Efeito da desidratação corporal no desempenho tático-técnico e na tomada de decisão de atletas de voleibol de praia

Abstract

Body dehydration, resulting from fluid imbalance, impairs both physical and cognitive performance and affects the physiological systems of athletes. However, there is limited

evidence regarding the effects of dehydration on tactical-technical performance and decision- making in beach volleyball athletes. This study aimed to analyze the effect of body dehydration

on the tactical-technical performance and decision-making of male beach volleyball athletes. The sample consisted of 24 young male beach volleyball athletes, aged between 15 and 19 years (16.75 ± 0.77 years; 71.45 ± 9.04 kg; 179.6 ± 0.05 cm; 22.08 ± 2.33 kg/m2; and 11.65 ± 3.62% body fat). Data collection was carried out at four distinct time points, using a counterbalanced design with a seven-day washout period between experimental conditions (euhydrated, dehydrated, or ad libitum). Body dehydration was assessed through body weight variation (InBody), urine color (UCOL), and urine specific gravity (portable refractometer). The results showed that, for the variables internal load, heart rate, offensive performance coefficient (K1 and K2), effectiveness (K1 and K2), and decision-making (K1 and K2), no statistically significant differences were observed between the experimental conditions. We conclude that body dehydration does not significantly influence the tactical-technical performance or the decision-making of beach volleyball athletes during the first match of the day.