Change in Central Cardiovascular Function in Response to Intense Interval Training

Background: Intense interval training has gained considerable attention as an effective exercise strategy for improving cardiovascular health and physical performance. This training model typically involves repeated bouts of high‑intensity exercise separated by recovery periods and can produce substantial physiological adaptations within a relatively short period. Central cardiovascular function, including cardiac output, stroke volume, heart rate regulation, ventricular function, and vascular responses, plays a key role in determining aerobic capacity and exercise tolerance. Understanding how intense interval training influences these central cardiovascular variables is important for optimizing exercise prescription in both healthy and clinical populations. Methods: This study was conducted as a narrative review of experimental and clinical studies examining changes in central cardiovascular function following intense interval training. Relevant literature published between ۲۰۰۵ and ۲۰۲۵ was identified through searches of PubMed, Scopus, and Web of Science databases. Eligible studies included healthy adults, athletes, or clinical populations who participated in structured high‑intensity interval training or sprint interval training programs. Primary outcomes included changes in cardiac output, stroke volume, maximal oxygen uptake, heart rate responses, ventricular function, arterial function, and blood pressure regulation. Results: Evidence from the reviewed studies suggests that intense interval training can induce meaningful improvements in central cardiovascular function. Common adaptations include increased stroke volume, enhanced maximal cardiac output, improved autonomic regulation, and reduced resting or submaximal heart rate. Many studies also report improvements in maximal oxygen uptake, reflecting enhanced integration of central and peripheral cardiovascular adaptations. In some populations, interval training may improve ventricular filling, myocardial function, endothelial function, and blood pressure control. The magnitude of these adaptations appears to depend on training intensity, interval duration, recovery structure, program length, and baseline fitness status. Conclusion: Intense interval training appears to be an effective method for improving central cardiovascular function and aerobic capacity. Its time‑efficient nature makes it a practical exercise strategy for enhancing cardiovascular health and performance. Future research should focus on identifying optimal interval training protocols for different populations and clarifying the long‑term cardiovascular effects of this training approach.

کلیدواژه ها:

Intense Interval Training ، High‑Intensity Interval Training ، Cardiovascular Function ، Stroke Volume