Details of the Researcher

PHOTO

Section
Graduate School of Biomedical Engineering
Job title
Assistant Professor

Research History 1

  • 2021/04 - 2023/03
    Juntendo University　The Institute of Health and Sports Science & Medicine　Postdoctoral Researcher

Education 5

  • University of Tsukuba　Graduate School of Comprehensive Human Sciences　Sports Medicine

    2016/04 - 2021/03

  • University of Iowa　Department of Physical Therapy and Rehabilitation Science

    2019/01 - 2019/09

  • University of Otago　School of Physiotherapy

    2018/09 - 2018/12

  • University of Tsukuba　Graduate School of Comprehensive Human Sciences

    2014/04 - 2016/03

  • Hokkaido University　School of Medicine　Department of Health Sciences

    2010/04 - 2014/03

Research Interests 4

  • Movement Assessment

  • Ankle Sprain

  • Sports Medicine

  • Physical Therapy

Research Areas 1

  • Life sciences / Rehabilitation science / Physical Therapy

Papers 36

  1. Center of mass displacement and lower limb kinematics during the side hop test in individuals with and without chronic ankle instability

    Shojiro Nozu, Tadamitsu Matsuda, Yuji Takazawa

    Physical Therapy in Sport　2025/11

    DOI： 10.1016/j.ptsp.2025.09.009 　

  2. 日本におけるスポーツ医学教育の現状と課題 スポーツ医学と多職種連携

    高澤 祐治, 深尾 宏祐, 塩田 有規, 小松 孝行, 染谷 由希, 井澤 秀典, 室伏 由佳, 窪田 敦之, 野津 将時郎, 内野 小百合, 塩澤 淳, 山口 達也, 青柳 壮志, 長尾 雅史

    日本臨床スポーツ医学会誌　33　(2)　240-242　2025/04

    Publisher: (一社)日本臨床スポーツ医学会

    ISSN： 1346-4159

    eISSN： 2758-3767

  3. Postural control strategies in individuals with and without chronic ankle instability during the reach phase of the posteromedial direction of the star excursion balance test

    Shojiro Nozu, Kristin A. Johnson, Tadamitsu Matsuda, Yuji Takazawa

    Physical Therapy in Sport　2025/03

    DOI： 10.1016/j.ptsp.2024.12.008 　

  4. Kinetic Factors Related to the Side Hop Test Time in Healthy Individuals

    Kyoya Ono, Shojiro Nozu, Takuya Yoshida, Masamichi Okudaira, Kazuki Ota, Satoru Tanigawa

    Translational Sports Medicine　2025/01

    DOI： 10.1155/tsm2/3241325 　

  5. 日本におけるスポーツ医学教育の現状と課題 スポーツ医学と多職種連携

    高澤 祐治, 塩田 有規, 小松 孝行, 染谷 由希, 井澤 秀典, 野津 将時郎, 室伏 由佳, 山口 達也, 青柳 壮志, 内野 小百合, 深尾 宏祐, 長尾 雅史, 窪田 敦之

    日本臨床スポーツ医学会誌　32　(4)　S166-S166　2024/10

    Publisher: (一社)日本臨床スポーツ医学会

    ISSN： 1346-4159

    eISSN： 2758-3767

  6. 消防団員の演習訓練中における外傷・障害予防を目的とした運動プログラムの開発

    宮森 隆行, 長尾 雅史, 西尾 啓史, 岩木 峻平, 野津 将時郎, 斎藤 正治, 福井 隆久, 吉田 友哉, 甲能 萌, 高澤 祐治

    順天堂保健医療学雑誌　5　40-45　2024/09

    Publisher: 順天堂大学保健医療学部

    ISSN： 2435-5852

    eISSN： 2435-5860

  7. 膝蓋腱炎に対する日本語版the Victorian Institute of Sports Assessment for Patellar tendinopathy(VISA-P-J)の異文化適応,妥当性,信頼性,反応性についての検討

