Background: Obesity has become an epidemic and is a major threat to health. There are many ways to overcome obesity, one of which is exercise, but there are still reasons such as not having time to exercise. The purpose of this study is to discuss and describe the effects of High-Intensity Interval Training on weight loss in obese adults. Method: The method used in this study was a literature review using PRISMA to determine the number of articles used, the PEDro scale to assess each article, and check the quartiles of articles through schimago, then The articles were explained the population, intervention, comparison and outcome of each article. Result: The results obtained were that weight loss in the HIIT group varied from each article, namely 3.9kg, 5.3kg, 5.7kg, and 5kg, All comparison groups from articles that discussed HIIT and BMI also experienced weight loss, but HIIT had advantages in losing weight compared to some other comparisons, except for a study conducted by D'Amuri et al in 2021 which showed greater weight loss results in the MICT group, namely 0.3kg more than the HIIT group which was only 5.7kg, however, the two groups did not have a significant difference. Conclusion: This study concludes that High-Intensity Interval Training can reduce the weight of individuals who are obese in adulthood.
                        
                        
                        
                        
                            
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