Within-measure variability Heart rate variability (HRV) is becoming one of the most widely used physiological variables to quantify the stress and recovery of soccer players. At rest, cardiac vagal modulation can be inferred by the logarithm of the root mean square of successive R-R interval differences (lnRMSSD), and it has been shown that higher values are related to higher training status (Proietti et al., 2017). Low variability within a measure relative to baseline may reflect inadequate recovery from previous exertion (Bricout et al., 2010; Muñoz-López, in press) or heightened stress. Reduced lnRMSSD may also be observed near or on match-day due to pre-competitive arousal (Ayuso-Moreno et al., im press). Thus, high variability between consecutive RR intervals within a measure, resulting in a high single day lnRMSSD measure is generally good.

中文翻译：

---

改变还是不改变？解读足球运动员的 HRV

测量范围内的变异性心率变异性 (HRV) 正在成为量化足球运动员压力和恢复的最广泛使用的生理变量之一。在休息时，心脏迷走神经调制可以通过连续 RR 间期差 (lnRMSSD) 的均方根的对数来推断，并且已经表明较高的值与较高的训练状态相关 (Proietti et al., 2017)。相对于基线的测量中的低变异性可能反映了从之前的运动中恢复不足（Bricout 等，2010；Muñoz-López，印刷中）或压力升高。由于赛前唤醒，也可能在比赛日附近或比赛日观察到 lnRMSSD 降低（Ayuso-Moreno 等人，impress）。因此，测量中连续 RR 间隔之间的高可变性，导致单天 lnRMSSD 测量通常是好的。