Autonomic Recovery Is Delayed in Chinese Compared with Caucasian following Treadmill Exercise.
Autonomic Recovery Is Delayed in Chinese Compared with Caucasian following Treadmill Exercise.
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DOI：
10.1371/journal.pone.0147104
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发表时间：
2016
期刊：
影响因子：
3.7
通讯作者：
Fernhall B
中科院分区：
文献类型：
--
作者：
Sun P;Yan H;Ranadive SM;Lane AD;Kappus RM;Bunsawat K;Baynard T;Hu M;Li S;Fernhall B
与中国人相比，高加索人的心血管疾病（CVD）患病率更高，且CVD与自主神经功能有关。运动恢复过程中的自主神经功能在白种人和中国人之间是否存在差异尚不清楚。本研究调查了健康白种人和中国人急性跑步机运动后的自主神经恢复情况。62名参与者（30名白种人和32名中国人，其中50%为男性）以70%的心率储备进行了急性跑步机运动。心率变异性（HRV）和压力反射敏感性（BRS）分别在运动前5分钟、运动后30分钟和60分钟测量。采用频率[高（LnHF）和低频（LnLF）功率的自然对数，归一化高（nHF）和低频（nLF）功率的自然对数，以及LF/HF比值]和时域[连续差的均方根（RMSSD）， RMSSD的自然对数（LnRMSSD）和R-R间隔（RRI）]来评估HRV。自发BRS包括上下序列和上下序列。在运动前，各组HR、HRV和BRS参数均无差异。在运动恢复期间，观察到LnHF、nHF、nLF、LF/HF、LnRMSSD、RRI、HR和BRS （up-up）显著的逐场时间相互作用。从运动前到运动后30- 60分钟，中国人的LnHF、nHF、RMSSD、RRI和BRS （up-up）的下降以及LF/HF、nLF和HR的增加与白种人相比减弱。中国人在急性跑步机运动后表现出延迟的自主神经恢复。这种延迟的自主神经恢复可能是由于中国人更大的交感神经支配和延长的迷走神经退缩。试验注册：中国临床试验注册号ChiCTR-IPR-15006684
Caucasian populations have a higher prevalence of cardiovascular disease (CVD) when compared with their Chinese counterparts and CVD is associated with autonomic function. It is unknown whether autonomic function during exercise recovery differs between Caucasians and Chinese. The present study investigated autonomic recovery following an acute bout of treadmill exercise in healthy Caucasians and Chinese. Sixty-two participants (30 Caucasian and 32 Chinese, 50% male) performed an acute bout of treadmill exercise at 70% of heart rate reserve. Heart rate variability (HRV) and baroreflex sensitivity (BRS) were obtained during 5-min epochs at pre-exercise, 30-min, and 60-min post-exercise. HRV was assessed using frequency [natural logarithm of high (LnHF) and low frequency (LnLF) powers, normalized high (nHF) and low frequency (nLF) powers, and LF/HF ratio] and time domains [Root mean square of successive differences (RMSSD), natural logarithm of RMSSD (LnRMSSD) and R–R interval (RRI)]. Spontaneous BRS included both up-up and down-down sequences. At pre-exercise, no group differences were observed for any HR, HRV and BRS parameters. During exercise recovery, significant race-by-time interactions were observed for LnHF, nHF, nLF, LF/HF, LnRMSSD, RRI, HR, and BRS (up-up). The declines in LnHF, nHF, RMSSD, RRI and BRS (up-up) and the increases in LF/HF, nLF and HR were blunted in Chinese when compared to Caucasians from pre-exercise to 30-min to 60-min post-exercise. Chinese exhibited delayed autonomic recovery following an acute bout of treadmill exercise. This delayed autonomic recovery may result from greater sympathetic dominance and extended vagal withdrawal in Chinese. Trial Registration: Chinese Clinical Trial Register ChiCTR-IPR-15006684