Intra and Inter-Test Reliability of Isometric Hip Adduction Strength Test with Force Plates in Professional Soccer Players

Assessing the reliability of measurement instruments and equipment is essential to ensure the accurate tracking of athletes over extended periods, minimizing the measurement errors caused by chance or other factors. However, a less common but equally important analysis is the verification of inter-m...

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Main Authors: Jorge Pérez-Contreras, Juan Francisco Loro-Ferrer, Pablo Merino-Muñoz, Felipe Hermosilla-Palma, Brayan Miranda-Lorca, Alejandro Bustamante-Garrido, Felipe Inostroza-Ríos, Ciro José Brito, Esteban Aedo-Muñoz
Format: Article
Language:English
Published: MDPI AG 2024-12-01
Series:Journal of Functional Morphology and Kinesiology
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Online Access:https://www.mdpi.com/2411-5142/9/4/270
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author Jorge Pérez-Contreras
Juan Francisco Loro-Ferrer
Pablo Merino-Muñoz
Felipe Hermosilla-Palma
Brayan Miranda-Lorca
Alejandro Bustamante-Garrido
Felipe Inostroza-Ríos
Ciro José Brito
Esteban Aedo-Muñoz
author_facet Jorge Pérez-Contreras
Juan Francisco Loro-Ferrer
Pablo Merino-Muñoz
Felipe Hermosilla-Palma
Brayan Miranda-Lorca
Alejandro Bustamante-Garrido
Felipe Inostroza-Ríos
Ciro José Brito
Esteban Aedo-Muñoz
author_sort Jorge Pérez-Contreras
collection DOAJ
description Assessing the reliability of measurement instruments and equipment is essential to ensure the accurate tracking of athletes over extended periods, minimizing the measurement errors caused by chance or other factors. However, a less common but equally important analysis is the verification of inter-measurement agreement, which complements the reliability results. <b>Purpose:</b> To evaluate the intra- and inter-test reliability of an isometric hip adduction strength and asymmetries test in professional soccer players. <b>Methods</b>: Twenty-three professional male soccer players were evaluated on two occasions, 1 week apart. The force signal was collected using force plates (Pasco PS-2141), and the data processing was performed using Matlab software (R2023a, MathWorks, Natick, MA, USA). The peak force, interval RFD, peak RFD, peak force asymmetry and RFD were analyzed. Intraclass correlation coefficients (ICCs) and coefficients of variation (CV) were calculated to corroborate the intra- and inter-test reliability. In addition, the degree of agreement of the asymmetries was corroborated through the kappa index. <b>Results</b>: The peak force demonstrated an acceptable absolute reliability (CV < 10%) for the intra-test and test–retest condition, an excellent relative intra-test reliability and a good to moderate reliability for the test–retest reliability. However, the peak force asymmetry showed a moderate test–retest reliability and agreement. For the intra-test condition, the RFD variables demonstrate a moderate to excellent relative reliability; however, all demonstrate unacceptable absolute reliability (CV > 10%) in at least one of the evaluation sessions. A moderate to poor test–retest reliability and unacceptable absolute reliability were observed for all the RFD variables. <b>Conclusions</b>: The peak force is the variable with the highest intra- and inter-test reliability, so its use is recommended to longitudinally assess the maximum strength of the adductors in professional soccer players, but not the asymmetry orientation of the peak force. The RFD variables should be interpreted with caution due to their inconsistent reliability, and it is necessary to improve the methods used to achieve adequate reliability.
