National active games represent an effective pedagogical and physical training tool that stimulates motor development, social interaction, teamwork, and emotional engagement among students. This research aims to determine the effect of incorporating national active games into physical education lessons on the physical fitness indicators of students in the 5th–7th grades. Forty students participated in the study and were divided into an experimental (n=20) and a control group (n=20). The experimental group engaged in national active games for 15–20 minutes during each physical education lesson over eight weeks. Pre- and post-tests measured agility, speed, endurance, and motor coordination. The results showed statistically significant improvements in the experimental group compared to the control group. The study concludes that national active games increase physical fitness, motivation, and learning engagement. Practical recommendations for teachers are provided.