<![CDATA[This study aims to determine the effect of the High-Intensity Interval Training (HIIT) program on improving the physical endurance of students participating in the soccer extracurricular program at UPTD SMPN Satap 1 Bajawa. The research method used is an experimental design with a one-group pretest-posttest approach. The research subjects consisted of 20 students who participated in the soccer extracurricular activity. The instrument used to measure physical endurance was a fitness test, namely the beep test, to assess cardiorespiratory endurance capacity. The results of the study showed a significant improvement in students' physical endurance after the HIIT treatment was administered. This is evidenced by the difference in the average scores between the pretest and posttest, where the posttest scores were higher than the pretest scores. Statistical testing using the t-test indicated that the significance value was less than 0.05, meaning that the HIIT program had a significant effect on improving students' physical endurance. Therefore, the High-Intensity Interval Training (HIIT) program can be used as an effective training method to enhance the physical endurance of students in the soccer extracurricular program at UPTD SMPN Satap 1 Bajawa.]]>
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