Key result
Girls with slower biological maturation at age 10 exhibited higher very-low-frequency waves and lower high-frequency components of heart rate variability than those with above-average development.
Why the study?
How do different rates of biological maturation affect heart rate autonomic regulation in girls aged 10-11?
Cohort (n=60)
How do different rates of biological maturation affect heart rate autonomic regulation in girls aged 10-11?
Girls with delayed biological maturation at age 10 show a relative lag in the functional development of cardiovascular autonomic regulation compared to their faster-maturing peers.
Delayed maturation linked to altered HRV may indicate autonomic lag in girls; hypothesis-generating and requires prospective confirmation before any clinical relevance.
The authors conducted a two-year study of 60 girls aged 10-11. The analysis of the features of heart rhythm autonomic regulation in girls with different biological maturation rates revealed the following. The girls with slower sexual and physical development rates at the age of 10 are marked with higher values of very-low-frequency (VLF) waves, lower values of the high-frequency component of HF than a group of children having the above-average level of physical and sexual development. The groups of 10-year-old girls with different physical and sexual development levels differ in basic anthropometric measurements, body composition parameters, and basal, specific, and norm-based metabolic rates. By the age of 11, girls with the due acquisition of secondary sexual characters demonstrate an increase in sympathetic influence and a decrease in parasympathetic effect on HR’s variability. The obtained data indicate a relative lag in the functional development of the cardiovascular system autonomic regulation in girls with the delayed acquisition of secondary sexual characters at the age of 10 compared to the group of children with the above-average level of physical and sexual development.
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Филатова et al. (2021) conducted a cohort in Heart rate autonomic regulation (n=60). Slower biological maturation vs. Above-average biological maturation was evaluated on Heart rhythm autonomic regulation (VLF and HF components). Girls with slower biological maturation at age 10 exhibited higher very-low-frequency waves and lower high-frequency components of heart rate variability than those with above-average development.
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