Departamento de Educação Física, Centro de Ciências Biológicas e da Saúde, Universidade Norte do Paraná, Londrina, Paraná, Brasil.
Clinics (Sao Paulo). 2011;66(3):453-8. doi: 10.1590/s1807-59322011000300016.
Several studies have reported the phenomenon of post-exercise hypotension. However, the factors that cause this drop in blood pressure after a single exercise session are still unknown.
To investigate the effects of aerobic exercise on the acute blood pressure response and to investigate the indicators of autonomic activity after exercise.
Ten male subjects (aged 25 ± 1 years) underwent four experimental exercise sessions and a control session on a cycle ergometer. The blood pressure and heart rate variability of each subject were measured at rest and at 60 min after the end of the sessions.
Post-exercise hypotension was not observed in any experimental sessions (P > 0.05). The index of parasympathetic neural activity, the RMSSD, only remained lower than that during the pre-exercise session after the high-intensity session (Δ = -19 ± 3.7 for 15-20 min post-exercise). In addition, this value varied significantly (P < 0.05) between the high- and low-intensity sessions (Δ = -30.7 ± 4.0 for the high intensity session, and Δ = -9.9 ± 2.5 for the low intensity session).
The present study did not find a reduction in blood pressure after exercise in normotensive, physically active young adults. However, the measurements of the indicators of autonomic neural activity revealed that in exercise of greater intensity the parasympathetic recovery tends to be slower and that sympathetic withdrawal can apparently compensate for this delay in recovery.
多项研究报告了运动后低血压现象。然而，单次运动后导致血压下降的因素仍不明确。
研究有氧运动对急性血压反应的影响，并研究运动后自主神经活动指标。
10名男性受试者（年龄25±1岁）在自行车测力计上进行了4次实验性运动和1次对照实验。在每次实验结束休息时及结束后60分钟测量每位受试者的血压和心率变异性。
在任何实验性运动中均未观察到运动后低血压（P>0.05）。副交感神经活动指标，即RMSSD，仅在高强度运动后低于运动前水平（运动后15 - 20分钟时Δ=-19±3.7）。此外，该值在高强度和低强度运动之间有显著差异（P<0.05）（高强度运动时Δ=-30.7±4.0，低强度运动时Δ=-9.9±2.5）。
本研究未发现血压正常、身体活跃的年轻成年人运动后血压降低。然而，自主神经活动指标的测量显示，在强度较大的运动中，副交感神经恢复往往较慢，且交感神经撤退显然可以弥补这种恢复延迟。
