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Affiliation |
Graduate School of Medicine Doctorial Course in Medicine Public Health and Environmental Medicine Department of Environmental health science and Public Health |
IWAKURA Masahiro
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Research Interests 【 display / non-display 】
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Pulmonary Rehabilitation
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Perioperative Rehabilitation
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Cancer Rehabilitation
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COPD
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Frailty・Sarcopenia
Graduating School 【 display / non-display 】
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-2014.03
Akita University Faculty of Medicine Graduated
Graduate School 【 display / non-display 】
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-2019.03
Akita University Graduate School, Division of Medicine Doctor's Degree Program Completed
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-2016.03
Akita University Graduate School, Division of Medicine Master's Degree Program Completed
Campus Career 【 display / non-display 】
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2023.09-Now
Akita University Graduate School of Medicine Doctorial Course in Medicine Public Health and Environmental Medicine Department of Environmental health science and Public Health Assistant Professor
External Career 【 display / non-display 】
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2022.04
Akita Rehabilitation Core Academy, School Corporation Part-time lecturer
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2019.01
Tokyo Metropolitan Geriatric Hospital and Institute of Gerontology
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2014.04-2023.08
Akita City Hospital Department of Physical Therapy Physical Therapist
Research Areas 【 display / non-display 】
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Life Science / Nutrition science and health science
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Life Science / Hygiene and public health (non-laboratory)
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Life Science / Hygiene and public health (non-laboratory)
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Life Science / Nutrition science and health science
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Life Science / Rehabilitation science
Research Achievements 【 display / non-display 】
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An umbrella review of efficacy of digital health interventions for workers
Iwakura M.
Npj Digital Medicine ( Npj Digital Medicine ) 8 ( 1 ) 2025.12 [Refereed]
Research paper (journal) Domestic Co-author
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Co-occurrence of Whole-body Muscle Wasting and Respiratory Muscle Weakness Affecting the Clinical Characteristics of Patients with Chronic Obstructive Pulmonary Disease
KAWAGOSHI Atsuyoshi, IWAKURA Masahiro, FURUKAWA Yutaka, KERA Takeshi, KAWAI Hisashi, OBUCHI Shuichi, SUGAWARA Keiyu, SHIOYA Takanobu
Physical Therapy Research ( 一般社団法人日本理学療法学会連合 ) advpub ( 0 ) 2025 [Refereed]
Research paper (journal) Domestic Co-author
<p>Objectives: The effect of the co-occurrence of whole-body muscle wasting and respiratory muscle weakness on the clinical characteristics of patients with chronic obstructive pulmonary disease (COPD) is unclear. We investigated this association in patients with chronic respiratory diseases. Methods: 47 outpatients with mild to very severe COPD were classified into four groups according to their fat-free mass index and respiratory muscle strength: 19 without muscle wasting and respiratory muscle weakness (normal), 6 with muscle wasting only (MW), 11 with respiratory weakness only (RW), and 11 with muscle wasting and respiratory weakness (MW + RW). We measured their body composition, pulmonary function, lower muscle strength, submaximal exercise capacity, physical activity in daily life, nutritional status, frailty status, and health-related quality of life (QOL). Multiple linear regression analyses examined the association of muscle wasting and/or respiratory muscle weakness with participant characteristics, using each participant’s characteristics as an explained variable adjusted for confounding variables (Normal as the reference). Results: The regression analysis revealed that the percentage of vital capacity, lower muscle strength, submaximal exercise capacity, nutritional status, and frailty status were worse in the MW + RW group than in the Normal group. The MR + RW group had the largest number of variables with significant differences compared to the Normal group. Conclusions: These data suggest that the co-occurrence of whole-body muscle wasting and respiratory muscle weakness was significantly associated with deteriorating clinical characteristics in patients with COPD.</p>
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Iwakura M.
European Journal of Oncology Nursing ( European Journal of Oncology Nursing ) 67 102461 - 102461 2023.12 [Refereed]
Research paper (journal)
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Iwakura M.
European Respiratory Review ( European Respiratory Review ) 32 ( 169 ) 220165 2023.09 [Refereed]
Research paper (journal) International Co-author
BACKGROUND: Physical activity (PA) measurements are becoming common in interstitial lung disease (ILD); however, standardisation has not been achieved. We aimed to systematically review PA measurement methods, present PA levels and provide practical recommendations on PA measurement in ILD. METHODS: We searched four databases up to November 2022 for studies assessing PA in ILD. We collected information about the studies and participants, the methods used to measure PA, and the PA metrics. Studies were scored using 12 items regarding PA measurements to evaluate the reporting quality of activity monitor use. RESULTS: In 40 of the included studies, PA was measured using various devices or questionnaires with numerous metrics. Of the 33 studies that utilised activity monitors, a median of five out of 12 items were not reported, with the definition of nonwear time being the most frequently omitted. The meta-analyses showed that the pooled means (95% CI) of steps, time spent in moderate to vigorous PA, total energy expenditure and sedentary time were 5215 (4640-5791) steps·day-1, 82 (58-106) min·day-1, 2130 (1847-2412) kcal·day-1 and 605 (323-887) min·day-1, respectively, with considerable heterogeneity. CONCLUSION: The use of activity monitors and questionnaires in ILD lacks consistency. Improvement is required in the reporting quality of PA measurement methods using activity monitors.
