1Department of Physical Education, State University of Ponta Grossa, Ponta Grossa, Brazil; 2Department of Physical Education, State University of Londrina, Londrina, Brazil; 3Institute of Sport and Exercise Science, James Cook University, Townsville, Australia; and 4Department of Histology, State University of Londrina, Londrina, Brazil.
J Strength Cond Res. 2014 Apr;28(4):1143-50. doi: 10.1519/JSC.0000000000000245.
The aim of this study was to investigate the heart rate variability (HRV) after resistance training with and without vascular occlusion. It was hypothesized that low intensity (LI) with vascular occlusion (LIO) would elicit comparable postexercise HRV responses with that of high intensity (HI) without vascular occlusion. Nine subjects undertook 4 experimental sessions of leg press exercise on different days: (a) 1 repetition maximum (1RM) test, (b) 4 sets of 8 repetitions + 1 set until exhaustion at 80% of 1RM without vascular occlusion (HI), (c) 4 sets of 16 repetitions + 1 set until exhaustion at 40% of 1RM with vascular occlusion (LIO), and (d) 4 sets of 16 repetitions + 1 set with the number of repetitions equal to the last set of LIO but at 40% of 1RM without vascular occlusion (LI). Heart rate variability was analyzed 10 minutes, 20 minutes, 30 minutes, 1 hour, 5 hours, and 24 hours after the HI, LIO, and LI sessions. The HI session increased the heart rate (HR) and reduced the root mean square of the successive difference of R-R intervals (RMSSD) and log-transformed high-frequency (lnHF) power during prolonged recovery (HR = 5 hours; RMSSD = 30 minutes; lnHF = 1 hour) at a greater magnitude when compared with LIO and LI. Despite the same intensity of exercise for LIO and LI, the occlusion delayed the recovery of HR and HRV variables. Postexercise blood lactate concentration was moderate to strongly correlated with peak HR (r = 0.87), RMSSD (r = -0.64), and lnHF (r = -0.68). This study has demonstrated that LIO was able to reduce cardiac autonomic stress when compared with HI.
本研究旨在探讨抗阻训练结合和不结合血管闭塞时的心率变异性（HRV）。研究假设低强度（LI）结合血管闭塞（LIO）与高强度（HI）不结合血管闭塞时的运动后 HRV 反应相当。9 名受试者在不同的日子进行了 4 次腿部按压运动的实验：（a）1 次重复最大（1RM）测试，（b）4 组 8 次重复+1 组直至衰竭，强度为 80%的 1RM 不结合血管闭塞（HI），（c）4 组 16 次重复+1 组直至衰竭，强度为 40%的 1RM 结合血管闭塞（LIO），（d）4 组 16 次重复+1 组，重复次数与 LIO 的最后一组相同，但强度为 40%的 1RM 不结合血管闭塞（LI）。在 HI、LIO 和 LI 运动后 10 分钟、20 分钟、30 分钟、1 小时、5 小时和 24 小时分析了心率变异性。与 LIO 和 LI 相比，HI 运动在长时间恢复过程中增加了心率（HR），降低了相邻 R-R 间期均方根差（RMSSD）和对数变换高频（lnHF）功率（HR=5 小时；RMSSD=30 分钟；lnHF=1 小时），幅度更大。尽管 LIO 和 LI 的运动强度相同，但闭塞延迟了 HR 和 HRV 变量的恢复。运动后血乳酸浓度与峰值 HR（r=0.87）、RMSSD（r=-0.64）和 lnHF（r=-0.68）中度至高度相关。本研究表明，与 HI 相比，LIO 能够减轻心脏自主神经应激。
