Neuromuscular characteristics of dynamic balance control in patients with sarcopenia: a combined analysis of surface electromyography and limits of stability.
Introduction: Sarcopenia is a major risk factor for falls in older adults; however, the neuromuscular characteristics underlying dynamic balance deficits remain poorly understood. Objective: This study aimed to investigate balance performance and relative muscle contribution patterns in older adults...
| Publicado en: | Frontiers in Aging Neuroscience pp. 1 - 13 |
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| Autores principales: | , , , , |
| Formato: | equations & formulas pictorial research tables/charts Journal Article |
| Publicado: |
Frontiers Media S.A.
2026
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=195552001&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 195552001 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 16634365 BG2U jtl: Frontiers in Aging Neuroscience issn: 16634365 maglogo: N pubinfo: dt: 2026 pid: 40038 pub: Frontiers Media S.A. artinfo: ui: 195552001 195552001 195552001 10.3389/fnagi.2026.1835815 195552001 ppf: 1 ppct: 12 formats: tig: atl: Neuromuscular characteristics of dynamic balance control in patients with sarcopenia: a combined analysis of surface electromyography and limits of stability. aug: au: Wang, Jingchun Zhang, Ting Qian, Qian Shan, Wenpeng Xiang, Jie affil: School of Medical Technology, Xuzhou Medical University, Xuzhou, China sug: subj: Balance, Postural Evaluation Muscle, Skeletal Physiopathology Sarcopenia Physiopathology Task Performance and Analysis Human Aged Biomechanics Electromyography Lower Extremity Physiopathology Dominance, Cerebral Signal Processing, Computer Assisted Algorithms Probability Data Analysis Software T-Tests Chi Square Test Fisher's Exact Test Two-Way Analysis of Variance Repeated Measures Post Hoc Analysis Mann-Whitney U Test Two-Tailed Test Grip Strength Evaluation Muscle Strength Evaluation Electrophysiology Experimental Studies Funding Source Aged: 65+ years ab: Introduction: Sarcopenia is a major risk factor for falls in older adults; however, the neuromuscular characteristics underlying dynamic balance deficits remain poorly understood. Objective: This study aimed to investigate balance performance and relative muscle contribution patterns in older adults with sarcopenia during dynamic limits of stability (LOS) tasks. Methods: Twenty-seven right-dominant older adults with sarcopenia and 27 age-matched non-sarcopenic controls were recruited. LOS tasks were performed using a force platform, while surface electromyography (sEMG) was recorded bilaterally from 10 lower-limb muscles. Amplitude contribution ratio (ACR), load bias ratio (LR), asymmetry index (AI), and Shannon entropy were analyzed. Results: The sarcopenia group exhibited reduced LOS performance across all directions, with greater impairment in the backward direction. LR-left was lower, whereas forward and backward AI values were higher in the sarcopenia group. Repeated-measures analyses revealed significant group effects for LR and AI, without significant direction-related interactions. ACR analysis showed a significant interaction among direction, muscle region, and group. Post hoc analyses indicated increased proximal and decreased distal relative muscle contributions only during the forward task. Shannon entropy was lower in the sarcopenia group. Conclusion: Older adults with sarcopenia exhibited direction-dependent impairments in dynamic balance performance, accompanied by altered proximal-to-distal relative muscle contribution patterns, asymmetric bilateral contribution distribution, and reduced diversity of muscle recruitment patterns. LR, AI, and Shannon entropy may serve as exploratory indices for characterizing relative muscle coordination during dynamic balance tasks and may provide additional insights for the assessment and rehabilitation of sarcopenia-related balance impairments. pubtype: Academic Journal doctype: equations & formulas pictorial research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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