Key result
A 12-day daily swimming test to exhaustion in rats significantly decreased the stress index from 76.7 to 44.4 (p=0.035), indicating a shift towards parasympathetic dominance.
Why the study?
Does a daily 12-day swimming test alter cardiointervalography indices in rats?
Does a daily 12-day swimming test alter cardiointervalography indices in rats?
Absolute Event Rate: 44.4% vs 76.7%
p-value: p=0.035
Regular intense physical stress in rats leads to parasympathetic dominance in heart rate variability and can induce cardiac arrhythmias.
This article assesses the dynamics of cardiointervalography indices in non-linear rats before and after a daily 12-day swimming test «until refusal». The model of physical stress in the swimming test led to a shift in the cardiointervalography indices to the prevalence of the parasympathetic nervous system function in experimental animals, which may be indicative of high functionality of a biological organism in response to regular exercise. After 12 days of physical exercise «until refusal» the electrocardiogram of rats revealed cardiac arrhythmias in the form of ectopic activity.
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Н. А. Скуратова (2014) studied Physical stress (n=10). Daily swimming test 'until refusal' vs. Baseline (before experiment) was evaluated on Stress Index (IN) (p=0.035). A 12-day daily swimming test to exhaustion in rats significantly decreased the stress index from 76.7 to 44.4 (p=0.035), indicating a shift towards parasympathetic dominance.
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