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Assessment of Gait Parameters Using Wearable Sensors and Their Association With Muscle Mass, Strength, and Physical Performance in Korean Older Adults: Cross-Sectional Study

Assessment of Gait Parameters Using Wearable Sensors and Their Association With Muscle Mass, Strength, and Physical Performance in Korean Older Adults: Cross-Sectional Study

According to the 2019 Asian Working Group for Sarcopenia (AWGS) consensus update, the diagnosis of sarcopenia should be based on changes in muscle strength, physical performance, and muscle mass, with case findings leading to a comprehensive assessment and diagnosis in primary care or community preventive settings [8-10].

Jinyoung Shin, Hyuk Jung Kweon, Jaekyung Choi

JMIR Form Res 2025;9:e63928

Authors’ Reply: Balancing Challenges and Opportunities When Evaluating Remote Rehabilitation for Sarcopenia in Older Adults

Authors’ Reply: Balancing Challenges and Opportunities When Evaluating Remote Rehabilitation for Sarcopenia in Older Adults

Thank you for your reading of our article “A 4-Week Mobile App–Based Telerehabilitation Program vs Conventional In-Person Rehabilitation in Older Adults With Sarcopenia: Randomized Controlled Trial” [1]. We are truly gratified that our study has garnered your attention and interest and has sparked meaningful discussion. In response to the points raised by the authors [2], our answers are as follows.

Lu Zhang, Ying Ge, Wowa Zhao, Xuan Shu, Lin Kang, Qiumei Wang, Ying Liu

J Med Internet Res 2025;27:e73174

Balancing Challenges and Opportunities When Evaluating Remote Rehabilitation for Sarcopenia in Older Adults

Balancing Challenges and Opportunities When Evaluating Remote Rehabilitation for Sarcopenia in Older Adults

Dear Editor: We are writing to share our thoughts on the article “A 4-Week Mobile App–Based Telerehabilitation Program vs Conventional In-Person Rehabilitation in Older Adults With Sarcopenia: Randomized Controlled Trial” [1] published in the Journal of Medical Internet Research. This research presents a significant exploration into the rehabilitation of older adults with sarcopenia, comparing a mobile app–based telerehabilitation approach with traditional in-person rehabilitation.

Hao Zhang, Xiangjie Liu

J Med Internet Res 2025;27:e71845

Using Deep Learning to Perform Automatic Quantitative Measurement of Masseter and Tongue Muscles in Persons With Dementia: Cross-Sectional Study

Using Deep Learning to Perform Automatic Quantitative Measurement of Masseter and Tongue Muscles in Persons With Dementia: Cross-Sectional Study

Age-related muscle wasting and neurodegeneration, clinically presented as sarcopenia and dementia, respectively, are the major drivers of frailty, falls, and disability in older adults worldwide [1]. Sarcopenia is characterized by loss of muscle mass, strength, and function in older adults. Aging is the leading risk factor, but conditions such as chronic diseases, inflammation, sedentarism, and malnutrition promote sarcopenia onset and progression [2].

Mahdi Imani, Miguel G Borda, Sara Vogrin, Erik Meijering, Dag Aarsland, Gustavo Duque

JMIR Aging 2025;8:e63686

Web-Based Exercise and Nutrition Intervention to Improve Leg Muscle Strength and Physical Functioning in Older Adults: Pre-Post Pilot Study

Web-Based Exercise and Nutrition Intervention to Improve Leg Muscle Strength and Physical Functioning in Older Adults: Pre-Post Pilot Study

With advancing age, many people are experiencing sarcopenia. Sarcopenia can be defined as the age-related decline in skeletal muscle mass and function, highlighting the importance of advancing age as a factor of sarcopenia [2]. Sarcopenia is a natural part of the aging process, but its progression can be hastened by several factors, such as inflammation associated with aging (inflammaging), chronic diseases, lack of physical activity, inadequate nutrition, unintentional weight loss, and disuse events [3].

