The impact of low-intensity blood flow restriction endurance training on aerobic capacity, hemodynamics, and arterial stiffness (original) (raw)

Journal of Sports Medicine and Physical Fitness, 2021

Abstract

BACKGROUND To determine the effects of short-term low-intensity blood flow restriction (BFR) endurance training (ET) programs on measures of aerobic capacity, hemodynamics, and arterial stiffness in healthy young males. METHODS Thirty-nine healthy young recreationally active males participated in this short-term training study. They were randomly assigned to a high-intensity (HI; N=11; trained at 60 - 70% of VO2 reserve (VO2R)), low-intensity (LI; N=8; trained at 30-40% of VO2R), low-intensity with BFR (LI-BFR; N=10; trained at 30-40% of VO2R with BFR) or a non-exercising control group (N=10). The exercising subjects completed a 6-wk training protocol on a treadmill. Assessment of aerobic capacity (VO2max), hemodynamics and arterial stiffness were done before and after training. RESULTS Statistical analyses revealed a significant condition main effect (p< .05) for VO2max, indicating significant increase (p< .05) in VO2max in LI-BFR group compared to control. There were no significant changes for resting heart rate (RHR), systolic blood pressure (SBP), diastolic blood pressure (DBP), carotid-radial pulse wave velocity (PWV), and carotid-femoral PWV (p> .05). However, femoral-tibial PWV decreased significantly (p< .05) from baseline to post-training. CONCLUSIONS The results indicate that the application of BFR during ET may cause faster and/or greater adaptations in one or more physiological systems resulting in improved cardiorespiratory fitness.

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