Chen Yung-Sheng, Pagaduan Jeffrey C, Bezerra Pedro, Crowley-McHattan Zachary J, Kuo Cheng-Deng, Clemente Filipe Manuel
Department of Exercise and Health Sciences, University of Taipei, Taipei, Taiwan.
Exercise and Health Promotion Association, New Taipei City, Taiwan.
Front Psychol. 2021 Feb 5;12:621399. doi: 10.3389/fpsyg.2021.621399. eCollection 2021.
Monitoring the daily change in resting heart rate variability (HRV) can provide information regarding training adaptation and recovery status of the autonomic nervous system (ANS) during training camps. However, it remains unclear whether postural stabilization is essential for valid and reliable ultra-short-term (HRV) recordings in short-term overseas training camps. Observational and longitudinal study. This study aimed to investigate ultra-short-term heart rate variability recordings under stabilization or post-stabilization periods in four overseas training camps. Twenty-seven U-20 male national team futsal players voluntarily participated in this study. Resting HRV was evaluated for 10 min during the early morning of each training camp. The natural logarithm of the root mean square of successive normal-to-normal interval differences (LnRMSSD) was used for comparisons. Time segments of HRV were divided into two periods with three measures within each: (1) the first 30-s (1st_30 s LnRMSSD), the first 60-s (1st_60 s LnRMSSD), and the 5-min standard (1st_5 min LnRMSSD) during stabilization; (2) the first 30-s (2nd_30 s LnRMSSD), the first 60-s (2nd_60 s LnRMSSD), and the 5-min standard (2nd_5 min LnRMSSD) after stabilization. The results demonstrated trivial to small ES (-0.03; 0.46), very large to nearly perfect ICC (0.76; 0.98), and narrow range of SEM (0.06; 0.31) when all time segments of HRV were compared to the 1st_5 min and 2nd_5 min HRV. Furthermore, the magnitude of the correlation coefficients ranged from very high to nearly perfect for all the time segments ( = 0.83; 0.97). The HRV posted excellent agreement in all time segments (bias = -0.05; 0.12) with/without postural stabilization. Trivial to small levels of effect size in all time segments of LnRMSSD (0.02; 0.41 ES) and LnRMSSD (-0.49; -0.02 ES) across overseas training camps was identified. The first 30 or 60-s LnRMSSD recordings can be used to evaluate daily cardiac-autonomic function during overseas training camps in futsal players. The process for stabilization seems to be unnecessary for measuring the morning resting LnRMSSD in overseas training camps among young adult futsal players.
监测静息心率变异性（HRV）的每日变化可以提供有关训练营期间自主神经系统（ANS）的训练适应性和恢复状态的信息。然而，在短期海外训练营中，姿势稳定对于有效且可靠的超短期（HRV）记录是否至关重要仍不清楚。观察性纵向研究。本研究旨在调查四个海外训练营中稳定期或稳定后期的超短期心率变异性记录。27名U-20男子国家五人制足球队球员自愿参与了本研究。在每个训练营的清晨对静息HRV进行10分钟的评估。连续正常到正常间隔差异的均方根的自然对数（LnRMSSD）用于比较。HRV的时间段分为两个时期，每个时期有三项测量：（1）稳定期的前30秒（第1个30秒LnRMSSD）、前60秒（第1个60秒LnRMSSD）和5分钟标准（第1个5分钟LnRMSSD）；（2）稳定后期的前30秒（第2个30秒LnRMSSD）、前60秒（第2个60秒LnRMSSD）和5分钟标准（第2个5分钟LnRMSSD）。结果表明，当将HRV的所有时间段与第1个5分钟和第2个5分钟HRV进行比较时，效应量微小至小（-0.03；0.46），组内相关系数非常大至几乎完美（0.76；0.98），标准误范围狭窄（0.06；0.31）。此外，所有时间段的相关系数大小范围从非常高到几乎完美（=0.83；0.97）。无论有无姿势稳定，HRV在所有时间段都具有极好的一致性（偏差=-0.05；0.12）。在海外训练营中，LnRMSSD（效应量0.02；0.41）和LnRMSSD（效应量-0.49；-0.02）的所有时间段均显示出微小至小的效应量水平。前30或60秒的LnRMSSD记录可用于评估五人制足球运动员在海外训练营期间的每日心脏自主神经功能。在年轻成年五人制足球运动员的海外训练营中，测量早晨静息LnRMSSD时，稳定过程似乎并非必要。
