Evaluation of exercise tolerance with low-intensity exercise using wearable devices

2023 Fiscal Year Final Research Report

• Project/Area Number: 21K12787
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 90150:Medical assistive technology-related
• Research Institution: Okayama University
• Principal Investigator: MORITA Mizuki 岡山大学, ヘルスシステム統合科学学域, 教授 (00519316)
• Co-Investigator(Kenkyū-buntansha): 頼 冠名 岡山大学, 大学病院, 講師 (40729092) ; 森本 美智子 岡山大学, 保健学研究科, 教授 (50335593)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: デジタルバイオマーカー / ウェアラブル機器 / 行動識別 / 加速度計 / パルスオキシメータ / 機械学習

Outline of Final Research Achievements

In this study, two major experiments were conducted. The first result showed that the subject's physical fitness could be estimated by analyzing the changes in heart rate and oxygen saturation immediately after the cessation of an action or exercise. The main point of this result is that strong exercise is not necessary, and estimation is possible even with moderate-intensity action/exercise. The second result is that the type of activity/exercise can be estimated with high accuracy using data obtained from a wearable device attached to the wrist or chest. The main point of this result is that the type of behavior/exercise includes not only walking and running, but also disease-related behavior/exercise such as activities that tend to cause shortness of breath in patients (e.g., changing clothes, brushing teeth, etc.).

Free Research Field

医用工学

Academic Significance and Societal Importance of the Research Achievements

センサの小型化やバッテリの長寿命化などによってウェアラブル機器で測定できる項目が増え，さらにスマートフォンの普及によりこれらのセンサを日常的に装着している人が増えた。今後，疾患の管理にウェアラブル機器を活用する機会が増えると期待できる。本研究により，慢性閉塞性肺疾患（COPD）などの疾患において，日常生活の中で患者本人や医療従事者が患者の状態をモニタリングおよび管理できるようになることにつながる成果が得られた。