    富樫 維親, 長尾 雅史, 西尾 啓史, 野津 将時郎, 塩田 有規, 高澤 祐治

    日本臨床スポーツ医学会誌　32　(3)　375-383　2024/08

    Publisher: (一社)日本臨床スポーツ医学会

    ISSN： 1346-4159

    eISSN： 2758-3767

  8. Reliability and validity of muscle activity analysis using wearable electromyographs.

    Tadamitsu Matsuda, Takayuki Miyamori, Yuji Fujino, Shojiro Nozu, Yuma Kajiwara

    Journal of physical therapy science　36　(3)　123-127　2024/03

    DOI： 10.1589/jpts.36.123 　

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    [Purpose] The aim of this study was to develop a novel wearable surface electromyograph called NOK, and compare its reliability and validity to an existing electromyograph. [Participants and Methods] The study participants were 23 healthy university students (Seven males and 16 females; age 20.3 ± 1.1 years [mean ± standard deviation]; height 162.0 ± 6.7 cm; weight 58.4 ± 10.1 kg) who all gave informed written consent. The newly developed electromyograph (NOK) features a rubberized skin contact surface that requires no electrodes and allows the acquisition of up to 10 channels of muscle waveforms on a portable personal computer. After measuring maximal isometric elbow extension and flexion, we examined muscle waveforms during isometric contractions of elbow joint flexion and extension at approximately 50% of maximal voluntary contraction using both NOK and Delsys electromyographs and compared the results of the two devices. [Results] We found a significant moderate correlation between the measurements by the two devices for biceps and triceps. The measurements by the two devices also showed strong measure-retest reliability. Systematic errors were observed for elbow flexion and extension in the two measurements, indicating limited agreement between the two measurement methods. [Conclusion] Although the new device also has high repeatability and reliability, it is unsuitable for analyzing detailed muscle activity. However, since it can measure up to 10 channels of muscle activity, it is expected to be used in the rehabilitation and sports field in the future.

  9. Cross-cultural Adaptation, Validity, Reliability and Responsiveness of the Japanese Version of the Victorian Institute of Sports Assessment for Patellar Tendinopathy (VISA-P-J)

    Togashi I, Nagao M, Nishio H, Nozu S, Shiota Y, Takazawa Y

    Japanese Journal of Clinical Sports Medicine　32　(3)　375-383　2024

    Publisher: Japanese Society of Clinical Sports Medicine

    DOI： 10.57474/jjcsm.32.3_375 　

    ISSN： 1346-4159

    eISSN： 2758-3767

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    This study aimed to translate, adapt, and assess the psychometric properties of the Japanese version of the Victorian Institute of Sports Assessment for Patellar Tendinopathy (VISA-P-J). We enrolled 43 participants ≥ 18 years with a history of painful patellar tendon symptoms lasting ≥ 1 month for patellar tendinopathy. We evaluated pain levels during daily activities and sports, symptom classification, and patient global impression of change at baseline, 1 week, and 12 weeks. We assessed the psychometric properties, including reliability, validity, responsiveness, and interpretability, of the VISA-P-J following COSMIN guidelines. The intraclass correlation coefficient for the test-retest reliability of VISA-P-J was 0.87, with a standard error of measurement of 0.89. The Cronbach’s alpha for internal consistency of VISA-P-J was 0.81. Criterion validity showed a correlation between VISAP- J scores and symptom classification, pain during daily life, and pain during sports activities (r=-0.52, r=-0.66, r =-0.86, respectively ; p ＜ 0.01 ) . Construct validity and responsiveness of VISA-P-J were confirmed through hypothesis-testing methods. The minimal clinically important difference for VISA-P-J was determined to be 7 points. This study demonstrates that VISA-P-J is a reliable, valid, and responsive assessment tool for individuals experiencing chronic patellar tendon pain.

  10. Relationship between the contact load and time-loss injuries in rugby union. International-journal

    Yusuke Iwasaki, Yuki Someya, Masashi Nagao, Shojiro Nozu, Yuki Shiota, Yuji Takazawa

    Frontiers in sports and active living　6　1395138-1395138　2024

    DOI： 10.3389/fspor.2024.1395138 　

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    OBJECTIVE: Quantifying and managing the matches and training loads of players is important for injury prevention. As rugby union is a full-contact sport and frequent contact injuries occur, it might also be important to quantify and manage players' contact loads. This study aimed to clarify the relationship between contact load and injury incidence in elite rugby union players. METHODS: Forty-eight elite rugby union players (27.0 ± 3.5 years) in Japan were monitored during one season (8 months). The contact load, an index of training load, was evaluated as collision count and collision load measured using a global positioning system device, and then calculated using the acute:chronic workload ratio (ACWR) based on the exponentially weighted moving average (EWMA). The association between the EWMA-ACWR of contact load and injury incidence was analyzed using generalized estimating equations. RESULTS: Of the 58 injuries during one season, 70.7% were contact injuries. Collision counts and collision load calculated by EWMA-ACWR were associated with the risk of injury (p < 0.01 both), with the odds ratios were 4.20 [95% confidence interval (CI): 1.74-10.11] and 4.44 (95% CI: 1.95-10.13), respectively. CONCLUSION: Contact load calculated using EWMA-ACWR was associated with injury in elite rugby union players.

