Manabe, Tomohiro

写真a

Affiliation

Research Centers and Institutes, Sports Medicine Research Center (Hiyoshi)

Position

Associate Professor

External Links
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Academic Degrees 【 Display / hide 】

  • 医学博士, Keio University, Coursework, 2004.03

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Books 【 Display / hide 】

  • アスリートにおける不整脈管理

    真鍋知宏, 日本臨牀社, 2025.01,  Page： 534

    Contact page： 501-504

  • アスレティックトレーナー専門科目テキスト５

    真鍋知宏, 文光堂, 2022.11

    Scope: 熱中症　病態と医学的留意事項・救急対応の意義,  Contact page： 137-142

  • 陸上競技コーチングブック

    大修館書店, 2022.07

    Scope: アンチ・ドーピング,  Contact page： 105-114

  • 整形外科医のためのスポーツ医学概論

    中山書店, 2021.10

    Scope: アンチ・ドーピング指導,  Contact page： 226-230

  • クリーンアスリートをめざして2021

    山澤　文裕、真鍋　知宏　他, 2021.03

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Papers 【 Display / hide 】

  • Differences in athlete’s left ventricular morphology by sex and sports discipline categories in elite Japanese athletes

    Ashikaga K., Manabe T., Tomori A., Endo N., Kamahara K.

    Physician and Sportsmedicine  2025

    ISSN  00913847

    　View Summary

    Objectives: The cardiac morphology of elite athletes is related to sports disciplines and race; however, no studies have examined the effects of sports discipline on East Asian athletes. Therefore, this study aimed to assess left ventricular (LV) remodeling using transthoracic echocardiography in elite Japanese athletes and establish standard values for the indicators of the cardiac morphology of elite athletes in East Asia, considering the influence of body size. Methods: We retrospectively evaluated 1,363 elite Japanese athletes who underwent electrocardiography and transthoracic echocardiography between January 2011 and December 2021. The athletes were assigned to four sports discipline categories (skill, power, mixed, and endurance). We evaluated the differences in LV volume and mass between the groups for each sex. Results: The LV end-diastolic volume (LVEDV) and LV mass indexed to the body surface area (BSA) in the endurance group (LVEDV/BSA: 72.3 ± 11.4 mL/m2 in males and 68.7 ± 11.0 mL/m2 in females, LV mass/BSA: 121.1 ± 19.1 g/m2 in males and 106.5 ± 18.0 g/m2 in females) were significantly larger than those of any other groups. Both values were affected by sex, BSA, and endurance sport type, whereas only LV mass was affected by age. Conclusion: Cardiac remodeling is proportional to the sport type, with a significantly greater effect in athletes playing endurance sports. The remodeling is particularly evident in the left ventricle; however, the corresponding remodeling is also observed in other heart chambers. Cardiac remodeling in elite Japanese athletes is similar to that observed in elite athletes of other races, except for the changes in LV wall thickness.

  • Sudden cardiac arrest during marathons among young, middle-aged, and senior runners

    Manabe T., Kato J., Yamasawa F.

    Resuscitation 204 2024.11

    Lead author, Corresponding author,  ISSN  03009572

    　View Summary

    Aim: There is limited evidence showing a relationship with age in the incidence of sudden cardiac arrest during exercise, which can be lethal at times. Methods: To examine the incidence by age group in sudden cardiac arrest, we prospectively observed cases of sudden cardiac arrest in full marathons certified by the Japan Association of Athletics Federations held between April 2011 and March 2019. Sudden cardiac arrest was defined as collapse during or 1 h after the race requiring chest compressions or the use of an automatic electrical defibrillation. Results: 4.1 million persons ran in 516 marathons. Of the participants, 78.6 % were men. By age group, 37.4 %, 34.7 %, 19.6 %, and 8.3 % belonged to the < 40 s, 40 s, 50 s, and ≥ 60 s groups, respectively. During the study period, 69 sudden cardiac arrests (1.7 per 100,000 participants, 95 % confidence interval [CI]: 1.3–2.1) were observed, of which 66 were men. The incidence per 100,000 runners of sudden cardiac arrest was 0.9 (95 % CI: 0.4, 1.4), 0.9 (95 % CI: 0.4, 1.4), 2.6 (95 % CI: 1.5, 3.8), and 5.5 (95 % CI: 2.9, 8.2) for those in their under 40 s, 40 s, 50 s, and over 60 s, respectively, with higher rates for older age groups. Compared to men, the cases of SCA among women were less common (only three cases), and the incidence did not differ by age group. Conclusions: Men, unlike women, had a higher incidence of sudden cardiac arrest during marathons according to age. Identification of this high-risk population could be important information in encouraging marathoners pre-participation self-screening.

