variability

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variability

a characteristic of SERVICES, namely that being delivered by people, the standard of their performance is open to variation.
References in periodicals archive ?
The role of heart rate variability in sports physiology.
Alteration of cardiac autonomic functions in patients with major depression: A study using heart rate variability measures.
Low heart rate variability, which indicates autonomic nervous system imbalance, was significantly associated with metabolic syndrome, according to a 2015 study that used data from the offspring cohort (n=1143) of the Framingham Heart Study.
Wavelet transform to quantify heart rate variability and to assess its instantaneous changes" J.
It is reasonable to speculate that the increase in heart rate, increased oxygen consumption, and muscular adaptations that result from the practice of climbing contributes to the increase in heart rate variability (as evidenced by higher rates in the time domain and the frequency observed in this study).
There was no significant difference in autonomic function tests and heart rate variability measurements between the patient and control groups.
Spiegel and his colleagues measured high-frequency heart rate variability (HF-HRV), which appears to be the best measure of parasympathetic tone, has been associated with longer survival in humans and animals, and is related to immune system functioning.
Assessment of sympathovagal imbalance by spectral analysis of heart rate variability in prehypertensive and hypertensive patients in Indian population.
Conclusion: Heart rate variability reduces with advancing age irrespective of the gender reflecting increased likelihood for developing ventricular arrhythmias in the predisposed patients.