Acute effects of blood flow restriction training at various arterial occlusion pressures on muscle activation, blood lactate responses, and RPE in healthy adult males

作者：Hao Zhu, Zhaowen Tan, Nianyun Zhang, Yang Li, Qi Hu · 发表于：Frontiers in Physiology · 年份：2025 · DOI：10.3389/fphys.2025.1620294 · 被引用次数：6 · 研究领域：Cardiovascular and exercise physiology、Heart Rate Variability and Autonomic Control、Thermoregulation and physiological responses

Background Blood flow restriction training (BFRT) can induce significant muscle activation and metabolic stress at low loads. However, the acute physiological and perceptual responses to different arterial occlusion pressures (AOPs) remain unclear. This study aimed to examine the effects of varying AOP levels on muscle activation, blood lactate concentration, and ratings of perceived exertion (RPE) during low-load resistance exercise in healthy young males. Methods Sixteen healthy males (20.4 ± 1.5 years) participated in a single-group, repeated-measures study. Each performed barbell back squats (20% 1RM) under four AOP conditions: 0%, 60%, 70%, and 80% AOP. Muscle activation (%MVC), blood lactate concentrations, and RPE were assessed. One-way and two-way repeated-measures ANOVAs were used to analyze the outcomes across pressure and time conditions. Results Muscle activation increased significantly at 70% and 80% AOP compared to 0% and 60% (e.g., semitendinosus: F (3, 45) = 15.79, p < 0.001, ηp 2 = 0.51, 95% CI [0.14, 0.40]), with no difference between 70% and 80% AOP. Blood lactate concentrations increased significantly post-exercise under 70% and 80% AOP (F (3, 45) = 4.82, p = 0.005, ηp 2 = 0.24, 95% CI [0.03, 0.22]), although the main effect of pressure was not significant across time points (F (3, 45) = 1.63, p = 0.192, ηp 2 = 0.08, 95% CI [0.01, 0.13]). RPE increased progressively with pressure (F (1.80, 26.94) = 25.34, p < 0.001, ηp 2 = 0.63, 95% CI [0.28,...