This study aimed to examine the effectiveness of an integrated training approach combining plyometric training and high-intensity interval training (HIIT) in improving the physical performance of athletes representing the Palestinian National Sprint Team in the Southern Governorates of Palestine. A quasi-experimental design employing a one-group pretest–posttest approach was adopted to evaluate the effectiveness of the proposed training program. The study population comprised national-level sprinters competing in the 100 m and 200 m events. A purposive sample of 16 athletes was selected based on their event specialization and competitive training experience. Data were collected using a battery of standardized physical performance tests assessing explosive power, sprint speed, muscular endurance, and maximal oxygen uptake (VO₂max), following the establishment of the validity and reliability of the measurement instruments. The integrated training program was implemented over an eight-week period using a progressive overload protocol. The findings demonstrated significant improvements across all measured physical performance variables. Explosive power increased by 18%, 60 m sprint performance improved by 12%, and maximal oxygen uptake (VO₂max) increased by 20%. In addition, the integrated training approach enhanced overall physical performance while reducing total training time by approximately 25% without compromising training quality. The study concludes that integrating plyometric training with HIIT constitutes an effective training strategy for enhancing the physical capacities of competitive sprinters through physiological and neuromuscular adaptations that support superior athletic performance. The study recommends incorporating this integrated training approach into sprint preparation programs while applying scientifically planned progressive training loads to maximize physical adaptations and minimize training-induced fatigue................... Keywords:...... Plyometric Training - High-Intensity Interval Training- Explosive Power - Physical Performance- Physical Performance.