Rodrigues J A L, Yamane A C, Gonçalves T C P, Kalva-Filho C, Papoti M, Júnior C R B
School of Nursing of Ribeirão Preto, USP - University of São Paulo (USP), Avenida Bandeirantes 3900, 14040-907 Ribeirão Preto, SP, Brazil.
School Physical of Education and Sports of Ribeirão Preto, USP - University of São Paulo (USP), Avenida Bandeirantes 3900, 14040-907 Ribeirão Preto, SP, Brazil.
Int J Cardiol Heart Vasc. 2019 May 16;23:100378. doi: 10.1016/j.ijcha.2019.100378. eCollection 2019 Jun.
Heart rate variability (HRV) has proven to be a powerful non-invasive tool to investigate cardiac autonomic control and, seems to be influenced by nutritional status and exercise practice. However, the acute effects of fed or fasting states on HRV and blood pressure (BP) during low-to-moderate intensity aerobic exercise are currently unknown. Therefore, we investigated the baseline values and behavior of HRV, BP, and heart rate (HR) before and after low-to-moderate intensity aerobic exercise in fed and fasted states in healthy adults.
12 healthy individuals with mean age (SD) 59.0 (9.1) years performed two tests on a treadmill at 80% of the mean velocity of the 6-min walking test separated by 48 h: 12 h fasted (FST) or 1 h fed (FED). HRV, BP and HR were analyzed at rest, posttest, and at the third, fifth, and seventh minutes of recovery.
HRV and HR presented no significant alterations between nutritional conditions. HR at baseline was not different between nutritional conditions. Diastolic blood pressure was increased during the fasted baseline state.
The results of the current study provide that 12 h overnight fasting does not seem to be enough to affect significant changes in the autonomic modulation in healthy adults submitted to low-to-moderate intensity aerobic exercise.
心率变异性（HRV）已被证明是一种用于研究心脏自主神经控制的强大非侵入性工具，并且似乎受营养状况和运动习惯的影响。然而，在低至中等强度有氧运动期间，进食或禁食状态对HRV和血压（BP）的急性影响目前尚不清楚。因此，我们调查了健康成年人在进食和禁食状态下进行低至中等强度有氧运动前后HRV、BP和心率（HR）的基线值及变化情况。
12名平均年龄（标准差）为59.0（9.1）岁的健康个体在跑步机上以6分钟步行试验平均速度的80%进行了两次测试，两次测试间隔48小时：12小时禁食（FST）或1小时进食（FED）。在静息状态、测试后以及恢复的第3、5和7分钟分析HRV、BP和HR。
营养状况之间HRV和HR无显著变化。营养状况之间基线时的HR无差异。禁食基线状态下舒张压升高。
本研究结果表明，对于进行低至中等强度有氧运动的健康成年人，12小时夜间禁食似乎不足以影响自主神经调节的显著变化。
