Key result
Younger female engineers living in the North showed greater tension in adaptation mechanisms (66.7% vs 33.3%), whereas adaptation breakdown was significantly more frequent in the older age group (80%, p<0.001).
Why the study?
To evaluate heart rate variability in female gas industry engineers living in the North in relation to their age and duration of stay.
Cross-Sectional (n=102)
No
Answers are grounded in this paper and cite their sources.
Prolonged residence and working in northern climates among female engineers is associated with significant changes in heart rate variability, indicating altered autonomic regulation and potential cardiovascular adaptation stress.
Aim: to study heart rate variability in 102 women working as engineers at Surgut Research Industrial Institute in relation to duration of stay in the North and age. Methods: Heart rate variability was assessed using a diagnostic set "VNS-range" by the company 'Neurosoft'. Categorical data were analyzed using chi-squared tests. Statistica software was used for all calculations. Results: With increasing age, the values of the total power index (TP), the power of the very low frequency (VLF), and stress index (IS) significantly increase. The root-mean-square deviation of successive RR-intervals (SDNN), TP and the power of the high-frequency oscillation spectrum (HF) are significantly increase while the power of the low-frequency oscillation spectrum (LF) and the activation index of subcortical centers (IASC) decrease with increase in the duration of stay in the North. Thus, parasympathetic influences predominate with a tendency to vagotonia. At the same time, increases a state of stress to system of cardiohemodynamics. But, female engineers living in the North for up to 10 years have seen a significant tension in regulatory systems, since higher control levels are included in the regulation process, which leads to suppression of autonomous circuit activity and a decrease in the adaptive capabilities of the cardiovascular system. It can be assumed that the activation of the sympathetic link is considered as a nonspecific component of the adaptation reaction in response to various stressful effects. Decrease in heart rate variability indices indicates a changes in vegetative control and its regulation. The highest rates of HRV are recorded in healthy young people and living in the North for a short time. Decrease in these indicators may indicate adverse changes in the regulation of the cardiovascular system.
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Govorukhina et al. (2020) conducted a cross-sectional in Healthy female engineers in the oil and gas industry (n=102). Duration of residence in the North and age vs. Different age groups and durations of residence was evaluated on Tension of adaptation mechanisms (p=<0.001). Younger female engineers living in the North showed greater tension in adaptation mechanisms (66.7% vs 33.3%), whereas adaptation breakdown was significantly more frequent in the older age group (80%, p<0.001).
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