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Updated: Aug 13, 2025
11:56
Training Rats to Voluntarily Dive Underwater: Investigations of the Mammalian Diving Response
Published on: November 12, 2014
12.4K
Heart Rate Variability at Rest Predicts Heart Response to Simulated Diving
Krzysztof S Malinowski1, Tomasz H Wierzba1, J Patrick Neary2
1Department of Physiology, Faculty of Medicine, Medical University of Gdansk, 80-210 Gdansk, Poland.
Biology
|January 21, 2023
Summary
Resting heart rate variability predicts cardiac response during simulated diving tests. Autonomic regulation influences heart rate changes, with gender-specific differences observed in this physiological response.
Area of Science:
- Physiology
- Cardiovascular Research
- Human Physiology
Background:
- The cardiac response to diving exhibits significant inter-individual variability.
- Predicting an individual's cardiac response to diving remains challenging.
- Understanding the determinants of this response is crucial for physiological assessments.
Purpose of the Study:
- To investigate if resting heart rate variability (HRV) parameters can predict the cardiac response during a simulated diving test.
- To explore the influence of autonomic nervous system regulation on the cardiac response to diving.
- To identify potential gender-specific differences in the relationship between HRV and diving response.
Main Methods:
- Sixty-five healthy volunteers (37 women, 28 men) underwent a simulated diving test involving facial immersion in cold water (8-10 °C) after maximal inhalation.
- Heart rate variability (HRV) was analyzed before the diving test to assess autonomic regulation.
- Minimum and maximum heart rates during the diving response were recorded and analyzed.
Main Results:
- Minimum heart rate during diving (MIN_div) was significantly correlated with short-term HRV measures, indicating strong parasympathetic influence.
- A lack of dependence of MIN_div on short-term HRV was observed in women, suggesting potential gender-based differences in neurogenic heart rate regulation.
- The study highlights a strong link between resting autonomic cardiac regulation and the physiological response to simulated diving.
Conclusions:
- Cardiac response to simulated diving is significantly influenced by autonomic heart rhythm regulation at rest.
- The relationship between resting HRV and the cardiac response to diving demonstrates a notable gender dependency.
- These findings underscore the importance of considering autonomic function and gender in understanding diving physiology.
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