Department of Physical Education & Exercise Science, Human Performance Laboratory, Auburn University at Montgomery, USA.
J Hum Kinet. 2013 Dec 31;39:85-92. doi: 10.2478/hukin-2013-0071. eCollection 2013 Dec 18.
The purpose of this investigation was to cross-validate the ithlete™ heart rate variability smart phone application with an electrocardiograph for determining ultra-short-term root mean square of successive R-R intervals. The root mean square of successive R-R intervals was simultaneously determined via electrocardiograph and ithlete™ at rest in twenty five healthy participants. There were no significant differences between the electrocardiograph and ithlete™ derived root mean square of successive R-R interval values (p > 0.05) and the correlation was near perfect (r = 0.99, p < 0.001). In addition, the ithlete™ revealed a Standard Error of the Estimate of 1.47 and Bland Altman plot showed that the limits of agreement ranged from 2.57 below to 2.63 above the constant error of -0.03. In conclusion, the ithlete™ appeared to provide a suitably accurate measure of root mean square of successive R-R intervals when compared to the electrocardiograph measures obtained in the laboratory within the current sample of healthy adult participants. The current study lays groundwork for future research determining the efficacy of ithlete™ for reflecting athletic training status over a chronic conditioning period.
本研究旨在通过心电图仪和 ithlete™ 心率变异性智能手机应用程序交叉验证，以确定超短期连续 R-R 间期均方根。在 25 名健康参与者中，同时通过心电图仪和 ithlete™ 在休息时确定连续 R-R 间期的均方根。心电图仪和 ithlete™ 得出的连续 R-R 间期均方根值之间没有显著差异（p>0.05），相关性非常好（r=0.99，p<0.001）。此外，ithlete™ 显示出估计的标准误差为 1.47，Bland-Altman 图显示协议范围从恒误差-0.03 以下的 2.57 到以上的 2.63。总之，ithlete™ 在当前健康成年参与者的实验室中与心电图仪测量值相比，似乎可以提供连续 R-R 间期均方根的准确测量值。本研究为未来研究奠定了基础，以确定 ithlete™ 在慢性适应期内反映运动训练状态的效果。
