<![CDATA[High-intensity interval training (HIIT) has been shown to be an effective training method for improving cardiovascular fitness. This article presents a systematic literature review on the effect of HIIT on maximal oxygen uptake capacity (VO2Max) in Indonesian Air Force (TNI AU) military personnel. A literature search was conducted in several academic databases using keywords such as "high-intensity interval training," "HIIT," "VO2Max," and related terms. Inclusion criteria included studies with adult participants (generally aged 18-45 years) whose VO2Max was measured before and after the intervention. Selected studies have reported that HIIT training programs consistently improve participants' aerobic capacity. For example, studies have shown VO2Max increases of 5.5–7.2% after 8 weeks of HIIT training, and in some cases, reaching an average of 26.9% after 12 weeks of basic military physical training. A recent meta-analysis demonstrated that HIIT provides statistically superior or equivalent increases in VO2Max compared to moderate continuous training. Further thematic analysis indicated that long-interval protocols (≥2 minutes) with high training volume tended to be more effective in maximizing VO2Max increases, although short-interval protocols offered time efficiency. A practical implication of these findings is the potential integration of HIIT programs into the training schedules of Indonesian Air Force personnel to efficiently improve aerobic fitness. Recommendations include the implementation of tailored variations of HIIT protocols and further research in specific military populations.]]>