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Iwakura M.
Journal of Geriatric Oncology ( Journal of Geriatric Oncology ) 14 ( 2 ) 101422 - 101422 2023.03 [Refereed]
Research paper (journal)
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Gait-related Self-efficacy is Low in Older Adults with Knee Osteoarthritis: A Preliminary Study
OKURA Kazuki, SHIBATA Kazuyuki, SUDA Tomohiro, IWAKURA Masahiro, WAKASA Masahiko, KIMURA Yoshiaki, OKADA Kyoji
Physical Therapy Research ( 一般社団法人日本理学療法学会連合 ) 25 ( 1 ) 31 - 34 2022.04 [Refereed]
<p>Objective: To investigate the differences in self-efficacy (SE) for walking tasks between older patients with knee osteoarthritis (OA) and older adults without knee OA. Methods: A cross-sectional design was employed. Older patients with radiographic knee OA and community-dwelling older adults without knee OA as controls were enrolled in the study. SE for the walking task was assessed using the modified gait efficacy scale (mGES). A Wilcoxon rank-sum test was used to compare the mGES between the groups of participants. A Tobit regression model was used to estimate the difference in mGES. The presence of radiographic knee OA was used as an independent variable. Sex (women), age, and body mass index were used as potential confounding variables in the model. Results: After exclusion, 78 participants (n=40 with knee OA, n=38 controls) were included. The mGES was lower in patients with knee OA than in controls. In the Tobit regression model adjusted for confounding factors, mGES in patients with knee OA was estimated to be 26.8 (95% confidence interval [CI]: 15.8-37.8) points lower than in controls. Conclusion: This study demonstrated that mGES was lower in older patients with knee OA than in older adults without knee OA.</p>
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Recent Advances in Inspiratory Muscle Training:
SHIOYA Takanobu, KAGAYA Yuki, TERUI Yoshino, OKURA Kazuki, IWAKURA Masahiro, KAWAGOSHI Atsuyoshi
Journal of Clinical Physiology ( Japanese Society of Clinical Physiology ) 52 ( 1 ) 11 - 17 2022.02
<p> Inspiratory Muscle Training (IMT) can be defined as a technique that aims to improve the function of the respiratory muscles through specific devices. IMT has been shown to improve respiratory muscle strength and exercise endurance, and health related QOL and IMT also has been shown to reduce dyspnea on exertion. Recently, the benefits of IMT have been demonstrated in patients with heart failure (HF), respiratory management in ICU, preoperative period, and cerebrovascular disease.</p><p> The pathologic changes that occur in the lung as a consequence of chronic pulmonar y venous hypertension, pulmonary function test abnormalities, and potential mechanisms for dyspnea including airflow obstruction and/or respiratory muscle dysfunction are discussed. It is worth noting that muscle weakness appears first in the respiratory muscles and then in the musculature of the limbs, which may be considered one of the main causes of exercise intolerance. IMT seems to be a useful intervention to reduce inspiratory muscle metaboreflex in order to increase patients' exercise tolerance under HF condition.</p><p> A systematic review was necessary to review the effects of IMT on inspiratory muscle weakness. For people with heart failure, IMT by itself, without being combined with other exercise, can improve ease of breathing, increase the amount of distance that they can walk, and improve quality of life. Inspirator y training with higher loads might be helpful for those with respiratory muscle weakness who are unable to do conventional exercise. In this review, new devices for IMT those recently developed and the working mechanism are shown. Further research should be warranted for IMT in the patients with HF and other disease than respiratory diseases.</p>
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Kawagoshi Atsuyoshi, Furukawa Yutaka, Iwakura Masahiro, Okura Kazuki, Sugawara Keiyu, Takahashi Hitomi, Shioya Takanobu
The Journal of the Japan Society for Respiratory Care and Rehabilitation ( The Japan Society for Respiratory Care and Rehabilitation ) 30 ( 1 ) 59 - 64 2021.12
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How to Interpret Muscle Weakness: an Example of Quadriceps Femoris Muscle Strength Assessment in a Patient with Chronic Obstructive Pulmonary Disease
岩倉正浩
秋田理学療法 28 ( 1 ) 33 - 36 2021
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Efficacy of a interval training for inspiratory muscle in healthy young people
Kubota Mika, Satake Masahiro, Iwakura Masaharu, Furukawa Yutaka, Sugawara Keiyu, Takahashi Hitomi, Shioya Takanobu
The Journal of the Japan Society for Respiratory Care and Rehabilitation ( The Japan Society for Respiratory Care and Rehabilitation ) 29 ( 2 ) 292 - 298 2020.12
◆Original paper【 display / non-display 】
◆Other【 display / non-display 】
Grant-in-Aid for Scientific Research 【 display / non-display 】
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Clinically important difference in muscle strength and physical function in patients with abdominal tumors undergoing surgery
Grant-in-Aid for Early-Career Scientists
Project Year： 2024.04 - 2027.03
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Grant-in-Aid for Research Activity start-up
Project Year： 2019.08 - 2023.03
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Grant-in-Aid for Research Activity start-up
Project Year： 2019.08 - 2023.03
Academic Activity 【 display / non-display 】
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2023.04-Now
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2022.07-Now
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2022.06-Now
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2021.04-Now
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2020-2021