Resting short-term heart rate variability measures predict the minimum heart rate during simulated diving, with the relationship appearing to be gender-dependent.
Observational (n=65)
Does resting heart rate variability predict cardiac response to simulated diving in healthy volunteers?
Cardiac response to simulated diving is dependent on resting autonomic regulation, with the relationship between resting HRV and diving response appearing to be gender-dependent.
A characteristic feature of the cardiac response to diving is the uncertainty in predicting individual course. The aim of the study was to determine whether resting regulatory heart rate determinants assessed before diving may be predictors of cardiac response in a simulated diving test. The research was conducted with 65 healthy volunteers (37 women and 28 men) with an average age of 21. 13 years (20–27 years) and a BMI of 21. 49 kg/m2 (16. 60–28. 98). The simulated diving test consisted of stopping breathing after maximum inhaling and voluntarily immersing the face in water (8–10 °C) for as long as possible. The measurements included heart rate variability (HRV) analysis before diving and determination of the course of the cardiac response to diving—minimum and maximum heart rate (HR). The results indicate that minimum HR during diving (MINdiv) is dependent on the short-term HRV measures, which proves the strong influence of the parasympathetic system on the MINdiv. The lack of dependence of MINdiv on short-term HRV in women may be associated with differences in neurogenic HR regulation in women and men. In conclusion, cardiac response to simulated diving is strictly dependent on the autonomic regulation of the heart rhythm under resting conditions. The course of the cardiac response to diving and its relationship with resting HRV appears to be gender dependent.
Malinowski et al. (Fri,) conducted a observational in Healthy volunteers (n=65). Simulated diving test was evaluated on Minimum and maximum heart rate during diving. Resting short-term heart rate variability measures predict the minimum heart rate during simulated diving, with the relationship appearing to be gender-dependent.