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Systemic Inflammation and Disruption of the Local Microenvironment Compromise Muscle Regeneration: Critical Pathogenesis of Autoimmune-Associated Sarcopenia

Systemic Inflammation and Disruption of the Local Microenvironment Compromise Muscle Regeneration: Critical Pathogenesis of Autoimmune-Associated Sarcopenia

However, the exact cause of primary sarcopenia is not fully understood yet. Recent studies suggested that cellular aging [7], mitochondrial disorder [8], decreased physical activity [9], and excessive caloric intake could accelerate the progression of sarcopenia. Moreover, an imbalance of oxygen in the body may contribute to the development of sarcopenia as well [10]. Sarcopenia afflicts not only the older people but also the patients with immune diseases.

Yingjuan Zhang, Qingqian Wu, Yi Wang, Qingyan Chen, Shuang Han, Bei Li, Qingwen Zhao, Qianzhuo Wang, Yule Wang, Yue Gao

Interact J Med Res 2025;14:e64456

Diagnosis of Sarcopenia Using Convolutional Neural Network Models Based on Muscle Ultrasound Images: Prospective Multicenter Study

Diagnosis of Sarcopenia Using Convolutional Neural Network Models Based on Muscle Ultrasound Images: Prospective Multicenter Study

Sarcopenia significantly influences the secretion and metabolism of the body, such as glucose, glycogen, and lipid metabolism, as well as the secretion of a variety of cytokines [5]. Therefore, clinical data from laboratory information may provide supplementary information for the diagnosis of sarcopenia. Besides the metabolic changes, the pathogenesis of sarcopenia primarily encompasses fiber loss, atrophy, and increased infiltration of adipose and connective tissue [6,7].

Zi-Tong Chen, Xiao-Long Li, Feng-Shan Jin, Yi-Lei Shi, Lei Zhang, Hao-Hao Yin, Yu-Li Zhu, Xin-Yi Tang, Xi-Yuan Lin, Bei-Lei Lu, Qun Wang, Li-Ping Sun, Xiao-Xiang Zhu, Li Qiu, Hui-Xiong Xu, Le-Hang Guo

J Med Internet Res 2025;27:e70545

An In-Person and Online Intervention for Parkinson Disease (UPGRADE-PD): Protocol for a Patient-Centered and Culturally Tailored 3-Arm Crossover Trial

An In-Person and Online Intervention for Parkinson Disease (UPGRADE-PD): Protocol for a Patient-Centered and Culturally Tailored 3-Arm Crossover Trial

Sarcopenia Sarcopenia risk will be assessed before and after each research period by the change of total score of the Greek version [110] of Strength, Assistance in walking, Rise from a chair, Climb stairs, and Falls Scale [111], which is a 0 to 10 self-reporting screening tool of five 0- to 2-point components (strength, assistance walking, rise from a chair, climb stairs, and number of falls) with 0 to 3 indicating no risk for sarcopenia, and ≥4 indicating risk of sarcopenia.

Michail Elpidoforou, Irene Grimani, Marianna Papadopoulou, Nikolaos Papagiannakis, Anastasia Bougea, Athina-Maria Simitsi, Evangelos Sfikas, Ioanna Alexandratou, Ioanna Alefanti, Roubina Antonelou, Christos Koros, Ioanna Mavroyianni, Chrysa Chrysovitsanou, Leonidas Stefanis, Daphne Bakalidou

JMIR Res Protoc 2025;14:e65490

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