Inter-rater reliability of a new instrument for measuring isometric strength of toe flexor muscle
DOI:
https://doi.org/10.11606/issn.2317-0190.v31i1a216209Keywords:
Foot, Muscle strength, Muscles, Technological DevelopmentAbstract
The assessment of toe flexor muscle strength is an important factor in the analysis of the muscles that contribute to sustaining the longitudinal plantar arch. Intrinsic muscles have several functions such as providing support and stabilization to the arches of the foot, shock absorption, and rigidity for the transmission of forces and postural stability. Objective: To evaluate the reliability of a device to measure the isometric strength of the toe flexor muscles individually. Method: Methodological study with a quantitative approach to assess the reliability of the instrument for evaluating the maximum voluntary isometric strength of the flexor muscles of the toes individually. 20 feet of healthy volunteers were evaluated in two moments: initial evaluation performed by evaluator 1 and evaluation after one week performed by evaluator 2, to test the interclass reliability through the statistical test of Intraclass Correlation Coefficient (ICC). Results: The results showed excellent ICC in all toes with values ranging between 0.805 and 0.921. Toe 4 had the lowest standard error of measurement (SME) and minimal detectable change (MMD), demonstrating lower collection error and greater sensitivity. Conclusion: The proposed instrument is reliable for measuring the intrinsic flexor muscle strength of the foot, being an alternative for evaluating it in different populations, as it presents good reliability and reproducibility at an affordable cost, and can be used in future clinical studies and clinical practice.
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