Browsing by Subject "Cognitive fatigue"

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    Effect of repeated use of social media before training sessions on countermovement jumping and internal training load in high-level volleyball players
    (Universidad de Murcia. Servicio de publicaciones, 2024) Freitas Junior, Carlos; Berriel, Guilherme; Faro, Heloiana; Peyré Tartaruga, Leonardo; Fortes, Leonardo
    To verify the effect of repeated use of social media on smartphones immediately before countermovement jump (CMJ) and internal training load (ITL) training sessions in young male high-level volleyball athletes. 18 young international-level athletes participated in a randomized crossover study for a total of two weeks. The athletes are from the Brazilian under-19 team and were randomized into two experimental conditions, social media (SMA) and control (CON). SMA used social media for 30 minutes before training sessions for a week, while CON watched emotionally neutral videos. During this period, the ITL was analyzed using the session rating of perceived exertion (s-RPE) method. The CMJ was analyzed before, between, and after the two-week training. In the second week, the athletes reversed the experimental conditions. The CMJ was decreased after the training week (p =0.04), but with no difference between the experimental conditions (p = 0.51). The ITL was not different between the experimental conditions after the analyzed training week (p = 0.95). Repeated use of social media on smartphones immediately before training sessions for a week was not enough to harm the CMJ, nor did it increase the ITL in young international-level volleyball athletes.
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    Las Tareas Matemáticas Inducen Fatiga Mental, Pero Tienen un Pequeño Efecto en una Habilidad Específica del Voleibol: Un Estudio Cruzado Aleatorizado con Jóvenes Jugadoras
    (Universidad de Murcia: servicio de publicaciones, 2025) Costa, Yago; Eoli, Arthur; Batista, Gilmário; Sin departamento asociado
    Mental fatigue is characterized by a sense of tiredness following cognitive tasks. Previous studies have shown prolonged cognitive testing, social media use, and video gaming can impair sports performance. However, the impact of mathematical tasks on the perception of mental fatigue in young athletes, as well as their effects on performance, remains unclear. Therefore, this study aimed to investigate whether mathematical tasks cause mental fatigue and affect the performance in a specific volleyball skill of young female players. A crossover and randomized experimental design was employed. The participants were fifteen young female volleyball players who performed a specific volleyball skill in two experimental conditions (mathematics and control) separated by 3 –7 days of washout. In this sense, mental fatigue level (pre and post) intervention and the performance on specific volleyball skills (between days) were measured. A statistical difference was observed in mental fatigue level only pre-post the mathematics condition. Moreover, although no statistical difference was observed between the conditions in specific volleyball skill performance, only in the control condition was the time average for completing the task below the "certainly meaningful change" threshold. In conclusion, 30 minutes of a mathematical task increases the levels of mental fatigue in young female volleyball players. Furthermore, there seems to be a reduction in volleyball-specific skills, although this requires further confirmation. Trial Registration Number: Brazilian Clinical Trial Register (RBR-8w7d8np). Registered 02 January 2025 (Retrospectively registered).
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    The mental fatigue impaired beach volleyball attack technical-tactical performance: a crossover and randomized study
    (Universidad de Murcia. Servicio de publicaciones, 2024) Costa, Yago; Domingos Gomes, Jarbas; Lima-Junior, Dalton de; Lanzoni, Ivan; Batista, Giklmário
    The aim of this study was to investigate the effect of mental fatigue on the technical-tactical performance of beach volleyball players. Twelve males young beach volleyball players (16.1 ± 0.9 years old)were recruited to participate in this crossover and randomized study. The simulated match was performed under two conditions (control: 30 min without performing cognitive activities; mental fatigue: 30 min performing Stroop Task). The match is recorded and technical-tactical performance was calculated (coefficient of performance and/or efficiency of serve, serve reception, set, attack, block, and dig actions). The mental fatigue was “moderate” after Stroop Task, and statistically significant compared to the control condition [Mental fatigue: 62.5mm ± 8.8 Vs. Control: 6.4mm ± 4.1; p=.0001; ES: 0.9 (moderate effect)]. Moreover, attack coefficient of performance and efficiency was lower in mental fatigue condition that control condition (CP: Mental Fatigue= 1.5 ± 0.4 Vs. Control= 2.3 ± 0.2, p= .001; Eff: Mental Fatigue= 23.7 ± 7.0 Vs. Control= 36.0 ± 9.5; p=.004). In conclusion, mental fatigue impaired attack performance of beach volleyball players (one of the main key to win in this sport). Thus, is recommended avoid cognitive tasks or high cognitive effort before training and matches.