{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,30]],"date-time":"2026-06-30T17:47:49Z","timestamp":1782841669617,"version":"3.54.5"},"reference-count":86,"publisher":"JMIR Publications Inc.","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J Med Internet Res"],"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:sec sec-type=\"background\">\n                    <jats:title>Background<\/jats:title>\n                    <jats:p>Frailty and sarcopenia represent substantial global health challenges, frequently diminishing patients\u2019 quality of life through impaired muscle function and physical performance. Digital health interventions (DHIs) have shown promise in mitigating these conditions among older adults. However, outcomes of such interventions in this demographic are inconsistent, and a thorough synthesis of existing evidence is lacking.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec sec-type=\"objective\">\n                    <jats:title>Objective<\/jats:title>\n                    <jats:p>This study aimed to evaluate the effectiveness of DHIs in older adults with frailty and sarcopenia.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec sec-type=\"methods\">\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>A comprehensive search of PubMed, Web of Science, MEDLINE, Embase, and Cochrane Library was conducted from their inception until January 2026 to identify randomized controlled trials. Meta-analyses were performed using R software (R Foundation for Statistical Computing). Study quality was evaluated using the revised Cochrane Risk of Bias Tool 2.0 (Cochrane Collaboration), and evidence certainty was assessed using GRADE (Grading of Recommendations, Assessment, Development, and Evaluation).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec sec-type=\"results\">\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      From 3506 records, 16 studies were included. DHIs significantly improved total skeletal muscle mass (weighted mean difference [WMD] 1.01, 95% CI 0.08-1.94, 95% prediction interval [PI] \u22120.95 to 2.96), gait speed (WMD 0.09, 95% CI 0.03-0.15, 95% PI \u22120.1 to 0.26), Timed Up and Go Test (TUGT: WMD \u22120.52, 95% CI \u22121.02 to \u22120.03, 95% PI \u22121.93 to 0.85), 30-second Chair Stand Test (30CST: WMD 2.19, 95% CI 0.89-3.48, 95% PI \u22121.59 to 5.66), balance (standardized mean difference [SMD] 0.61, 95% CI 0-1.21, 95% PI \u22120.94 to 2.13), and quality of life (SMD 0.16, 95% CI 0.05-0.27, 95% PI 0.04-0.28). No significant improvements were observed in Appendicular Skeletal Muscle Mass Index (ASMI), grip strength, 6-minute walk test (6MWT), 2-minute walk test (2MWT), Short Physical Performance Battery (SPPB), or BMI. Although the pooled effect was favorable, the wide 95% PI suggests substantial between-study heterogeneity. Subgroup analysis stratified by intervention duration revealed significant intersubgroup differences in ASMI (\n                      <jats:italic>\u03c7<\/jats:italic>\n                      \u00b2\n                      <jats:sub>\u2081<\/jats:sub>\n                      =9.93;\n                      <jats:italic>P<\/jats:italic>\n                      =.0016), indicating interventions lasting \u226512 weeks were more effective for improving ASMI (WMD 0.28, 95% CI 0.06-0.50, 95% PI \u22120.30 to 0.83). Subgroup analysis stratified by intervention type showed significant intersubgroup differences in balance (\n                      <jats:italic>\u03c7<\/jats:italic>\n                      \u00b2\n                      <jats:sub>\u2083<\/jats:sub>\n                      =9.89;\n                      <jats:italic>P<\/jats:italic>\n                      =.0195), with exergame-based interventions showing significant effects (SMD 0.83, 95% CI 0.26-1.40).\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec sec-type=\"conclusions\">\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>This systematic review is the first to quantify the disease-specific efficacy of DHIs in improving muscle function, physical performance, and quality of life among older adults with frailty and sarcopenia, demonstrating their unique value as a scalable complementary approach. By overcoming geographical and resource constraints, DHIs support underserved populations. However, low evidence quality and heterogeneity warrant cautious interpretation. The 95% PIs indicate that actual effects may vary with population characteristics and implementation contexts. Nonetheless, DHIs represent a promising and cost-effective strategy for service expansion. Future high-quality studies are needed to better understand their effectiveness and implementation across settings.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.2196\/88374","type":"journal-article","created":{"date-parts":[[2026,3,23]],"date-time":"2026-03-23T07:30:05Z","timestamp":1774251005000},"page":"e88374-e88374","source":"Crossref","is-referenced-by-count":0,"title":["Effectiveness of Digital Health Interventions in Older Adults With Frailty and Sarcopenia: Systematic Review and Meta\u2010Analysis of Randomized Controlled 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