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"Sport Medicine Journal" No.1 - 2005

Heart rate variability study in time and frequency domain at child with ages between 7-16 years old

Ionela Iancu1, Mirela Maria Vasilescu2, Luisa-Maria Dima1

1 Medicine University of Craiova, 2 University of Craiova, Kinetotherapy


The purpose of this study was to determinate the parameters of the heart rate variability (HRV), calculated in time domain and frequency domain and to find their relations with the parameters of growth, in healthy children. The experimental lot was composed of 100 healthy children, aged 7-16 years old , 5 boys and 5 girls for each group of age. At these children we have measured: height, weight, body surface and we have recorded the electrocardiogram on short time (2-5 minutes), in basal conditions. HRV parameters in time domain (mean, standard deviation, etc.) had a mean and unliniary correlation to growth parameters. HRV parameters in frequency domain (spectral analyses of low frequency-LF, high frequency-HF, power spectral density-PT, etc.) have, also, had a mean correlation to growth parameters, but they have indicated a great interindividual variability for every group of age and sex from the lot investigated.
We propose the values obtained for time and frequency domain parameters as reference values in order to estimate the growth of normal children, ill children and, also, for estimating the exercise or training of children that practice performance sports.

Key words:

heart rate variability, spectral analyses, exercise

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