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oai:riuma.uma.es:10630/378422026-02-03T11:05:00Zcom_10630_2254col_10630_37953

Ruiz-Muñoz, María González-Sánchez, Manuel Cuesta-Vargas, Antonio 2025-02-13T11:37:31Z 2025-02-13T11:37:31Z 2015 Ruiz Muñoz M, González-Sánchez M, Cuesta-Vargas AI. Tibialis anterior analysis from functional and architectural perspective during isometric foot dorsiflexion: a cross-sectional study of repeated measures. J Foot Ankle Res. 2015 Dec 18;8:74. doi: 10.1186/s13047-015-0132-3. PMID: 26688692; PMCID: PMC4684620. https://hdl.handle.net/10630/37842 10.1186/s13047-015-0132-3 Background: The purpose of the present study is to establish the relationship and degree of contribution between torque and sonomiography variables (pennation angle - muscle thickness), and electromyography variables (EMGAreaUnderCurve - EMGMaximalPeak) of the tibialis anterior muscle during (TA) maximal and relative isometric foot dorsiflexion (IFD). Secondary aim: To determine the measurement's reliability. Methods: Cross-sectional study. 31 participants (15 men; 16 women) performed IFD at different intensities (100, 75, 50, and 25 %) of the maximal voluntary contraction (MVC) (three times for each intensity). Outcome variables: To determine the torque, pennation angle, muscle thickness, EMGMaximalPeak, and EMGAreaUnderCurve. Statistical analysis: In order to test the measurement's reliability, Cronbach's alpha and standard error of the measurement were determined. An inferential analysis was carried out using Pearson correlations(r). For each contraction intensity, a multiple regression analysis was performed, where the dependent variable was torque and the independent variables were EMGAreaUnderCurve, EMGMaximalPeak, muscle thickness and pennation angle. Results: All outcome variables show excellent reliability. The highest correlation value was 0.955 (thickness 100 % - thickness 25 %). R (2) values ranged from 0.713 (100 % MVC) to 0.588 (25 % MVC). Conclusion: The outcome variables demonstrated excellent reliability in terms of measuring IFD at different intensities. The correlations between all outcome variables were moderate-to-strong. TA functional and architectural variables have a significant impact on the torque variance during IFD at different intensities. eng open access Pies - Propiedades mecánicas Tibialis anterior analysis from functional and architectural perspective during isometric foot dorsiflexion: a cross-sectional study of repeated measures journal article