Introduction: In recent years, shifts in children’s lifestyle habits have adversely affected their health, particularly through rising obesity rates and increased consumption of sugar-sweetened and energy drinks. These dietary patterns often correlate with sedentary behaviors and reduced physical activity. This study aimed to examine the consumption of sugary and energy drinks among children and its association with participation in sports.

Method: A cross-sectional study was conducted involving primary school children from educational centers in Pontevedra, Spain. An ad hoc online questionnaire was developed to collect sociodemographic data and assess key variables related to the consumption of energy and sugar-sweetened drinks.

Results: A total of 94 children participated (aged 8–12 years; 52.1% boys). Consumption of soft and energy drinks during sports activities was generally low. However, 31% of children reported consuming soft drinks during leisure time. Regarding sports drinks, 16% consumed them during leisure time and 11.7% during physical activity. The main reasons cited for consuming these beverages during sports included enhancing strength (18.1%), maintaining maximum intensity (17.0%), and supporting aerobic endurance (12.8%).

Conclusion: Children were more likely to consume sugary and energy drinks during leisure time than during sports practice. Despite relatively low intake during physical activity, some children believed these drinks improved physical performance. These findings underscore the importance of early educational interventions to dispel misconceptions and encourage healthier hydration habits.