Queiroz Andréia C C, Gagliardi João F L, Forjaz Cláudia L M, Rezk Cláudio C
Exercise Hemodynamic Laboratory, School of Physical Education and Sport, University of São Paulo, São Paulo, Brazil.
J Strength Cond Res. 2009 Mar;23(2):571-8. doi: 10.1519/JSC.0b013e318196b637.
This study investigated clinic and ambulatory blood pressure (BP) responses after a single bout of low-intensity resistance exercise in normotensive subjects. Fifteen healthy subjects underwent 2 experimental sessions: control-40 minutes of seated rest, and exercise-6 resistance exercises, with 3 sets of as many repetitions as possible until moderate fatigue, with an intensity of 50% of 1-repetition maximum (1RM). Before and for 60 minutes after interventions, clinic BP was measured by auscultatory and oscillometric methods. Postintervention ambulatory BP levels were also measured for 24 hours. In comparison with preintervention values, clinic systolic BP, as measured by the auscultatory method, did not change in the control group, but it decreased after exercise (-3.7 +/- 1.6 mm Hg, p < 0.05). Diastolic and mean BP levels increased after intervention in the control group (+3.4 +/- 1.0 and +3.0 +/- 0.8 mm Hg, respectively, p < 0.05) and decreased in the exercise group (-3.6 +/- 1.7 and -3.4 +/- 1.4 mm Hg, respectively, p < 0.05). Systolic and mean oscillometric BP levels did not change after interventions either in the control or exercise sessions, whereas diastolic BP increased after intervention in the control group (+5.0 +/- 1.7 mm Hg, p < 0.05) but not change after exercise. Ambulatory BP behaviors after interventions were similar in the control and exercise sessions. Significant and positive correlations were observed between preexercise values and postexercise clinic and ambulatory BP decreases. In conclusion, in the whole sample, a single bout of low-intensity resistance exercise decreased postexercise BP under clinic, but not ambulatory, conditions. However, considering individual responses, postexercise clinic and ambulatory hypotensive effects were greater in subjects with higher preexercise BP levels.
本研究调查了血压正常受试者单次低强度抗阻运动后临床血压和动态血压（BP）的反应。15名健康受试者进行了2次实验：对照组——静坐休息40分钟；运动组——6组抗阻运动，每组进行3组，尽可能多重复直至中度疲劳，强度为1次重复最大值（1RM）的50%。干预前及干预后60分钟，采用听诊法和示波法测量临床血压。干预后还测量了24小时动态血压水平。与干预前值相比，听诊法测量的对照组临床收缩压未变化，但运动后降低（-3.7±1.6 mmHg，p<0.05）。对照组干预后舒张压和平均血压水平升高（分别为+3.4±1.0和+3.0±0.8 mmHg，p<0.05），运动组降低（分别为-3.6±1.7和-3.4±1.4 mmHg，p<0.05）。对照组和运动组干预后示波法收缩压和平均血压水平均未变化，而对照组干预后舒张压升高（+5.0±1.7 mmHg，p<0.05），运动后未变化。对照组和运动组干预后的动态血压行为相似。运动前值与运动后临床血压和动态血压降低之间存在显著正相关。总之，在整个样本中，单次低强度抗阻运动在临床条件下降低了运动后血压，但在动态血压条件下未降低。然而，考虑个体反应，运动前血压水平较高的受试者运动后临床和动态血压的降压效果更大。
