The current study had investigated how specific physiological parameters and the endurance of offensive skills of elite Iraqi badminton players are influenced using preparatory phase training. The study used a systematic experimental research design to determine the impact of high-intensity interval exercise (HIIE) on technical accuracy and movement efficiency. Maximal oxygen uptake (VO 2 max), blood lactate levels, and other salient physiological variables were taken before and after training. The results indicated that VO 2 max was significantly increased and lactate was reduced which indicated an increase in aerobic and anaerobic capacity. There was also an increased offensive physical endurance among the participants, increased shot effectiveness and mental resilience especially in footwork and line plays when tired. The findings highlight the importance of endurance-based skill training in badminton training. The result of the present research supports evidence-based changes to incorporate physiological conditioning and skill performance to achieve the best in a competitive manner. Conclusions. The implications of the findings to the wider field of sports science are far reaching as the study suggests that high-intensity performance, at an elite level, requires structured preparatory training before competition. This justifies the need to conduct additional studies on personalized endurance training models and high-performance conditioning regimens to help in improving player efficiency and resilience.