Berber Gijsbertha Dorhout, Nick Wezenbeek, Lisette C P G M de Groot, Pol Grootswagers

JMIR Form Res 2025;9:e54392

A 4-Week Mobile App–Based Telerehabilitation Program vs Conventional In-Person Rehabilitation in Older Adults With Sarcopenia: Randomized Controlled Trial

A 4-Week Mobile App–Based Telerehabilitation Program vs Conventional In-Person Rehabilitation in Older Adults With Sarcopenia: Randomized Controlled Trial

Sarcopenia is characterized by a substantial reduction in skeletal muscle mass and function. This condition heightens the risk of falls, fractures, and physical disability and is closely linked to a poorer quality of life, as well as increased mortality rates [3,4]. According to a systematic review from 2022, the prevalence of sarcopenia worldwide is estimated to be 8%-36% in individuals under the age of 60 years and 10%-27% in those over 60 years [5].

Lu Zhang, Ying Ge, Wowa Zhao, Xuan Shu, Lin Kang, Qiumei Wang, Ying Liu

J Med Internet Res 2025;27:e67846

Skeletal Muscle Mass Loss and Physical Function in Young to Middle-Aged Adult Patients With Diabetes: Cross-Sectional Observational Study

Skeletal Muscle Mass Loss and Physical Function in Young to Middle-Aged Adult Patients With Diabetes: Cross-Sectional Observational Study

According to the AWGS 2019, sarcopenia is defined as a loss of skeletal muscle mass and a loss of muscle strength or physical capacity, while severe sarcopenia is defined as a loss of skeletal muscle mass plus a loss of both muscle strength and physical capacity; moreover, severe sarcopenia is defined as a loss of both muscle strength and physical performance in addition to a loss of skeletal muscle mass.

Aki Naruse, Yuka Yamada, Takeshi Miyamoto

Interact J Med Res 2024;13:e58038

Quantifying the Enhancement of Sarcopenic Skeletal Muscle Preservation Through a Hybrid Exercise Program: Randomized Controlled Trial

Quantifying the Enhancement of Sarcopenic Skeletal Muscle Preservation Through a Hybrid Exercise Program: Randomized Controlled Trial

Sarcopenia is also an objective indicator of cancer cachexia [12] and is associated with suboptimal surgical postoperative outcomes [13], lower survival [12,14], and toxic counteraction [15-17]. Mortality rates nearly double when sarcopenia is combined with inflammation [18]. Therefore, addressing the serious health issues of older people with sarcopenia is imperative.

Hongzhi Guo, Jianwei Cao, Shichun He, Meiqi Wei, Deyu Meng, Ichen Yu, Ziyi Wang, Xinyi Chang, Guang Yang, Ziheng Wang

JMIR Aging 2024;7:e58175

Identifying and Estimating Frailty Phenotypes by Vocal Biomarkers: Cross-Sectional Study

Identifying and Estimating Frailty Phenotypes by Vocal Biomarkers: Cross-Sectional Study

Recent research has examined several physical frailty scales with overlapping components and has distinguished these components into 2 groups: energy-based frailty (EBF) and sarcopenia-based frailty (SBF). This indicates that dietary sodium restriction is associated with a significantly increased risk of SBF, suggesting a potential pathway linking dietary sodium restriction, poor appetite, compromised nutritional status, and SBF in older adults.

Yu-Chun Lin, Huang-Ting Yan, Chih-Hsueh Lin, Hen-Hong Chang

J Med Internet Res 2024;26:e58466

Assessing the Clinical Effectiveness of an Exergame-Based Exercise Training Program Using Ring Fit Adventure to Prevent and Postpone Frailty and Sarcopenia Among Older Adults in Rural Long-Term Care Facilities: Randomized Controlled Trial

Assessing the Clinical Effectiveness of an Exergame-Based Exercise Training Program Using Ring Fit Adventure to Prevent and Postpone Frailty and Sarcopenia Among Older Adults in Rural Long-Term Care Facilities: Randomized Controlled Trial

This contributes to sarcopenia, a gradual decline in muscle mass, strength, and physical performance that occurs as individuals age [4], as well as frailty, a state of heightened vulnerability due to the decline in the reserve and function of multiple physiological systems [4]. Frailty and sarcopenia are significant concerns globally, profoundly influencing older adults’ physical capabilities, health risks, quality of life, and longevity [5,6].

Sheng-Hui Tuan, Lin-Hui Chang, Shu-Fen Sun, Chien-Hui Li, Guan-Bo Chen, Yi-Ju Tsai

J Med Internet Res 2024;26:e59468