• Clinics · Jan 2022

    Influence of invertor and evertor muscle fatigue on functional jump tests and postural control: A prospective cross-sectional study.

    • Gabriela Borin Castillo, Guilherme Carlos Brech, Nátalia Mariana Silva Luna, Fernanda Botta Tarallo, Jose Maria Soares-Junior, Edmund Chada Baracat, Angelica Castilho Alonso, and Júlia Maria D'Andréa Greve.
    • Laboratório de Estudos do Movimento, Instituto de Ortopedia e Traumatologia (IOT), Hospital das Clínicas HCFMUSP, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brazil.
    • Clinics (Sao Paulo). 2022 Jan 1; 77: 100011.

    ObjectiveFatigue of the ankle's stabilizing muscles may influence the performance of functional activities and postural control. The purpose of this study was to evaluate the performance of healthy young adults using functional jump tests and static posturography control under pre- and post-fatigue conditions of the ankle invertor and evertor muscles.MethodsThirty physically active healthy male and female (15 male and 15 female) volunteers (24.3 years) were enrolled in this prospective cross-sectional study. Participants performed tests on one day under a non-fatigued state of invertor and evertor muscles and on the second day in a fatigued state. Tests included static posturography on a force platform in a bipedal stance with eyes open and closed and in one-legged support with eyes open and functional jump tests (figure-of-8, side hop, 6-m crossover hop, and square hop). Fatigue of the ankle invertor and evertor muscles was induced using isokinetic dynamometry with 30 repetitions at 120°/s.ResultsParticipants had an average age of 24.3 years (SD ± 2.08), the height of 1.73 m (SD ± 0.08), and a weight of 68.63 kg (SD ± 10.29). The average Body Mass Index (BMI) was 22.88 (SD ± 2.46). A decrease in performance was observed in functional activities and postural control under all conditions after the induction of muscle fatigue, except for the speed at a bipedal stance with eyes open.ConclusionsFunctional jump tests are low cost and useful for clinical practice and evaluation of the effects of muscle fatigue and could be used in clinical practice.Copyright © 2022 HCFMUSP. Published by Elsevier España, S.L.U. All rights reserved.

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