Tibialis anterior analysis from functional and architectural perspective during isometric foot dorsiflexion: a cross-sectional study of repeated measures

Journal of Foot and Ankle Research

Antonio I. Cuesta-Vargas²  Manuel González-Sánchez¹  Maria Ruiz Muñoz³ 

[1] Departamento Ciencias de la Salud. Instituto de Investigación Biomédica de Málaga (IBIMA), Universidad de Jaén, Málaga, Spain;School of Clinical Sciences at Queensland University, Brisbane, Australia;Departamento de Enfermería y Podología, Instituto de Investigación Biomédica de Málaga (IBIMA), Universidad de Málaga, Málaga, Spain

关键词: Anterior Tibial Muscle;    Multiple Regression Analysis;    Ultrasonography;    Electromyography;    Ankle;   

Others  :  1235164
DOI  :  10.1186/s13047-015-0132-3

 received in 2015-05-18, accepted in 2015-12-15,  发布年份 2015

【 摘 要 】

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 (EMG _{AreaUnderCurve}– EMG _MaximalPeak ) 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, EMG _MaximalPeak , and EMG _{AreaUnderCurve} . 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 EMG _{AreaUnderCurve} , EMG _MaximalPeak , 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.

【 授权许可】

   
2015 Ruiz Muñoz et al.

【 图 表 】

Fig. 1.

Fig. 2.

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