Abstract
Background
Inclusion Body Myositis (IBM), a progressive neuromuscular disorder, is characterized by quadriceps and ankle muscle weakness, leading to impaired balance control and increased fall risk during functional activities. Existing research highlights inconsistent evidence on fall risk reduction and a lack of standardized rehabilitation protocols, creating gaps in effective management. This systematic review aims to synthesize evidence on the impact of muscle weakness on balance and fall risk and evaluate rehabilitation strategies, including task-specific interventions, to improve functional outcomes in IBM patients.
Methods
Following PRISMA guidelines, we conducted a systematic search of MEDLINE, Embase, and the Cochrane Library from inception to March 2025, using keywords such as “IBM,” “muscle weakness,” and “rehabilitation.” Two reviewers independently screened studies assessing balance-related movement characteristics and rehabilitation strategies (e.g., resistance training, NMES, functional exercises). Quality and bias risk were assessed using Cochrane Risk of Bias 2 and ROBINS-I tools, with evidence certainty evaluated via the GRADE approach.
Results
Of 1425 articles screened, 22 were selected for analysis. Quadriceps weakness, particularly in knee extensor eccentric control, impairs balance during sit-to-stand (STS), stand-to-sit (StandTS), walking, and stair activities, significantly increasing fall risk (moderate evidence). Ankle dorsiflexor weakness exacerbates this by causing foot drop and disrupting force transfer (moderate evidence). Rehabilitation interventions, including resistance training and NMES, show moderate evidence of improving muscle strength and functional capacity, while task-specific STS and StandTS training offer moderate promises for mobility.
Conclusions
Impaired knee extensor control, ankle dorsiflexor weakness, and poor leg joint coordination are key contributors to balance deficits and fall risk in IBM. Moderate evidence supports resistance training and STS/StandTS exercises for improving strength and functional capacity, though consistent fall risk reduction has not been established. Tailored, multifaceted rehabilitation, potentially including emerging strategies such as STS/StandTS, and walking, appears most promising. Large-scale, high-quality studies are needed to refine interventions, validate lower-evidence approaches, and establish standardized protocols to optimize safety and functional outcomes in IBM.
Description
© The Author(s) 2026. Open Access This article is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License, which permits any non-commercial use, sharing, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if you modified the licensed material. You do not have permission under this licence to share adapted material derived from this article or parts of it. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by-nc-nd/4.0/
Publisher
Springer
Date of publication
2026
Language
english
Persistent identifier
http://hdl.handle.net/10950/5164
Document Type
Article
Recommended Citation
Jeon, Woohyoung; Dalby, Ashley; Hermanns, Melinda; and Lubinus, Manuel, "Quadriceps and ankle weakness in inclusion body myositis: impact on descending balance control and rehabilitation strategies - a systematic review" (2026). Nursing Faculty Publications and Presentations. Paper 65.
http://hdl.handle.net/10950/5164