I am looking for comparative studies on the divergent effects of different HIIT protocols on cardiovascular and metabolic function. The vast majority of studies compare a single HIIT protocol with moderate continuous exercise protocols (in healthy and diseased subject populations). HIIT protocols which differ in intensity dose and duration (relative to the recovery intervals) should elicit different effects on vascular, cardiac and metabolic function. I am specifically interested in these differences in the context of hypertension. Does anybody work on similar questions or know studies in this area?