep squatting posture in Japanese children

    Open AccessMegumi Takizawa, Maki Yamaguchi et al.ARTICLEAnthropological Science2014References: 3

    本研究は児童における蹲踞姿勢の実態調査を行い,生活様式や運動習慣との関連性を調べた。対象は小学校1~6年生の68名(男子36名,女子32名)とした。姿勢観察は自由課題(床の高さで絵を描く際に選択する姿勢)と指示課題(踵を接地した蹲踞の可不可)の2課題とした。生活様式(便座の種類,寝具の種類,他),特定の運動習慣の有無は保護者から情報収集した。関節可動性は足関節の背屈角度と長座体前屈を計測した。結果,自由課題で蹲踞を選択した者は6割,指示課題で踵を接地した蹲踞が可能だった者は7割だった。多重ロジスティック回帰分析の結果,選択する姿勢は寝具の種類(調整オッズ比:3.6,95%信頼区間:1.2–11.5,p < 0.05)と学年(調整オッズ比:5.2,95%信頼区間:1.4–18.9,p < 0.01)が関係した。踵を接地した蹲踞の可不可には特定の運動習慣の有無(調整オッズ比:9.2,95%信頼区間:1.8–47.7,p < 0.01)が関係した。児童の蹲踞姿勢において,性や関節の可動域は有意…

  • Tobacco use among Japanese schoolchildren

    Open AccessKOH-EI MINAGAWA, NOBUKI NISHIOKA et al.ARTICLEHealth Promotion International1992

    Over the past two decades many studies have shown associations between smoking and increased health problems. Smoking among children is especially a major public health concern. Preventing young people from developing a smoking habit is an important goal for school health education. In Japan, it is difficult to collect accurate data regarding adolescent smoking behaviour, because in Japan smoking under the age of 20 is prohibited by law. Therefor…