## 3 Results
Post-exercise right leg flexibility (RFlex post) negatively correlated with pre-exercise coordinative and arm-using capacities (CCA pre, r = 0.474, \(p\) = 0.013), pre-exercise forced expiratory volume in the first second (Fev1 pre, r = 0.416, \(p\) = 0.035), and post-exercise forced vital capacity (FVC post, r = 0.548, \(p\) = 0.003). Post-exercise right foot Jack's test (RJack post) showed a negative correlation with pre-exercise body temperature (BT pre, r = 0.558, \(p\) = 0.004). Post-exercise left foot navicular drop (LDrop post) negatively correlated with pre-exercise countermovement jump (CMJ pre, r = 0.432, \(p\) = 0.024), and post-exercise right foot navicular drop (RDrop post) showed negative correlations with pre-exercise countermovement jump (CMJ pre, r = 0.505, \(p\) = 0.007), post-exercise countermovement jump (CMJ post, r = 0.425, \(p\) = 0.027), and pre-exercise isometric hand strength (IHS pre, r = 0.443, \(p\) = 0.027). The post hoc correlation analysis conducted between pre- and post-race variables revealed several significant relationships. Notably, there was a strong positive correlation between pre- and post-race CMJ (r = 0.80) and ABK (r = 0.68) values, suggesting that athletes with higher pre-race explosive strength were able to maintain better performance levels after the race. This highlights the importance of initial strength capacity in preserving post-race performance, particularly in terms of leg power. Upper body coordination and grip strength, measured through CCUB, displayed weaker correlations between pre- and post-race values. This indicates that these measures may be more affected by race-induced fatigue or the specific demands of the obstacle course, making them less consistent across pre- and post-race conditions. In terms of respiratory function, FVC and Fev1 demonstrated moderate positive correlations between pre- and post-race values (r = 0.43 for FVC, r = 0.47 for Fev1). These results suggest that respiratory endurance remains relatively stable during the race but experience moderate reductions post-race, likely due to race-induced exertion and fatigue. Furthermore, the cross-variable correlations revealed that pre-race CMJ and ABK were moderately correlated with post-race respiratory measures, such as FVC and Fev1. This indicates that athletes with greater muscular performance might also exhibit better maintenance of respiratory capacity under race conditions, emphasizing the interconnectedness of muscular and respiratory endurance in overall race performance. Finally, a linear regression analysis was performed to evaluate the relationship between pre-race physiological variables and post-race countermovement jump (CMJ) performance. The model explained 56% of the variance in post-race CMJ (R\({}^{2}\) = 0.56). The strongest positive predictors of post-race CMJ were pre-race CMJ (\(\beta\) = 0.63) and forced vital capacity (FVC) (\(\beta\) = 0.34). Conversely, pre-race upper-body coordination and grip strength (CCUB) had a negative impact (\(\beta\) = \(-\)0.39), suggesting that athletes with better pre-race lower-body explosive power and lung capacity tend to maintain better performance, while upper-body fatigue might contribute to reduced jump capacity post-race. Other pre-race variables, such as Abalakov jump (ABK) and FER25, showed smaller positive contributions, while Fev1 had a minor negative influence.