Bilateral lower-limb asymmetry and phase-specific trunk acceleration during the Timed Up and Go in older women: an analysis based on muscle morphology and antagonist coactivation.

Danming Xu, Hongqin Xu, Xin Zhang, Ming Li, Xiangwei Meng

Abstract read

In one paragraph

Article in Frontiers in physiology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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1 · What the graph read from it

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5 · Who and what money

Authors and funding

5 authors.

Danming XuSchool of Art and Sciences, Chengdu College of University of Electronic Science and Technology of China, Chengdu, China.

Hongqin XuSchool of Sports and Health, Guizhou Medical University, Guiyang, China.

Xin ZhangSchool of Sports and Health, Guizhou Medical University, Guiyang, China.

Ming LiCollege of Education and Sports Sciences, Yangtze University, Jingzhou, China.

Xiangwei MengSchool of Sports and Health, Guizhou Medical University, Guiyang, China.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The Timed Up and Go (TUG) test is widely used to assess mobility and fall risk in older adults, but total completion time does not capture phase-specific motor control. This study quantified bilateral lower-limb asymmetry in muscle morphology and neuromuscular control and examined its association with phase-specific trunk acceleration during the TUG. Twenty-seven healthy older women (78.96 ± 2.44 years) participated. Bilateral muscle thickness was measured by B-mode ultrasound, and bilateral surface electromyography and L4 trunk acceleration were recorded during a five-phase instrumented TUG. Mean and peak coactivation index (CCI) and asymmetry index (ASI) of the knee (QUAD-BF) and ankle (TA-MG) muscle pairs, together with anteroposterior and mediolateral trunk acceleration RMS (RMS

Indexed as

antagonist coactivationfall riskmuscle thicknessroot mean square of accelerationTimed Up and Go

Identifiers

PMID42889991

DOI10.3389/fphys.2026.1915589

PMCPMC13671921

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.