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Universidad y Salud
Print version ISSN 0124-7107On-line version ISSN 2389-7066
Abstract
URBANO-CERDA, Sebastián et al. Heart rate variability in cardiac rhythm and anthropometric indices in university males of Santiago de Chile. Univ. Salud [online]. 2021, vol.23, n.3, pp.284-290. Epub Sep 01, 2021. ISSN 0124-7107. https://doi.org/10.22267/rus.212303.242.
Introduction:
Low heart rate variability (HRV) has been associated with autonomic imbalances and cardiovascular risk in various populations.
Objective:
To relate HRV and anthropometric indices in young, physically active university male students with low cardiometabolic risk.
Materials and methods:
A descriptive cross-sectional study, which included 10 men aged 23.15 ± 2.91 years, with a Body Mass Index (BMI) of 25.48 ± 2.19 kg/m2, and a Waist-Hip Ratio (WHR) of 0.81 ± 0.02. Resting heart rate variability was measured over a 5 minute period. A correlational analysis was performed between BMI and WHR with the low frequency/high frequency ratio (LF/HF), standard deviation of the instantaneous variation of RR intervals (SD1), and complexity of the RR intervals (α-1). In addition, statistical power (1-β) and effect size (Cohen's "d") were determined.
Results:
LF/HF is only significantly related to WHR (r=0.638; p=0.047; d=0.80), while SD1 and α-1 did not show any association with BMI and WHR.
Conclusions:
There is a parasympathetic predominance that suggests a protective mechanism on intra-abdominal adipose tissue related to WHR. Further studies are required to explain all the modulating variables of the heart rate variability.
Keywords : Autonomic nervous system; heart rate; body mass index; waist-hip ratio.