  11. ポンプ操法訓練中の外傷・障害予防を目的とした運動プログラムの開発

    岩木 峻平, 宮森 隆行, 高澤 祐治, 長尾 雅史, 西尾 啓史, 野津 将時郎, 吉田 友哉, 甲能 萌, 福井 隆久, 斎藤 正治

    日本臨床スポーツ医学会誌　31　(4)　S233-S233　2023/10

    Publisher: (一社)日本臨床スポーツ医学会

    ISSN： 1346-4159

    eISSN： 2758-3767

  12. Differences in the elastic modulus of the lumbar muscles between female athletes with and without low back pain. International-journal

    Takayuki Miyamori, Taiki Saito, Masashi Aoyagi, Shojiro Nozu, Yuki Masui, Yoshihiko Ishihara, Yu Shimasaki, Masafumi Yoshimura

    Clinical biomechanics (Bristol, Avon)　105　105968-105968　2023/05

    DOI： 10.1016/j.clinbiomech.2023.105968 　

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    BACKGROUND: Low back pain is the most prevalent musculoskeletal disorder affecting performance and sports participation among athletes and is more prevalent among female athletes. Evaluating the stiffness of the lumbar muscles is important for understanding the pathophysiology of low back pain. Therefore, this study examined the differences in stiffness of the lumbar multifidus and erector spinae muscles between female university athletes with and without low back pain. METHODS: This was a cross-sectional study. The study was conducted at a single centre, the university research laboratory. Twenty female university athletes with low back pain or a history of low back pain and 20 without low back pain participated in this study. The shear elastic moduli of the multifidus and erector spinae muscles were evaluated in the prone (to relax the muscles) and sitting with 35° of trunk flexion (to stretch the muscles) positions using shear wave ultrasound imaging equipment. FINDINGS: The low back pain group showed significantly greater shear elastic modulus in the multifidus in both prone and sitting positions than the non-low back pain group. There were no differences in the erector spinae muscle between the two groups at either position. INTERPRETATION: These results provide new insights into the microscopic characteristics of low back pain pathophysiology in young female athletes. Stiffness assessment using shear wave elastography will help provide a specific treatment strategy for female athletes with low back pain or a history of low back pain.

  13. Cross-cultural adaptation, validity, reliability and responsiveness of the Japanese version of the Victorian Institute of sports assessment for patellar tendinopathy (VISA-P-J). International-journal Peer-reviewed

    Ishin Togashi, Masashi Nagao, Hirofumi Nishio, Shojiro Nozu, Yuki Shiota, Yuji Takazawa

    BMC sports science, medicine & rehabilitation　15　(1)　5-5　2023/01/11

    DOI： 10.1186/s13102-023-00615-5 　

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    BACKGROUND: This study aimed to translate, adapt, and test the psychometric properties of the Japanese version of the Victorian Institute of sports assessment for patellar tendinopathy (VISA-P-J). METHODS: This prospective cohort study registered 43 participants ≥ 18 years old with a history of painful symptoms in the inferior pole of the patella to the proximal patellar tendon lasting ≥ 1 month for patellar tendinopathy. Pain in daily life and during sports activities, symptom classification, and patient global impression of change were assessed at the baseline, 1 week, and 12 weeks. The psychometric properties, test-retest reliability, standard error of measurement, internal consistency criterion validity, construct validity, responsiveness, and interpretability, of the VISA-P-J were calculated according to the COSMIN. RESULTS: The two-way random-effects, absolute agreement intraclass correlation coefficient for test-retest reliability of VISA-P-J was 0.87 (95% confidence interval: 0.78, 0.93), and the standard error of measurement of VISA-P-J was 0.89. The Cronbach's alpha for internal consistency of VISA-P-J was 0.81. A correlation between VISA-P-J and Roel's classification, Visual Analog Scale for pain (VAS)-Active Daily Living, and VAS-Sports (r = - 0.52, r = - 0.66, r = - 0.86, p < 0.01, respectively) was observed for criterion validity. All hypotheses of the hypothesis-testing method to evaluate construct validity and responsiveness of VISA-P-J were substantiated. The minimal clinically important difference of VISA-P-J was 7 points. CONCLUSION: We demonstrated that the VISA-P-J was a reliable, valid, and responsive assessment method for individuals with chronic pain in the patellar tendon.

