PhD Scientific Days 2025

Poster Session II. - Z: Euniwell

Reliability of maximal isometric hip abduction strength in three body positions in youth soccer players

Előadó neve

Armada Zarco José Manuel

Előadó munkahelye

University of Murcia

Előadó e-mail címe

josemanuel.armadaz@um.es

Az előadás címe

Reliability of maximal isometric hip abduction strength in three body positions in youth soccer players

Szerző(k) neve és munkahelye

Armada-Zarco, J. M.¹, Cejudo, A.¹, Sainz de Baranda, P.¹

1: University of Murcia

Bemutatás módja

Poszter

Szekció

Poster Session II. - Z: Euniwell

Language of the presentation

English

Összefoglaló szövege

Introduction. Measuring the maximal isometric strength (MIS) of the hip abductor (ABD) muscles is an essential tool for injury prevention in youth soccer. The use of a hand-held dynamometer (HHD), particularly when placed at the ankle, on the lateral malleolus (LM), allows for a more functional assessment with a longer lever arm. However, body position during testing may affect the reliability and sensitivity of the results. This study compares these properties across three commonly used body positions in the literature: side-lying (SL), supine (SP), and standing (ST), using a standardized distal placement of the HHD at the LM. Method. Fifty male soccer players (15.8 ± 1.6 years) from U14, U16, and U18 categories participated in this cross-sectional observational study. Hip ABD strength was assessed using an HHD placed on the LM. Measurements were conducted in three positions: SL, SP, and ST. Each test was performed during the second session of two consecutive weeks. Intraclass correlation coefficient (ICC), standardized typical error of measurement (STEM), coefficient of variation (CVTE), minimal detectable change at 95% confidence (MDC95), and sensitivity (SWC) were calculated. Results. The SL position showed the highest reliability, with ICC values of 0.96 (dominant) and 0.95 (non-dominant), followed by SP (ICC = 0.93 and 0.95) and ST (ICC = 0.92 and 0.94). The lowest CVTE was observed in SL (0.10 and 0.11), intermediate in SP (0.10 and 0.09), and highest in ST (0.17 and 0.14), indicating greater variability in the upright position. MDC95 was also lowest in SL (0.28–0.29 Nm/kg), compared to SP (0.29–0.25 Nm/kg), and significantly higher in ST (0.46–0.40 Nm/kg). Regarding sensitivity, all positions were rated as “marginal” for detecting small changes (SWC0.2). However, SL and SP were rated as “good” for detecting moderate changes (SWC0.6 = 0.27–0.28 in SL; 0.22 in SP), whereas ST showed lower accuracy (SWC0.6 = 0.34–0.37). For detecting large changes (SWC1.2), all positions were considered “good.” Conclusion. To assess ABD MIS using an HHD at the LM, the SL position offers the greatest reliability and sensitivity. The SP position also yields good results, while the ST position is less accurate. Although SL provides better values, it is recommended that sports professionals and researchers use the SP position, as it is easier to implement, more comfortable for the player, and yields similar outcomes. This protocol helps detect real changes in strength and improves injury risk monitoring.

No public funding

University

University of Murcia

Supervisor

Antonio Cejudo Palomo and Pilar Sainz de Baranda

Publication of my abstract

I do not give consent to the publication of my abstract on the website of the congress.

Kind

Szabad

Status

elfogadva

Accepted presentation method

poszter

Előadás fájl jóváhagyás

nem rendelkezett róla

Előadó

1951

Start

18:12

End

18:18