Flatt Andrew A, Esco Michael R
Human Performance Laboratory, Department of Kinesiology, The University of Alabama, Tuscaloosa, AL, USA.
Human Performance Laboratory, Auburn University Montgomery, Montgomery, AL, USA.
Clin Physiol Funct Imaging. 2016 Sep;36(5):331-6. doi: 10.1111/cpf.12233. Epub 2015 Mar 9.
Resting heart rate variability (HRV) is a potentially useful marker to consider for monitoring training status in athletes. However, traditional HRV data collection methodology requires a 5-min recording period preceded by a 5-min stabilization period. This lengthy process may limit HRV monitoring in the field due to time constraints and high compliance demands of athletes. Investigation into more practical methodology for HRV data acquisitions is required. The aim of this study was to determine the time course for stabilization of ECG-derived lnRMSSD from traditional HRV recordings. Ten-minute supine ECG measures were obtained in ten male and ten female collegiate cross-country athletes. The first 5 min for each ECG was separately analysed in successive 1-min intervals as follows: minutes 0-1 (lnRMSSD0-1 ), 1-2 (lnRMSSD1-2 ), 2-3 (lnRMSSD2-3 ), 3-4 (lnRMSSD3-4 ) and 4-5 (lnRMSSD4-5 ). Each 1-min lnRMSSD segment was then sequentially compared to lnRMSSD of the 5- to 10-min ECG segment, which was considered the criterion (lnRMSSDC riterion ). There were no significant differences between each 1-min lnRMSSD segment and lnRMSSDC riterion , and the effect sizes were considered trivial (ES ranged from 0·07 to 0·12). In addition, the ICC for each 1-min segment compared to the criterion was near perfect (ICC values ranged from 0·92 to 0·97). The limits of agreement between the prerecording values and lnRMSSDC riterion ranged from ±0·28 to ±0·45 ms. These results lend support to shorter, more convenient ECG recording procedures for lnRMSSD assessment in athletes by reducing the prerecording stabilization period to 1 min.
静息心率变异性（HRV）是监测运动员训练状态时一个可能有用的指标。然而，传统的HRV数据收集方法需要在5分钟记录期之前有一个5分钟的稳定期。由于时间限制和运动员的高依从性要求，这个漫长的过程可能会限制现场的HRV监测。因此需要研究更实用的HRV数据采集方法。本研究的目的是确定从传统HRV记录中稳定心电图衍生的lnRMSSD的时间进程。对10名男性和10名女性大学越野运动员进行了10分钟的仰卧心电图测量。每个心电图的前5分钟按连续1分钟的间隔分别进行分析，如下：第0 - 1分钟（lnRMSSD0 - 1）、第1 - 2分钟（lnRMSSD1 - 2）、第2 - 3分钟（lnRMSSD2 - 3）、第3 - 4分钟（lnRMSSD3 - 4）和第4 - 5分钟（lnRMSSD4 - 5）。然后将每个1分钟的lnRMSSD片段依次与5至10分钟心电图片段的lnRMSSD进行比较，后者被视为标准（lnRMSSDCriterion）。每个1分钟的lnRMSSD片段与lnRMSSDCriterion之间没有显著差异，效应大小被认为微不足道（ES范围为0.07至0.12）。此外，与标准相比，每个1分钟片段的组内相关系数（ICC）接近完美（ICC值范围为0.92至0.97）。记录前值与lnRMSSDCriterion之间的一致性界限范围为±0.28至±0.45毫秒。这些结果支持通过将记录前的稳定期缩短至1分钟，采用更短、更方便的心电图记录程序来评估运动员的lnRMSSD。
