Key result
In pubertal girls, a decrease in body fat mass was significantly associated with increased very low-frequency heart rate variability, which correlated with basal metabolic rate (r=0.314, p=0.013).
Why the study?
Morphological changes during the pubertal growth spurt can model variations in body composition, particularly body fat mass, and associated changes in heart rate variability.
Observational (n=60)
Open-label
In pubertal girls, a decrease in body fat mass is associated with an increase in the absolute and relative power of very low-frequency oscillations in heart rate variability.
Body fat reduction during puberty in girls associates with higher VLF HRV power; leaves open any clinical or cardiometabolic implications.
BACKGROUND: morphological changes during the pubertal growth spurt can serve as a model for variation in body composition and, in particular, body fat mass (BFM) without any interventions in the human body and associated changes in heart rate variability (HRV). AIM: to study concomitant changes in the VLF spectrum of heart rate variability and body composition in girls during a Two-year study in the age range from 10 to 12 years. MATERIALS AND METHODS: electrocardiography, anthropometry, bioimpedansometry. RESULTS: we conducted a three-year open, uncontrolled, non-randomized study-observation of 60 girls in the age range from 10 to 12 years. This age range made it possible to obtain a wide variation in the rate of increase in body fat mass (BFM%) from negative to positive values. The oscillation power of the very low-frequency component (VLF, ms2 and %) in the HR variability increased statistically significantly with decreasing BFM %. In response to an increase in BMT%, reverse changes were observed. The VLF parameter (ms2) is associated with a positive moderate relationship with the basal metabolic rate (BM) at the age of 10 years (r=0.314, p=0.013). At the same age, the BFM % parameter is associated with an average negative relationship with the BM parameter (r=–0.681, p<0.001). CONCLUSION: in pubertal girls, the change in the composite body composition with a decrease in fat mass is associated with an increase in the absolute (ms2) and relative (%) power of oscillations of the very low-frequency VLF component in HRV.
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Филатова et al. (2024) conducted an observational in Healthy pubertal growth (n=60). Changes in body fat mass was evaluated on Oscillation power of the very low-frequency component (VLF) in heart rate variability. In pubertal girls, a decrease in body fat mass was significantly associated with increased very low-frequency heart rate variability, which correlated with basal metabolic rate (r=0.314, p=0.013).
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