Examinando por Autor "Escobar-Molina, Raquel"

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    Ítem
    Comparative Analysis of Bilateral Deficits in Elbow Flexion Strength: Functional vs. Analytical Assessment
    (Multidisciplinary Digital Publishing Institute (MDPI), 2024-09) Pelayo-Tejo, Ignacio; Chirosa-Ríos, Luis; Escobar-Molina, Raquel; García-Ramos, Amador; del-Cuerpo, Indya; Chirosa-Ríos, Ignacio; Jerez-Mayorga, Daniel
    Background: this study aimed to identify the influence of postural stability on upper-limb bilateral deficit (BLD), and to compare the assessment of strength generated during elbow flexion functionally vs. analytically in the dominant and nondominant arms. Methods: Twenty men participated in two sessions to evaluate the maximum isometric strength of elbow flexion. This evaluation was performed unilaterally with the dominant arm, unilaterally with the non-dominant arm, and bilaterally, both in the sitting position (SiP) and the standing position (StP). Results: The BLD when peak force was considered was lower for StP (−6.44 ± 5.58%) compared to SiP (−10.73 ± 6.17%) (p = 0.007). Regarding peak force, statistically significant differences were observed for comparisons between dominance (p < 0.001) and Position*Dominance (p = 0.02), but mean force differences were only observed for the dominance factor (p < 0.001). Greater mean and peak forces were always produced bilaterally compared to unilaterally (p < 0.001). Conclusions: a decrease in postural stability by performing elbow flexion exercises in a standing position accentuates BLD of peak force.
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    Ítem
    Strength Assessment of Trunk Rotator Muscles: A Multicenter Reliability Study
    (MDPI, 2023-08) Rodríguez-Perea, Angela; Morenas Aguilar, María Dolores; Escobar-Molina, Raquel; Martínez-García, Darío; Chirosa Ríos, Ignacio; Jerez-Mayorga, Daniel; Chirosa Ríos, Luis; Janicijevic, Danica; Reyes-Ferrada, Waleska
    Background: Trunk rotator strength plays an important role in sports performance and health. A reliable method to assess these muscles with functional electromechanical dynamometer has not been described. Therefore, the objectives of this paper were (I) to explore the reliability of different strength variables collected in isokinetic and isometric conditions during two trunk rotator exercises, and (II) to determine the relationship of isometric and dynamic strength variables collected in the same exercise. Methods: A repeated measures design was performed to evaluate the reliability of the horizontal cable woodchop (HCW) and low cable woodchop (LCW) exercises. Reliability was assessed using t-tests of paired samples for the effect size, the standard error of measurement, the coefficient of variation (CV) and the intraclass correlation coefficient (ICC). The Pearson’s (r) correlation coefficient was used to explore the association between isometric and isokinetic tests. Results: HCW exercise is more reliable than LCW exercise in assessing trunk rotator muscles. The strength manifestation that should be used is the average strength, and the most reliable evaluation was the HCW at 0.40 m·s−1 concentric (ICC = 0.89; CV = 10.21%) and eccentric (ICC = 0.85; CV = 9.33%) contraction and the dynamic condition that most correlated with the isometric was LWC at 0.50 m·s−1 (r = 0.83; p < 0.01). Conclusion: HCW is a reliable exercise to measure trunk rotator muscles. © 2023 by the authors.