Abstract
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 35minutes on a treadmill, 3 times per week, for 12weeks. The SEI could set the speed at the beginning of the sessions and make changes every 5minutes. 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 12weeks. Both groups reduced brachial systolic BP (SEI, Δ = -9mm Hg; PEI, Δ = -4mm Hg; P < .01), central systolic BP (SEI, Δ = -4mm Hg; PEI, Δ = -4mm Hg; P = .01), and central pulse pressure (SEI, Δ = -4mm Hg; PEI, Δ = -3mm 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.
Published Version
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