UNESP - Univ Estadual Paulista, Postgraduate Program in Physiotherapy, Presidente Prudente - São Paulo, 19060-900, Brazil.
Sci Rep. 2017 Oct 26;7(1):14091. doi: 10.1038/s41598-017-14540-4.
The post-exercise recovery period is associated with changes in autonomic modulation, which can promote an intercurrent-favorable environment. Caffeine has the ability to release catecholamines, but its effects after exercises is little explored. The present study aims to evaluate the acute effects of caffeine on the autonomic control and cardiorespiratory parameters after moderate intensity aerobic exercise. 32 young males (23,59 ± 3,45 years) were submitted to two protocols: Placebo and Caffeine, consisting of 15 minutes of rest, 30 minutes of exercise on a treadmill to 60% on VO2peak, followed by 60 minutes of recovery. Heart rate variability indices and cardiorespiratory parameters were determined at different times during the protocols. The RMSSD and SD1 indices recovered faster in placebo (p < 0.05). The systolic blood pressure differences were found from the 1st to the 5th minute of recovery with the caffeine protocol and from the 1st and 3rd minute with the placebo, whereas, for diastolic blood pressure, significant differences (p < 0.0001) were observed only for the caffeine protocol at the 1st and 3rd minutes of recovery. Caffeine was shown to be capable of delaying parasympathetic recovery but did not influence the behavior of the respiratory rate, oxygen saturation or frequency-domain HRV indices.
运动后的恢复期与自主神经调节的变化有关，这可以促进中间有利的环境。咖啡因具有释放儿茶酚胺的能力，但它在运动后的作用却鲜为人知。本研究旨在评估咖啡因对中等强度有氧运动后自主神经控制和心肺参数的急性影响。32 名年轻男性（23.59±3.45 岁）分为两组：安慰剂和咖啡因组，每组包括 15 分钟的休息，30 分钟在跑步机上进行运动，达到峰值摄氧量的 60%，然后进行 60 分钟的恢复。在不同时间点测定心率变异性指数和心肺参数。在安慰剂组中，RMSSD 和 SD1 指数恢复更快（p<0.05）。收缩压的差异从恢复的第 1 分钟到第 5 分钟在咖啡因组中出现，从第 1 分钟到第 3 分钟在安慰剂组中出现，而对于舒张压，仅在咖啡因组的第 1 分钟和第 3 分钟观察到显著差异（p<0.0001）。咖啡因被证明能够延迟副交感神经的恢复，但不影响呼吸频率、血氧饱和度或频域 HRV 指数的变化。
