Resting Arterial Diameter and Blood Flow Changes With Resistance Training and Detraining in Healthy Young Individuals

摘要

Active individuals reportedly have improved vascular structure and function when compared with their sedentary counterparts.1'2 Endurance performance is known to be limited by (among other factors) oxygen delivery and muscle perfusion, 2 aspects that can in part be modulated by an individual's vasculature.Changes in physical activity lead to acute alterations in vascular properties. An increase in physical activity, such as with endurance training, leads to increases in lumen diameter1'2 and arterial cross-sectional area (CSA). Conversely, reductions in physical activity, such as from cessation of training and bed rest, result in decreased lumen diameter and arterial CSA.5'6 Training and detraining adaptations occur over similar timeframes7; however, no intermediate data over a short-duration training and detraining period are available to confirm the rate at which these changes in vascular dimensions occur.