Graduation Program on Physical Education, Catholic University of Brasilia, Brasilia 71966-700, Brazil.
BMC Cardiovasc Disord. 2013 Nov 19;13:105. doi: 10.1186/1471-2261-13-105.
The aim of the present study was to evaluate the acute effects of resistance exercise (RE) leading to failure and RE that was not to failure on 24 h blood pressure (BP) and heart rate variability (HRV) in sedentary normotensive adult women.
Ten women (33.2 ± 5.8 years; 159.3 ± 9.4 cm; 58.0 ±6.4 kg; body fat 28.4 ± 2.8%) randomly underwent three experimental sessions: control (40 minutes of seated rest), RE leading to failure with 3 sets of 10 repetitions maximum (10-RM), and RE not to failure at 60% of 10-RM with 3 sets of 10 repetitions. Immediately post session BP and HRV were measured for 24 h.
Ratings of perceived exertion and heart rate were higher during the 10-RM session when compared with 60% of 10-RM (6.4 ± 0.5 vs 3.5 ± 0.8 and 123.7 ± 13.9 vs 104.5 ± 7.3 bpm, respectively). The systolic, diastolic and mean BP decreased at 07:00 a.m. after the 10-RM session when compared with the control session (-9.0 ± 7.8 mmHg, -16.0 ± 12.9 mmHg and -14.3 ± 11.2 mmHg, respectively). The root mean square of the squared differences between R-R intervals decreased after both the 60% of 10-RM and 10-RM sessions compared with the control session.
An acute RE session leading to failure induced a higher drop of BP upon awakening, while both RE sessions reduced cardiac parasympathetic modulation. RE may be an interesting training strategy to acutely decrease BP in adult women.
本研究旨在评估导致衰竭的抗阻运动（RE）和未导致衰竭的 RE 对久坐的血压正常的成年女性 24 小时血压（BP）和心率变异性（HRV）的急性影响。
10 名女性（33.2±5.8 岁；159.3±9.4cm；58.0±6.4kg；体脂 28.4±2.8%）随机接受了三种实验处理：对照（40 分钟坐姿休息）、导致衰竭的 RE（3 组 10 次最大重复次数，即 10-RM）和不导致衰竭的 RE（60%的 10-RM，每组 3 组，每组 10 次重复）。运动后立即测量 24 小时内的血压和 HRV。
与 60%的 10-RM 相比，10-RM 时的主观用力感觉和心率更高（6.4±0.5 vs 3.5±0.8 和 123.7±13.9 vs 104.5±7.3 bpm）。与对照相比，10-RM 后上午 7 点收缩压、舒张压和平均血压下降（-9.0±7.8mmHg、-16.0±12.9mmHg 和-14.3±11.2mmHg）。与对照相比，60%的 10-RM 和 10-RM 后 RMSSD 均降低。
导致衰竭的急性 RE 会导致觉醒后血压下降更多，而两次 RE 都会降低心脏副交感神经调节。RE 可能是一种有趣的训练策略，可在成人女性中急性降低血压。