  14. Effect of Isokinetic Training with Blood Flow Restriction During Rest Interval Versus Exercise on Muscle Strength, Hypertrophy, and Perception: A Pilot Study

    TSUKASA TANAKA, ATSUSHI KUBOTA, HAYAO OZAKI, HIROFUMI NISHIO, SHOJIRO NOZU, YUJI TAKAZAWA

    Juntendo Medical Journal　69　(6)　477-484　2023

    Publisher: The Jutendo Medical Journal

    DOI： 10.14789/jmj.jmj23-0014-oa 　

    ISSN： 2187-9737

    eISSN： 2188-2126

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    OBJECTIVES: This study aimed to determine the effects of high-intensity isokinetic training with blood flow restriction during rest interval between set (rBFR) versus during exercise (eBFR) on muscle hypertrophy and increasing muscle strength and determine whether BFR-induced exercise pain is suppressed by rBFR. MATERIALS AND METHODS: Fourteen arms (7 participants) were recruited for the study. We conducted the following interventions for each arm: eBFR (n=4), rBFR (n=5), and exercise only (CON, n=5). The participants performed elbow flexion training with a BIODEX device twice weekly for 8 weeks. This study training consisted of total four sets; each was performed until <50% peak torque was achieved twice consecutively. BFR pressure was set at 120 mmHg. Elbow flexor peak torque during concentric contraction (CC), isometric contraction (IM), and muscle cross-sectional area (CSA) were measured before and after the intervention. Numerical rating scale scores used to assess pain during exercise were determined during training. RESULTS: Peak torque at the CC increased in the rBFR (p<0.05) and IM increased in the rBFR and CON (p<0.05), while CSA increased in the rBFR and CON (p<0.001). The pain during exercise was severe in the eBFR and moderate in the rBFR and CON. CONCLUSIONS: This study's showed that high-intensity isokinetic training with rBFR did not have a synergistic effect on increasing muscle strength and muscle size. Additionally, high-intensity isokinetic training with BFR when it may be best not to perform it during exercise, because it was induces severe pain and may inhibit increases in muscle strength.

  15. The Accuracy of Ankle Eccentric Torque Control Explains Dynamic Postural Control During the Y-Balance Test. International-journal Peer-reviewed

    Shojiro Nozu, Kristin A Johnson, Tsukasa Tanaka, Mika Inoue, Hirofumi Nishio, Yuji Takazawa

    International journal of sports physical therapy　18　(5)　1113-1122　2023

    DOI： 10.26603/001c.87760 　

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    BACKGROUND: The Y-Balance Test (YBT), especially the posteromedial (PM) reach direction (PM-YBT), is able to identify dynamic postural control deficits in those who have ankle instability. However, there still exists a need to understand how sensorimotor function at the ankle explains the performance during the PM-YBT. HYPOTHESIS/PURPOSE: The purpose of this study was to determine whether the ability to accurately control eccentric ankle torque explained PM-YBT performance. It was hypothesized that eccentric dorsiflexion/plantarflexion torque control would be positively related to the maximum reach distance (MRD) of PM-YBT. STUDY DESIGN: Cross-sectional study. METHODS: Twelve healthy subjects performed the PM-YBT, maximum voluntary isometric contractions (MVIC) for both dorsiflexion and plantarflexion muscle strength, and then the torque control testing of the ankle. The torque control testing provided a target torque level on a screen in front of the subject and passive rotations of the ankle joint in the sagittal plane at 10 deg/sec between plantarflexion to dorsiflexion. Subjects were then instructed to eccentrically contract the dorsiflexors and plantar flexors to generate torque while the ankle joint rotated. The accuracy of torque control during eccentric dorsiflexion and plantarflexion by calculating absolute errors, the area between the target torque and the produced torque were evaluated. Tibialis anterior and soleus muscle activities were simultaneously recorded during testing. A step-wise linear regression model was used to determine the best model predicted the MRD of the PM-YBT (PM-MRD). RESULTS: A step-wise linear regression developed a model explaining only eccentric dorsiflexion torque control predicted higher PM-MRD score (R2 = 44%, F1,10 = 7.94, β = -0.67, p = 0.02). CONCLUSION: The accuracy of torque control during eccentric dorsiflexion predicts better performance in the PM-YBT. LEVEL OF EVIDENCE: 3b.

