## 4 Discussion  
The purpose of this study was to determine efficient hydration by comparing body composition, water-regulating hormones, body electrolytes, and recovery ability after exhaustive exercise based on the intake of regular water compared to that after consuming an electrolyte drink before and after performing exhaustive exercise. The TBW was divided into approximately 60% ICW and approximately 40% ECW consisting of plasma and interstitial fluid. The TBW is very important for the maintenance of normal metabolism, oxygen and nutrients supply to the cells and removal of waste matter, and imbalances of TBW significantly affect health, which are related to kidney disease, circulatory system diseases among others [1]. Exercise is known to cause a serious imbalance in the ICW and ECW because of a decreased plasma volume, increased body temperature, and increased blood osmotic pressure [20]. Therefore, it is necessary to prevent ICW and ECW imbalance and dehydration during exercise through the intake of appropriate fluids. According to the results of this study, the type of fluid consumed had a differential effect on the reduction of ICW and ECW between rest and immediately after exercise and in the recovery from exercise. The factors limiting efficient exercise capacity include dehydration, energy depletion, and fatigue caused by metabolic by-products, such as lactic acid [21]. In this study, the TBW and urine levels showed no significant difference between rest and immediately after exercise, while the TBW, ICW, ECW, and urine levels showed no significant difference between 1 h after exercise and immediately after exercise with CON. However, after consuming 3 RINK there was a positive trend in all values after exercise. In a study by [PERSON] et al. [22], six adult male individuals were exposed to exercise-induced dehydration. The group was divided into groups ingesting control, glucose, NaCl, and KCl drinks, and \begin{table}
\begin{tabular}{c c c c c c c c c} \hline \hline
**Variables**Group & **R** & **P0 \#** & **5 m \#** & **10 m** & **15 m** & & **F** & **\(p\)** \\ \hline \multirow{3}{*}{Lactic acid (mmol/L) (\(n=10\)) & \(1.03\pm\) 0.42 0.91\% & \(6.98\pm 1.03\) 0.91\% & \(6.78\pm\) 0.678\% & \(6.26\pm\) 0.26\% & \(5.46\pm\) 0.46\% & T & 263.360 & 0.001 * \\  & & & & 1.30 & 1.44 \(\pm\) 0.76\% & & & & \\  & & & & & & & & \\  & & & & & & & & \\  & & & & & & & & \\  & & & & & & & & \\ \hline \hline \end{tabular}  
* R = Rest, P0 = Right after exercise, P1 = 1 h after exercise. Statistical significance was tested by repeated two-way ANOVA analysis of variances among groups at \({}^{*}p<0.05\). (T) = Time, (G) = Group, (T \(\times\) G) = Time \(\times\) Group. # \(p<0.05\) vs. CON (independent \(t\)-test). $_p_ \(<0.05\) vs. R; \(t\) \(p<0.05\) vs. 5 m; @ \(p<0.05\) vs. 10 m (independent \(t\)-test). Values are mean and SEM.  
\end{table} 
Table 4: Changes in recovery ability. Figure 4: Changes in recovery ability according to the timing of fluid intake. Data represent the mean and SEM (\(n=10\) per group). Statistical significance for variance was denoted as \({}^{*}p<0.05\), and differences between groups for change over time were denoted as # \(p<0.05\). R = Rest, P0 = Right after exercise, 5 m = 5 min after exercise, 10 m = 10 min after exercise, 15 m = 15 min after exercise. the body components were analyzed at 2 h after ingestion. The TBW, ICW, and ECW were significantly higher when a NaCl drink was ingested compared to the corresponding values in the control drink group, in line with the results of this study. In addition, a study by [PERSON] et al. [23] examined eight adult male individuals who were exposed to dehydration with an equivalent of 2% BW loss. The group received glucose, sodium, potassium, or chloride drinks with no difference in the amount of weight loss. Cumulative urine volumes were higher in the group that ingested glucose drinks that did not contain electrolytes, which is consistent with our findings.