Evaluation of Fluid Loss and Customary Fluid Intake among a Selected Group of Young Swimmers: A Preliminary Field Study

This study aimed to assess fluid loss (FL) and customary intake (FI) during a training session, the relationship between FL total body water (TBW) content in selected group of young swimmers. The involved 17 (seven females, 10 males) individuals whose anthropometric composition analyses FI units were carried out. average actual oscillated around 531 mL −513 for whole (469 −284 574 −674 males). dependent independent sample t-tests, Cohen’s d effect size Pearson’s correlation coefficient analysed. Significant differences observed pre-workout post-workout weights after without (66.5 kg vs. 66.0 kg, p < 0.001, = 0.06), females (61.2 60.9 0.015, 0.04) males (70.3 69.6 0.9). For TBW fat-free mass (FFM) before training, significant only (TBW: 43.8 L 43.2 L, 0.002, 0.14; 62.4% 61.7%, 0.36; FFM: 59.8 59.1 0.12). Moreover, was (mL %: r −0.64, 0.006; L: −0.84, 0.001) male −0.73, 0.017). These results indicated swimmers pre-training content, which suggests that it is important also pay special attention effective hydration procedures aquatic environments.