Key result
During whole-body cold exposure, the stress index decreased 4-fold in individuals with sympathicotonia and 1.5-fold in those with vagotonia compared to baseline.
Why the study?
Cold exposure increases sympathetic activity and blood pressure and can promote intensification of hypertension symptoms in winter, but the underlying mechanisms are poorly understood.
Does whole-body cold exposure alter cardiovascular parameters in healthy young men with different initial autonomic tones?
Population
30 healthy male volunteers aged 18–20 years
Comparison
Cold exposure at –20 0C vs rest at +20 0C across 3 autonomic regulation groups
Design
Experimental physiological study
Authors
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Highlights potential autonomic differences in cold response among youth; leaves open translation to clinical hypertension management.
Observational (n=30)
Does whole-body cold exposure alter cardiovascular parameters in healthy young men with different initial autonomic tones?
Individuals with baseline vagotonia exhibit a weaker baroreflex during cold exposure, potentially increasing their risk for cold-associated arterial hypertension.
Д. Б. Демин (2022) conducted an observational in Healthy (n=30). Whole-body cold exposure (-20 °C) vs. Baseline (rest at +20 °C) was evaluated on Dynamics of cardiovascular parameters (blood pressure, heart rate, heart rate variability). During whole-body cold exposure, the stress index decreased 4-fold in individuals with sympathicotonia and 1.5-fold in those with vagotonia compared to baseline.
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