  16. トレーニングと血流制限を分けた血流制限トレーニングが筋肥大および筋力向上効果に及ぼす影響

    田中 吏, 窪田 敦之, 尾崎 隼朗, 野津 将時郎, 西尾 啓史, 高澤 祐治

    日本トレーニング科学会　35回　63-63　2022/12

    Publisher: 日本トレーニング科学会

  17. 日本語版The Victorian Institute of Sport Assessment Scale for Patellar Tendinopathy(VISA-P)の妥当性・信頼性の検証

    富樫 維親, 長尾 雅史, 西尾 啓史, 野津 将時郎, 塩田 有規, 高澤 祐治

    日本臨床スポーツ医学会誌　30　(4)　S214-S214　2022/10

    Publisher: (一社)日本臨床スポーツ医学会

    ISSN： 1346-4159

  18. ラグビーにおけるコンタクトプレーによる負荷と外傷・障害発生との関係

    岩崎 裕介, 塩田 有規, 長尾 雅史, 染谷 由希, 野津 将時郎, 佐伯 悠里香, 河瀬 麻希, 高澤 祐治

    日本臨床スポーツ医学会誌　30　(4)　S270-S270　2022/10

    Publisher: (一社)日本臨床スポーツ医学会

    ISSN： 1346-4159

  19. 常圧低酸素環境下における運動中の血中酸素飽和度に対する酸素水摂取の影響

    井澤 秀典, 長尾 雅史, 野津 将時郎, 塩田 有規, 深尾 宏祐, 西尾 啓史, 高澤 祐治

    日本臨床スポーツ医学会誌　30　(4)　S336-S336　2022/10

    Publisher: (一社)日本臨床スポーツ医学会

    ISSN： 1346-4159

  20. 日本語版The Victorian Institute of Sport Assessment Scale for Patellar Tendinopathy(VISA-P)の妥当性・信頼性の検証

    富樫 維親, 長尾 雅史, 西尾 啓史, 野津 将時郎, 塩田 有規, 高澤 祐治

    日本臨床スポーツ医学会誌　30　(4)　S214-S214　2022/10

    Publisher: (一社)日本臨床スポーツ医学会

    ISSN： 1346-4159

  21. 国内エリートサッカー選手における主観的疲労度および運動負荷量と外傷・障害発生との関係

    河瀬 麻希, 染谷 由希, 岩崎 裕介, 佐伯 悠里香, 野津 将時郎, 秋吉 直樹, 小林 洋平, 長尾 雅史, 齋田 良知, 塩田 有規, 高澤 祐治

    日本臨床スポーツ医学会誌　30　(4)　S238-S238　2022/10

    Publisher: (一社)日本臨床スポーツ医学会

    ISSN： 1346-4159

  22. ラグビーにおけるコンタクトプレーによる負荷と外傷・障害発生との関係

    岩崎 裕介, 塩田 有規, 長尾 雅史, 染谷 由希, 野津 将時郎, 佐伯 悠里香, 河瀬 麻希, 高澤 祐治

    日本臨床スポーツ医学会誌　30　(4)　S270-S270　2022/10

    Publisher: (一社)日本臨床スポーツ医学会

    ISSN： 1346-4159

  23. 第24回夏季デフリンピック競技大会(ブラジル)における医学サポート

    塩田 有規, 染谷 咲子, 野津 将時郎, 小松 孝行, 立石 智彦, 薬師寺 道代, 鈴木 大地, 高澤 祐治

    日本臨床スポーツ医学会誌　30　(4)　S285-S285　2022/10

    Publisher: (一社)日本臨床スポーツ医学会

    ISSN： 1346-4159

  24. 常圧低酸素環境下における運動中の血中酸素飽和度に対する酸素水摂取の影響

    井澤 秀典, 長尾 雅史, 野津 将時郎, 塩田 有規, 深尾 宏祐, 西尾 啓史, 高澤 祐治

    日本臨床スポーツ医学会誌　30　(4)　S336-S336　2022/10

    Publisher: (一社)日本臨床スポーツ医学会

    ISSN： 1346-4159

  25. 国内エリートサッカー選手における主観的疲労度および運動負荷量と外傷・障害発生との関係

    河瀬 麻希, 染谷 由希, 岩崎 裕介, 佐伯 悠里香, 野津 将時郎, 秋吉 直樹, 小林 洋平, 長尾 雅史, 齋田 良知, 塩田 有規, 高澤 祐治

    日本臨床スポーツ医学会誌　30　(4)　S238-S238　2022/10

    Publisher: (一社)日本臨床スポーツ医学会

    ISSN： 1346-4159

  26. Effect of low-intensity exercise with blood flow restriction during rest intervals on muscle function and perception. International-journal

    Tsukasa Tanaka, Atsushi Kubota, Shojiro Nozu, Hayao Ozaki, Kohei Kishimoto, Hirofumi Nishio, Yuji Takazawa

