Cardiovascular Effects of Aerobic Exercise With Self-Selected or Predetermined Intensity in Adolescents With Obesity

in Pediatric Exercise Science
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  • 1 University of Pernambuco
  • | 2 Faculdade de Comunicação Tecnologia e Turismo de Olinda
  • | 3 California State University San Bernardino
  • | 4 Federal Institute from Alagoas (IFAL)
  • | 5 University Nove de Julho
  • | 6 Nemours Children’s Specialty Care and Mayo Clinic College of Medicine
  • | 7 University of Alabama at Birmingham
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This study compared the effects of self-selected exercise intensity (SEI) versus predetermined exercise intensity (PEI) on blood pressure (BP) and arterial stiffness in adolescents with obesity. A total of 37 adolescents, 14.7 (1.6) years old, body mass index ≥95th percentile were randomly allocated into SEI (n = 18; 12 boys) or PEI (n = 19; 13 boys). Both groups exercised for 35 minutes on a treadmill, 3 times per week, for 12 weeks. The SEI could set the speed at the beginning of the sessions and make changes every 5 minutes. The PEI adolescents were trained at an intensity set at 60% to 70% of heart rate reserve. Brachial and central BP, pulse pressure, augmentation index, and carotid–femoral pulse wave were determined at baseline and after 12 weeks. Both groups reduced brachial systolic BP (SEI, Δ = −9 mm Hg; PEI, Δ = −4 mm Hg; P < .01), central systolic BP (SEI, Δ = −4 mm Hg; PEI, Δ = −4 mm Hg; P = .01), and central pulse pressure (SEI, Δ = −4 mm Hg; PEI, Δ = −3 mm Hg; P = .02) without differences between groups. No changes in the augmentation index and carotid–femoral pulse wave were observed in either group. The SEI induced similar changes in various cardiovascular outcomes compared with PEI in adolescents with obesity.

Barros and Freitas-Dias are with the Postgraduate Program in Hebiatrics, University of Pernambuco, Recife, Pernambuco, Brazil. Barros is also with the Faculdade de Comunicação Tecnologia e Turismo de Olinda, Olinda, Brazil. Prado is with the Department of Kinesiology, California State University, San Bernardino, CA, USA. Tenório is with the Federal Institute from Alagoas (IFAL), Alagoas, Pernambuco, Brazil. Tenório and Germano-Soares are with the Associated Graduate Program in Physical Education, University of Pernambuco, Recife, Pernambuco, Brazil. Ritti-Dias is with the Postgraduate Program in Rehabilitation Sciences, Universidade Nove de Julho (UNINOVE), São Paulo, Brazil. Balagopal is with Nemours Biomedical Research, Nemours Children’s Specialty Care, Jacksonville, FL, USA; and Division of Pediatrics, Mayo Clinic College of Medicine, Rochester, MN, USA. Hill is with the Department of Nutrition Sciences, University of Alabama at Birmingham, Birmingham, AL, USA.

Prado (wagner.prado@csusb.edu) is corresponding author.
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