High intensity interval training HIIT is a training method that uses alternating cycles of work and rest. It has been an interesting strategy for rehabilitation and / or treatment of the cardiovascular system. HIIT is a fast and effective exercise for people who have less time and seek benefits through exercise. This study aimed to present a review study on the effect of high intensity interval training for the cardiovascular system improvement process, searching for information and results of related articles. METHODS: This study of literature narrative review has its data bases GOOGLE ACADEMICO, PUBMED, GOOGLE, with the objective of exposing the quality of interval training of high intensity despite being intense exercise and reflect the evidence found in the literature regarding the results of the process of improvement of the cardiovascular system. Conclusion: High-intensity interval training demonstrates improvements in body composition, lower blood pressure, improved aerobic capacity, increased fat oxidation capacity, and reverses metabolic syndrome risk factors that are related to high blood pressure. Descriptors: Training; Cardiovascular system; arterial hypertension; Rehabilitation; HIIT.