    Clinical physiology and functional imaging　42　(5)　348-355　2022/09

    DOI： 10.1111/cpf.12775 　

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    PURPOSE: We assessed the effects of low-intensity exercise with blood flow restriction (BFR) during rest intervals on recovery of muscle function and pain during exercise and rest intervals. METHODS: Participants were 10 males and study arms of the participants were randomly assigned into three conditions; low-intensity exercise with BFR during rest intervals (rBFR), low-intensity exercise with BFR during exercise (eBFR) and low-intensity exercise only (EO). The exercise task was elbow flexion until repetition failure at 30% of 1 RM and cuff pressure was 120 mmHg. The maximum voluntary isometric contraction (MVIC) and the muscle endurance (ME) were measured pre, post, 1, 24 and 48 h after the exercise. Pain during exercise and rest intervals were evaluated using the Numerical Rating Scale. RESULTS: MVIC and ME significantly decreased after exercise in all conditions. Pain during exercise was lower in rBFR (4.2 ± 2.9) (p = 0.007) and EO (4.4 ± 2.7) (p = 0.014) conditions compared to eBFR condition (6.7 ± 1.7), but the pain during rest intervals was more intense in rBFR condition (5.2 ± 1.6) compared to eBFR (1.5 ± 1.4) and EO (1.7 ± 1.2) conditions (p < 0.001). CONCLUSION: We discovered that recovery of muscle function was the same as BFR during rest intervals and BFR during exercise. Also, our results suggested that BFR itself may cause the perception of pain. Future studies are thus required to investigate the optimal dosage focusing on the pressure volume and intensity used in BFR during intervals.

  27. 常圧低酸素条件下で運動中の血液酸素飽和度に対する高濃度酸素水摂取の影響 無作為化プラセボ対照単盲検試験(Effects of Drinking Oxygenated Water on Blood Oxygen Saturation During Exercise Under Normobaric Hypoxic Conditions: A Randomized Placebo-controlled Single-blinded Trial)

    Izawa Hidenori, Nagao Masashi, Nozu Shojiro, Shiota Yuki, Fukao Kosuke, Nishio Hirofumi, Takazawa Yuji

    順天堂醫事雑誌　68　(3)　228-234　2022/06

    Publisher: 順天堂医学会

    ISSN： 2187-9737

    eISSN： 2188-2126

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    健常成人22名(男性16名、女性6名、平均22.4±2.73歳)を無作為にOX群と対照群に分け、常圧低酸素条件下(酸素濃度15.2%)で30分間の歩行運動を行わせた。運動中に血液酸素飽和度(SpO2)、脈拍(PR)および歩行距離を測定した。運動前および運動中にOX群に酸素化ミネラルウォーター(高濃度酸素水)、対照群に通常のミネラルウォーターを摂取させた。両群において運動中にSpO2は低下、PRは上昇した。OX群のSpO2低下は対照群と比べて小さく、PR上昇は大きかった。両群の歩行距離に有意差はなかった。以上の結果から、常圧低酸素条件下で運動前の高濃度酸素水摂取はSpO2の低下を抑制すると考えられた。

  28. Kinetic and Kinematic Analyses of Countermovement Jump in a Small Sample of Individuals with Congenital Vision Loss. International-journal

    Masaki Iguchi, Shojiro Nozu, Toru Sakuma

    Perceptual and motor skills　315125211073024-315125211073024　2022/03/03

    DOI： 10.1177/00315125211073024 　

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    In the present study, we aimed to explore whether countermovement jumps (CMJs) performed by young adults with and without visual impairment (VI) differ. We compared three participants with congenital VI to 10 participants without congenital VI when both groups performed CMJs with maximum effort. Although the maximum jump height did not differ between groups, all three participants with VI showed such reduced maximum downward velocity of the center of body mass and a relative net negative vertical impulse that, on these measures, they fell beyond two standard deviations from the mean scores of participants without VI. The range of motion for the leg joints and countermovement depth did not differ between groups. Although findings from our small sample should be cross-validated and trainers should take care to protect athletes from falls, it appears from our preliminary data that a path to improved CMJ performance for athletes with VI is to increase their movement velocity in the countermovement phase of the jump.

  29. Trunk Angle Modulates Feedforward and Feedback Control during Single-Limb Squatting. International-journal Peer-reviewed

    Kristin A Johnson, Shojiro Nozu, Richard K Shields

    Journal of functional morphology and kinesiology　6　(4)　2021/10/07

    DOI： 10.3390/jfmk6040082 　

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    Trunk positioning and unexpected perturbations are high-risk conditions at the time of anterior cruciate ligament injury. The influence of trunk positioning on motor control responses to perturbation during dynamic performance is not known. We tested the influence of trunk position on feedforward and feedback control during unexpected perturbations while performing a novel single-limb squatting task. We also assessed the degree that feedforward control was predictive of feedback responses. In the flexed trunk condition, there were increased quadriceps (p < 0.026) and gluteus medius long-latency reflexes (p < 0.001) and greater quadriceps-to-hamstrings co-contraction during feedforward (p = 0.017) and feedback (p = 0.007) time bins. Soleus long-latency reflexes increased more than 100% from feedforward muscle activity regardless of trunk condition. Feedforward muscle activity differentially predicted long-latency reflex responses depending on the muscle (R2: 0.47-0.97). These findings support the concept that trunk positioning influences motor control responses to perturbation and that feedback responses may be invariant to the feedforward control strategy.

