Abstract
This study aims to determine the effect of High-Intensity Interval Training (HIIT) in improving VO2 Max in Football Students Activity Unit, University of Musamus. This research is an experimental study with one group pretest and posttest design research. The population in this study was Football Students Activity Unit, the University of Musamus, which numbered 22 students who were the subjects of the study. Data retrieval technique is by tests and measurements. The instrument used is a multi-stage fitness test (bleep test). The students were given HIIT; it carried out twice a week for four weeks. Analysis of the data used is using t-test at 0.05% as the significance level. Based on the results, the number of pretests showed on 39.6773. While at the posttest after there was an improvement, the number showed on 48.5863. Based on the results of data analysis on the hypothesis in the study, it was found that there was a significant effect of HIIT in improving VO2 Max football student activity unit, University of Musamus, it was indicated by the score of t-count that higher than t-table (13.015>2.080). There was a significant effect of the HIIT in improving football students' VO2 of Max at University of Musamus.
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