  • Prevalence of anemia and iron deficiency and its association with body mass index in elite Japanese high school long-distance runners

    Shogo Tabata, Yuka Tsukahara, Hiroshi Kamada, Tomohiro Manabe, Fumihiro Yamasawa

    The Physician and Sportsmedicine (Physician and Sportsmedicine)   2023.10

    Research paper (scientific journal), Joint Work, Accepted,  ISSN  00913847

    　View Summary

    Objectives: Anemia is a common condition in long-distance runners (LDRs). Recently, not only iron deficiency (ID) but also energy deficiency has been considered as a risk factor for anemia in athletes but no evidence has yet been established. The aim of this study was to investigate the prevalence of anemia and ID and the influence of body mass index (BMI) on anemia in high-school LDRs. Methods: The participants were 406 male and 235 female elite Japanese LDRs who competed in the All-Japan High-School Ekiden Championship 2019. They submitted their anthropometric data and results of a blood test within five days after the competition. The prevalence of anemia and ID and the influence of BMI on anemia were assessed retrospectively. Results: Mean hemoglobin concentrations (Hb) were 14.8 ± 0.9 g/dl in males and 13.2 ± 0.9 g/dl in females. The prevalence of anemia (Hb < 14 g/dl in males and < 12 g/dl in females) was significantly higher in males (16.3%) than females (6.4%), but males also showed higher prevalence of non-iron deficiency anemia (NIDA) than females (11.6% and 3.0%, respectively). No significant gender difference was found in the prevalence of iron deficiency anemia (IDA) (4.7% in males and 3.4% in females). ID (serum ferritin level < 25 ng/ml) was significantly more prevalent in females (37.4%) than males (18.5%). A binary logistic regression analysis revealed that low BMI was a contributor to anemia in females (odds ratios: 0.577 (95% CI: 0.369–0.901), p = 0.012). Conclusion: In Japanese high-school LDRs, one in six males was anemic, but most males did not have ID. Conversely, one-third of females were diagnosed with ID. Lower BMI was identified as a risk for anemia in females, suggesting that leanness may also lead to anemia in females.

  • スポーツと循環器学

    真鍋知宏

    循環器ジャーナル (医学書院)  71 ( 1 ) 140 - 144 2023.01

    Research paper (scientific journal), Single Work, Lead author, Corresponding author

  • 陸上競技と感染症

    真鍋　知宏

    臨床スポーツ医学 (文光堂)  38 ( 8 ) 846 - 851 2021.08

    Research paper (scientific journal), Single Work

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Papers, etc., Registered in KOARA 【 Display / hide 】

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Reviews, Commentaries, etc. 【 Display / hide 】

  • スポーツ現場における熱中症と予防策及び発生時の対処法

    真鍋　知宏

    コーチング・クリニック (ベースボール・マガジン社)  35 ( 6 ) 4 - 7 2021.04

    Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media), Single Work

  • スポーツ活動時に注意すべき疾患　循環器疾患

    Manabe Tomohiro

    診断と治療 106 ( 12 ) 1479 - 1483 2018.12

    Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media), Single Work

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Presentations 【 Display / hide 】

  • 東京マラソン参加者の健康意識と生活習慣病について

    三橋敏武, 山澤文裕, 真鍋知宏, 堀口速史, 加藤基

    第30回日本臨床スポーツ医学会学術集会, 

    2019.11
    , 

    Oral presentation (general)

  • ジュニアアスリートのスポーツ障害をいかに防ぐか　メディカルチェックとその後の取り組み

    中嶋耕平, 土肥美智子, 半谷美夏, 星川淳人, 大庭治雄, 渡部厚一, 真鍋知宏

    第30回日本臨床スポーツ医学会学術集会, 

    2019.11
    , 

    Symposium, workshop panel (nominated)

  • 健康にランニングを続けるために距離制限は必要か　距離制限は必要か　ランナーの立場から

    三橋敏武, 山澤文裕, 真鍋知宏

    第30回日本臨床スポーツ医学会学術集会, 

    2019.11
    , 

    Symposium, workshop panel (nominated)

  • 東京マラソンにおけるランドクターの意義

    堀口速史, 山澤文裕, 三橋敏武, 真鍋知宏

    第30回日本臨床スポーツ医学会学術集会, 

    2019.11
    , 

    Oral presentation (general)

  • 東京マラソン2018出走予定者の心肺蘇生講習受講率に関する報告

    喜熨斗智也, 山澤文裕, 田中秀治, 三橋敏武, 真鍋知宏, 加藤基

    第22回日本臨床救急医学会総会・学術集会, 

    2019.05
    , 

    Oral presentation (general)

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Courses Taught 【 Display / hide 】

  • LECTURE ON PHYSICAL EDUCATION 2

    2025

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