| Autor: |
Fortes LS; Associate Graduate Program of Physical Education, Federal University of Paraíba, Joao Pessoa, Brazil., Fonseca FS; Department of Physical Education, Federal Rural University of Pernambuco, Recife, Brazil., Nakamura FY; Associate Graduate Program of Physical Education, Federal University of Paraíba, Joao Pessoa, Brazil., Barbosa BT; Associate Graduate Program of Physical Education, Federal University of Paraíba, Joao Pessoa, Brazil., Gantois P; Associate Graduate Program of Physical Education, Federal University of Paraíba, Joao Pessoa, Brazil., de Lima-Júnior D; Associate Graduate Program of Physical Education, Federal University of Paraíba, Joao Pessoa, Brazil., Ferreira MEC; Graduate Program of Physical Education, Federal University of Juiz de Fora, Juiz de Fora, Brazil. |
| Abstrakt: |
We studied the effects of repeated inducements of mental fatigue (MF) from using social media on smartphones immediately before training sessions by young male volleyball athletes, focusing specifically on their decision-making, endurance, and countermovement jump performance (CMJ). We pair-matched 24 participants according to their decision-making abilities and then, randomly assigned them to one of two 4-week block training groups: control (CON) and smartphone use (SMA). For a 30-minute period before each training session, the CON group watched TV and the SMA group used social media apps on smartphones. We found a significant group x time interaction effect for decision making (attack, p = 0.03; passing, p = 0.02) during training blocks. More specifically, only the CON group improved their decision making (attack, p = 0.03; passing, p = 0.02). Both groups significantly improved their CMJ performance ( p = .01), with no significant group x time interaction effect for CMJ ( p = 0.91). Neither group significantly improved their endurance ( p = 0.56). We concluded that 30-minutes of repetitive social media app use on a smartphone immediately before 4-weeks of volleyball training sessions negatively affected decision-making in young male volleyball athletes. |
