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Over time, various methods have been developed for measuring frailty, including clinical judgment, the frailty index, the clinical frailty scale, and the comprehensive geriatric assessment. These traditional frailty assessment approaches rely on healthcare professionals, which can lead to inaccuracy and require frequent clinic visits, making it burdensome for elderly patients. This review paper explores the latest trends in frailty assessment by measuring gait parameters using wearable sensors, specifically the inertial measurement unit (IMU). The aim of this study is to provide a comprehensive overview of objective methods for evaluating and quantifying frailty. We focus on the application of machine learning (ML) and deep learning (DL) techniques to IMU gait data, highlighting key aspects of recent publications such as algorithms, sensor types, sample sizes, and performance evaluations. By examining the strengths and challenges of each technique, this review aims to guide future studies on utilizing cost\u2010effective and portable devices integrated with clinical data. This integration can help to propose optimized IMU gait parameters or ML models to detect early\u2010stage frailty. This advances the emerging trend of intelligent, individualized, and efficient healthcare systems for older adults.<\/jats:p>This article is categorized under:\nApplication Areas > Health Care<\/jats:p><\/jats:list-item>\nTechnologies > Machine Learning<\/jats:p><\/jats:list-item>\nTechnologies > Artificial Intelligence<\/jats:p><\/jats:list-item>\n<\/jats:list><\/jats:p>","DOI":"10.1002\/widm.1557","type":"journal-article","created":{"date-parts":[[2024,8,13]],"date-time":"2024-08-13T11:59:20Z","timestamp":1723550360000},"update-policy":"http:\/\/dx.doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["The evolution of frailty assessment using inertial measurement sensor\u2010based gait parameter measurements: A detailed analysis"],"prefix":"10.1002","volume":"14","author":[{"ORCID":"http:\/\/orcid.org\/0000-0002-6711-4382","authenticated-orcid":false,"given":"Arslan","family":"Amjad","sequence":"first","affiliation":[{"name":"Department of 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