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spelling doaj-art-8ca4e67a87a64c628c5ab61cc98295a62025-08-20T02:55:38ZengMDPI AGJournal of Functional Morphology and Kinesiology2411-51422024-12-019427010.3390/jfmk9040270Intra and Inter-Test Reliability of Isometric Hip Adduction Strength Test with Force Plates in Professional Soccer PlayersJorge Pérez-Contreras0Juan Francisco Loro-Ferrer1Pablo Merino-Muñoz2Felipe Hermosilla-Palma3Brayan Miranda-Lorca4Alejandro Bustamante-Garrido5Felipe Inostroza-Ríos6Ciro José Brito7Esteban Aedo-Muñoz8Escuela de Doctorado de La Universidad de Las Palmas de Gran Canaria (EDULPGC), 35016 Las Palmas, SpainClinical Sciences Department, University of Las Palmas de Gran Canaria, 35016 Las Palmas, SpainNúcleo de Investigación en Ciencias de la Motricidad Humana, Universidad Adventista de Chile, Chillán 3780000, ChileEscuela de Pedagogía en Educación Física, Facultad de Educación, Universidad Autónoma de Chile, Talca 3460000, ChileDepartamento de Educación Física, Deportes y Recreación, Facultad de Artes y Educación Física, Universidad Metropolitana de Ciencias de la Educación, Santiago 7760197, ChileEscuela de Ciencias del Deporte y Actividad Física, Facultad de Salud, Universidad Santo Tomas, Santiago 8370003, ChileDepartment of Physical Education, Federal University of Juiz de Fora, Governador Valadares 35010-180, BrazilDepartment of Physical Education, Federal University of Juiz de Fora, Governador Valadares 35010-180, BrazilEscuela de Ciencias de la Actividad Física, El Deporte y la Salud, Facultad de Ciencias Médicas, Universidad de Santiago de Chile, Santiago 8370003, ChileAssessing the reliability of measurement instruments and equipment is essential to ensure the accurate tracking of athletes over extended periods, minimizing the measurement errors caused by chance or other factors. However, a less common but equally important analysis is the verification of inter-measurement agreement, which complements the reliability results. <b>Purpose:</b> To evaluate the intra- and inter-test reliability of an isometric hip adduction strength and asymmetries test in professional soccer players. <b>Methods</b>: Twenty-three professional male soccer players were evaluated on two occasions, 1 week apart. The force signal was collected using force plates (Pasco PS-2141), and the data processing was performed using Matlab software (R2023a, MathWorks, Natick, MA, USA). The peak force, interval RFD, peak RFD, peak force asymmetry and RFD were analyzed. Intraclass correlation coefficients (ICCs) and coefficients of variation (CV) were calculated to corroborate the intra- and inter-test reliability. In addition, the degree of agreement of the asymmetries was corroborated through the kappa index. <b>Results</b>: The peak force demonstrated an acceptable absolute reliability (CV < 10%) for the intra-test and test–retest condition, an excellent relative intra-test reliability and a good to moderate reliability for the test–retest reliability. However, the peak force asymmetry showed a moderate test–retest reliability and agreement. For the intra-test condition, the RFD variables demonstrate a moderate to excellent relative reliability; however, all demonstrate unacceptable absolute reliability (CV > 10%) in at least one of the evaluation sessions. A moderate to poor test–retest reliability and unacceptable absolute reliability were observed for all the RFD variables. <b>Conclusions</b>: The peak force is the variable with the highest intra- and inter-test reliability, so its use is recommended to longitudinally assess the maximum strength of the adductors in professional soccer players, but not the asymmetry orientation of the peak force. The RFD variables should be interpreted with caution due to their inconsistent reliability, and it is necessary to improve the methods used to achieve adequate reliability.https://www.mdpi.com/2411-5142/9/4/270reproducibilitymuscle strengthisometric contractionhip
spellingShingle Jorge Pérez-Contreras
Juan Francisco Loro-Ferrer
Pablo Merino-Muñoz
Felipe Hermosilla-Palma
Brayan Miranda-Lorca
Alejandro Bustamante-Garrido
Felipe Inostroza-Ríos
Ciro José Brito
Esteban Aedo-Muñoz
Intra and Inter-Test Reliability of Isometric Hip Adduction Strength Test with Force Plates in Professional Soccer Players
Journal of Functional Morphology and Kinesiology
reproducibility
muscle strength
isometric contraction
hip
title Intra and Inter-Test Reliability of Isometric Hip Adduction Strength Test with Force Plates in Professional Soccer Players
title_full Intra and Inter-Test Reliability of Isometric Hip Adduction Strength Test with Force Plates in Professional Soccer Players
title_fullStr Intra and Inter-Test Reliability of Isometric Hip Adduction Strength Test with Force Plates in Professional Soccer Players
title_full_unstemmed Intra and Inter-Test Reliability of Isometric Hip Adduction Strength Test with Force Plates in Professional Soccer Players
title_short Intra and Inter-Test Reliability of Isometric Hip Adduction Strength Test with Force Plates in Professional Soccer Players
title_sort intra and inter test reliability of isometric hip adduction strength test with force plates in professional soccer players
topic reproducibility
muscle strength
isometric contraction
hip
url https://www.mdpi.com/2411-5142/9/4/270
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