  30. 大学生における新型コロナウィルス(COVID-19)感染拡大に伴う生活の変化が睡眠に及ぼす影響

    西嶋 佳太, 西尾 啓史, 田中 吏, 富樫 維親, 野津 将時郎, 窪田 敦之, 塩田 有規, 高澤 祐治

    日本臨床スポーツ医学会誌　29　(4)　S155-S155　2021/10

    Publisher: (一社)日本臨床スポーツ医学会

    ISSN： 1346-4159

    eISSN： 2758-3767

  31. 大学生アスリートは片脚で40cmの高さから立ち上がれるのか?

    田中 吏, 窪田 敦之, 藤田 真平, 西尾 啓史, 長尾 雅史, 野津 将時郎, 塩田 有規, 高澤 祐治, 桜庭 景植

    日本臨床スポーツ医学会誌　29　(4)　S180-S180　2021/10

    Publisher: (一社)日本臨床スポーツ医学会

    ISSN： 1346-4159

    eISSN： 2758-3767

  32. 剣道における"構え"とアキレス腱傷害の関連性について

    安井 飛鳥, 西尾 啓史, 田中 吏, 富樫 維親, 野津 将時郎, 窪田 敦之, 塩田 有規, 高澤 祐治

    日本臨床スポーツ医学会誌　29　(4)　S181-S181　2021/10

    Publisher: (一社)日本臨床スポーツ医学会

    ISSN： 1346-4159

    eISSN： 2758-3767

  33. Disrupted somatosensory input alters postural control strategies during the Star Excursion Balance Test (SEBT) in healthy people Peer-reviewed

    Shojiro Nozu, Kristin A. Johnson, Masahiro Takemura, Richard K. Shields

    Gait & Posture　90　141-147　2021/10

    Publisher: Elsevier BV

    DOI： 10.1016/j.gaitpost.2021.08.023 　

    ISSN： 0966-6362

  34. Assessments of Sensorimotor Deficits Used in Randomized Clinical Trials With Individuals With Ankle Sprains and Chronic Ankle Instability: A Scoping Review Peer-reviewed

    Shojiro Nozu, Masahiro Takemura, Gisela Sole

    PM&R　2020/11/23

    Publisher: Wiley

    DOI： 10.1002/pmrj.12487 　

    ISSN： 1934-1482

    eISSN： 1934-1563

  35. The relationship of the reach distance during the Star Excursion Balance Test with trunk lean angles and ankle flexibility Peer-reviewed

    Shojiro Nozu, Masahiro Takemura, Shumpei Miyakawa

    Japanese Journal of Physical Fitness and Sports Medicine　69　(3)　279-284　2020/06/01

    Publisher: The Japanese Society of Physical Fitness and Sports Medicine

    DOI： 10.7600/jspfsm.69.279 　

    ISSN： 0039-906X

    eISSN： 1881-4751

  36. 車いすバスケットボール選手のメディカルサポートと鍼灸あん摩マッサージ指圧に関するアンケート調査 Peer-reviewed

    櫻庭 陽, 近藤 宏, 佐久間 亨, 中村 直子, 松井 康, 野津 将時郎, 福永 克己, 渡邊 昌宏, 木下 裕光, 石塚 和重

    日本障害者スポーツ学会誌　27　(27)　30-35　2019/01

    Publisher: 日本障害者スポーツ学会

    ISSN： 1881-8218

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Misc. 1

  1. 長距離ランナーにおける足部アーチ形態と地面反力の関係性について

    入口海, 入口海, 野津将時郎, 野津将時郎, 富樫維親, 富樫維親, 富樫維親, 青柳壮志, 青柳壮志, 内野小百合, 高澤祐治, 高澤祐治, 高澤祐治, 高澤祐治

    ランニング学会大会　37th　2025

Presentations 10

  1. Postural Control Strategies between Individuals with/without Chronic Ankle Instability during the Star Excursion Balance Test

