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The Journal of orthopaedic and sports physical therapy

Portable Dynamometry Is Reliable for Measuring Knee and Ankle Strength in Daily Practice: Results From a Systematic Review With Meta-analysis and Evidence Gap Map Using the COSMIN Methodology

2 de octubre de 2026Investigación original1 min de lectura

Por Gajardo-Burgos R, Jaque de la Barra T, Ramírez-Campillo R y 2 más.

Contenido en inglés

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Resumen
Palabras clave
Autores
Fuente

Resumen

Objective

To estimate the reliability and criterion validity of knee and ankle muscle strength measured using portable dynamometers.

Design

Systematic review with meta-analysis and evidence gap map.

Literature search

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Systematic search of MEDLINE, Embase, CINAHL, SPORTDiscus, and Web of Science from inception to April 2025.

Study selection criteria

We included studies that evaluated reliability or criterion validity of portable dynamometers for measuring knee extensor/flexor or ankle dorsiflexor/plantarflexor/invertor/evertor isometric strength in uninjured people or people with a lower-limb musculoskeletal condition.

Data synthesis

We performed meta-analyses for each muscle group, position, and fixation method. Methodological quality was assessed using the COSMIN (COnsensus-based Standards for the selection of health Measurement INstruments) Risk of Bias tool. Certainty of evidence was graded using a modified GRADE (Grading of Recommendations Assessment, Development and Evaluations) approach.

Results

We included 123 studies (n = 5042 participants); 113 studies were included in the meta-analysis. There was moderate- to high-certainty evidence of sufficient reliability (intraclass correlation coefficient ≥ 0.70) across most muscle groups, positions, and fixation methods. High-certainty evidence supported external fixation for assessing knee extensors/flexors and ankle plantarflexors. Evidence for criterion validity was sparse, and the certainty of evidence ranged from very low to high. There was high-certainty evidence of sufficient validity for knee extensor and flexor strength with external fixation in seated positions (r = 0.82-0.90).

Conclusion

Portable dynamometers were sufficiently reliable for measuring isometric knee and ankle strength in clinical practice. The evidence for criterion validity was limited. Portable dynamometers should not yet be considered direct substitutes for isokinetic dynamometry. Reliability and validity estimates were consistent across uninjured and clinical populations. J Orthop Sports Phys Ther 2026;56(10):657-671. Epub 7 Jul 2026. doi:10.2519/jospt.2026.14091.

Palabras clave

Humans
Muscle Strength
Reproducibility of Results
Muscle Strength Dynamometer
Ankle
Knee
Muscle, Skeletal

Autores

Gajardo-Burgos R
Jaque de la Barra T
Ramírez-Campillo R
Waiteman MC
Sáez de Villarreal E

Fuente

Publicado en The Journal of orthopaedic and sports physical therapy. El resumen se muestra tal como se publicó y sigue siendo obra de sus autores; lee el artículo completo en la fuente.

pubmed.ncbi.nlm.nih.gov/42823646/

Prognia recoge este artículo como referencia y para la formación. No es consejo médico. Lee siempre el original y sigue las guías vigentes y los protocolos locales antes de actuar.

De un vistazo

Revista: The Journal of orthopaedic and sports physical therapy
Tipo: Investigación original
Publicado: 2 de octubre de 2026
Especialidad: Neumología
Tiempo de lectura: 1 min
Autores: 5
DOI: 10.2519/jospt.2026.14091
PubMed: 42823646

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