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BIOELECTRICAL VECTOR ANALYSIS IN OBESE ADOLESCENTS.

João Martins de Oliveira Filho1, Péricles Soares Bernardes2, Guilherme Henrique Costa Serpa3

  • 1Centro Universitário de Anápolis, Anápolis, GO, Brazil.

Revista Paulista De Pediatria : Orgao Oficial Da Sociedade De Pediatria De Sao Paulo
|July 16, 2020
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Summary

Obese adolescents show higher hydration levels and increased phase angle (PA), with body mass index (BMI) inversely related to resistance and directly to PA. This suggests obesity is linked to altered body hydration status.

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Area of Science:

  • Human Physiology
  • Nutritional Science
  • Biomedical Engineering

Background:

  • Body hydration is crucial for physiological functions.
  • Obesity is a growing public health concern in adolescents.
  • Vectorial bioimpedance analysis (BIVA) offers a nuanced assessment of body composition and hydration.

Purpose of the Study:

  • To evaluate adolescent hydration using BIVA.
  • To investigate associations between obesity and BIVA parameters.

Main Methods:

  • Cross-sectional study of 489 adolescents (14-18 years).
  • Electric bioimpedance (BIA) measured resistance and reactance.
  • Calculated phase angle (PA), fat-free mass (FFM), and body fat (%BF); BIVA vectors classified hydration status.

Main Results:

  • Obese adolescents had lower resistance and reactance but higher PA and %BF.
  • BIVA vectors indicated greater hydration in obese males and females.
  • Higher PA was associated with a twofold increased likelihood of obesity.

Conclusions:

  • Obese adolescents exhibit hyperhydration.
  • Body Mass Index (BMI) shows an inverse relationship with resistance and a direct relationship with PA.
  • BIVA is a valuable tool for assessing hydration and body composition in obese adolescents.