The main aim of this study was to investigate the acute effects of the use of a weighting set (Powerinstep®) on measures of stroke velocity (StV), accuracy and change of direction speed (CODS) in junior tennis players. A within-subjects design was used to evaluate seventeen (6 female and 11 male) tennis players (mean ± SD; 16.5 ± 1.3 years old; 1.75 ± 8.4 m; 67.0 ± 8.1 kg; 22.04 ± 1.8 kg/m 2) on StV of three specific tennis actions (serve, forehand and backhand) and CODS for the following conditions: wearing a 50, 100, 150, 200 g weight or no weight at all (baseline). No significant differences were found between conditions for forehand (F = 0.412; p = 0.799), backhand (F = 0.269; p = 0.897) and serve (F = 0.541; p = 0.706) velocity and forehand (F = 1.688; p = 0.161), backhand (F = 0.567; p = 0.687) and serve (F = 2.382; p = 0.059) accuracy and CODS (F = 0.416; p = 0.797). Small-to-moderate effect sizes (ES) negatively affecting StV when using 200 g compared to the baseline (ES = 0.48, 0.35 and 0.45) could be observed. Moderate (ES =-0.49) and trivial (ES =-0.14 and-0.16) ES for a higher accuracy score were noticed in serve, forehand and backhand 100 g compared to the baseline. Moreover, small ES (ES = 0.41) for improvement in 200 g CODS comparing to baseline conditions were found. These results indicate that the use of a weighting set does not significantly affect StV or CODS respectively. Notwithstanding, small-to-moderate changes show impact in accuracy and no variance in velocity production when using 100 g alongside faster execution in CODS when using 200 g.

Este estudio contribuye a la literatura existente sobre comunicación deportiva proporcionando evidencia sobre cómo las organizaciones deportivas se comunicaron en las redes sociales durante la pandemia del COVID-19. Para tal fin, se realizó un análisis de contenido de las publicaciones de las redes sociales Facebook, Twitter e Instagram de cinco grandes competiciones: Liga ENDESA ACB, TURKISH AIRLINES Euroleague, NBA, La Liga y la UEFA Champions League. En total se analizaron 2.425 publicaciones recopiladas por un período de dos semanas (1 al 15 de abril de 2020). Los resultados mostraron que, a pesar de las diferencias encontradas desde una perspectiva descriptiva, tras el análisis estadístico, las organizaciones deportivas analizadas optaron por una estrategia de gestión similar de sus redes sociales. Estos hallazgos pueden ayudar a comprender cómo las organizaciones deportivas lidiaron con el COVID-19, y ayudarlas a enfrentar crisis futuras con un mayor conocimiento sobre sus acciones pasadas.

Some studies have examined ticket sales in the context of a sporting event. However, only a few have investigated the determinants of ticket prices, and, to date, none have done so in the context of a multidisciplinary sports mega-event. This study examines this complex paradigm through the case of the World Swimming Championships held in Barcelona, Spain. The particular focus of this study was whether, in such a framework, the same model of analysis of price determinants could be applied equally to all the disciplines that comprise the sporting mega-event. The applied model was significant, explaining the ranges of variation of the ticket prices in the different sport disciplines. The main hypothesis was rejected, which suggests that when examining price determinants in multidisciplinary sport mega-events, it will be convenient to implement a different model for each sporting discipline (aquatic, in the case at hand). These results can help professionals better understand consumer fluctuations throughout the ticket sales process in such an environment, in order to appropriately price tickets. This, in turn, will lead to maximizing revenue, as well as attendance, at sporting events.