Valoración de la estabilidad dinámica mediante plataformas de fuerza en futbolistas juveniles categoría sub-19 del Club Sport Emelec.

Abstract

This study aimed to assess dynamic stability using force plates in Category U-19 youth soccer players from Club Sport Emelec (Guayaquil, Ecuador). A quantitative, non-experimental, descriptive, and cross-sectional design was used. While 33 athletes belong to this category, the final census of the accessible population comprised 31 U-19 soccer players following the exclusion of two players due to grade II ankle sprains. Each athlete was evaluated using the VALD ForceDecks platform across three jump tests: Countermovement Jump (CMJ), Single Leg Jump (SLJ), and Single Leg Land and Hold (SLLAH), recording kinetic performance variables and inter-limb asymmetry. The results indicate that dynamic stability varies according to task demand: in the CMJ, where both limbs act synchronously, push-off phase asymmetry was low (4,7%–6,2%), whereas higher descriptive asymmetry percentages were observed in specific variables during single-leg tests (SLJ and SLLAH). Furthermore, using an exploratory asymmetry threshold of ≥15% previously reported in the literature, 18 out of 31 players in the SLJ (58,1%) and 17 out of 31 in the SLLAH (54,8%) exceeded this value. Likewise, the highest descriptive asymmetries were observed in variables associated with deceleration and post-landing stabilization. It is concluded that dynamic stability in this cohort is task-specific, with the braking component showing greater compromise than the propulsive phase, representing one of the first descriptive approaches of this nature in Ecuadorian developmental soccer.