The main objective of this research is to analyze the level of anxiety and precompetitive self-confidence of tennis and padel players and to check the influence of gender and competitive level in each of the sports. Four hundred and twenty-three tennis and padel players, with a mean age of 15.40 (± 3.43) years, participated in the study. Of the total number of players surveyed, 291 were padel players and 132 were tennis players. The Spanish version of the Competitive State Anxiety Inventory-2R (CSAI-2R) in the Spanish version was used to measure the level of cognitive anxiety, somatic anxiety and self-confidence between 30 and 35 min before the start of the match. The general results showed that the level of self-confidence of padel players is higher of tennis players. In relation to gender, female tennis players showed a higher level of precompetitive anxiety than male players, while, in padel, it was the opposite. In terms of competitive level, U14 players had the highest level of self-confidence and the lowest level of precompetitive anxiety. When comparing both sports, female tennis players show a higher level of state-anxiety than female padel players and U14 tennis players are the ones who showed a higher level of self-confidence. This study shows how precompetitive anxiety is one of the most important psychological variables in relation to sport performance and how it can vary according to gender and competitive level.

El objetivo del estudio fue analizar el efecto sobre la condición física, fuerza explosiva y agilidad, del portero joven a través del entrenamiento específico sin y con chaleco lastrado al 5% del peso corporal. Se estudiaron a 14 porteros de fútbol en dos grupos de estudio, seis del grupo específico y ocho de grupo control, de categoría Sub-16 y Sub-19. Realizaron seis sesiones de entrenamiento específico centrado en la fuerza y agilidad, el GC sin chaleco lastrado y el GE con el uso del chaleco lastrado al 5% del peso corporal. La muestra presenta valores normales en la prueba de Saphiro-Wilk. Las variables analizadas son fuerza explosiva a través de la aplicación “My Jump2” (Balsalobre-Fernández, Glaister & Lockey, 2015) y el test de agilidad Lloureq (Llopis, Ulloa & Requena, 2010) y adaptado específicamente (Pérez-Muñoz et al., 2018). Los principales resultados mostraron que el GE mejoró en todas las variables analizadas de forma significativa (p<0,05) y con tamaño del efecto mayor que el GC, tanto de forma general como por categorías de juego. En conclusión, la utilización del entrenamiento específico en el portero de fútbol demuestra que son un medio de entrenamiento adecuado y ventajoso para el portero en formación, con especial atención al uso del chaleco lastrado como herramienta de entrenamiento específica.