    Shojiro Nozu, Tadamitsu Matsuda, Yuji Takazawa

    10th International Ankle Symposium 2024　2024/10/04

  2. Effect of limited dorsiflexion range of motion on the outcome of the clinical balance test in individuals with chronic ankle instability

    Shojiro Nozu, Tadamitsu Matsuda, Yuji Takazawa

    World Congress of Sports Physical Therapy 2024　2024/06/14

  3. Relationship between dynamic postural control ability and the accuracy of eccentric force control at the ankle

    NOZU Shojiro, TANAKA Tsukasa, INOUE Mika, NISHIO Hirofumi, TAKAZAWA Yuji

    4th Congress, International Academy of Sportology　2024/06/01

  4. Comparison of Sensorimotor Control Strategies between Individuals with/without Chronic Ankle Instability during the Star Excursion Balance Test

    2023 ASICS SMA Conference

  5. THE ACCURACY OF FORCE CONTROL WHILE ANKLE MUSCLE IS LENGTHENING EXPLAINS DYNAMIC BALANCE ABILITY ASSESSED BY A CLINICAL TEST

    The World Physiotherapy Congress 2023

  6. KINETIC CHARACTERISTICS DURING THE SIDE HOP TEST IN ATHLETES WITH CHRONIC ANKLE INSTABILITY

    ONO K, NOZU S, YOSHIDA T, TANIGAWA S

    The 27th Annual Congress of the European College of Sport Science　2022/08/30

  7. Effects of 448 kHz capacitive resistive monopolar radiofrequency of the lumbar region on muscle tissue elasticity

    Taiki Saito, Takayuki Miyamori, Yu Shimasaki, Shojiro Nozu, Masafumi Yoshimura

    The World Congress of Sports Physical Therapy 2022　2022/08/26

  8. Simulated Unstable Ankle Alters Postural Control Strategy during the Star Excursion Balance Test

    Nozu S, Johnson KA, Takazawa Y, Shields RK

    APTA Combined Sections Meeting　2022/02/04

  9. LOWER LIMB KINETIC CHARACTERISTICS OF THE SIDE-HOP TEST IN HEALTHY INDIVIDUALS

    Kyoya Ono, Shojiro Nozu, Takuya Yoshida, Hirohiko Maemura, Satoru Tanigawa

    International Society of Biomechanics in Sports (ISBS) Conference 2021　2021/09/03

  10. Lower Extremity Joint Moments During Posteromedial reach of the Star Excursion Balance Test in Healthy People

    Shojiro Nozu, Kristin A. Johnson, Richard K. Shields

    The International Society of Electrophysiology and Kinesiology (ISEK) Virtual Congress 2020　2020/07/12

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Research Projects 2

  1. 足関節捻挫再発防止のエビデンス構築ー姿勢制御障害に対する介入への挑戦ー

    野津 将時郎

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 若手研究

    Institution: 順天堂大学

    2022/04/01 - 2027/03/31

  2. 足関節捻挫既往者における姿勢制御不全機構の解明ー根拠ある介入法樹立を目指してー

    野津 将時郎

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 研究活動スタート支援

    Institution: 順天堂大学

    2021/08/30 - 2023/03/31

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    本研究は、足関節捻挫リハビリテーションのため、バイオメカニクス解析による臨床テスト（Star Excursion Balance Test：SEBT）を用いた姿勢制御不全機構の解明を目的としている。本研究により、足関節捻挫後の姿勢制御不全機序を量的（SEBTリーチ距離）および質的（動作特徴）に解釈できることを世界で初めて立証するという成果を得ることができる。両解釈による足関節捻挫後の姿勢制御不全に対する新評価法を樹立し、また新評価法での測定結果に基づいた臨床的介入法の立案が学術的創造性となる。足関節捻挫再発予防プログラム開発への発展が学術的波及性となり、リハビリテーション領域の課題である「足関節捻挫再発予防」と足関節捻挫既往者のQOL向上に役立つことが社会的波及性となる。 本研究実施計画と実施状況は以下の通りである。 目標１）バイオメカニクス測定法の確立：SEBT実施時のバイオメカニクス変数を統合的に解析するためのプログラム作成、実験手順を構築する。（完了） 目標２）足関節捻挫既往者の身体重心制御の特徴を解明する：足関節捻挫群と健常群のキネマティクスデータを比較し、仮説である足関節運動と身体重心位置が異なっていることを検証する。（現在解析中、足関節捻挫群のサンプル数が少ないため実験継続中） 目標３）バイオメカニクス変数の統合的解釈：キネマティクスデータ以外のバイオメカニクス変数に関して、探索的な解析を行い、足関節捻挫既往者における姿勢制御の機序を包括的に解明する。（現在解析中）