Resistance Training and Diastolic Myocardial Tissue Velocities in Obese Children

• Autores: Louise H. Naylor, Katie Watts, Joan Andree Sharpe, Thimoty William Jones, Elizabeth A. Davis, Alisha Thompson, Keith George, James Michael Ramsay, Gerry O'Driscoll, Daniel J. Green
• Localización: Medicine & Science in Sports & exercise: Official Journal of the American College of Sports Medicine, ISSN 0195-9131, Vol. 40, Nº. 12, 2008, págs. 2027-2032
• Idioma: inglés
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• Dialnet Métricas: 5 Citas
• Resumen

  • Purpose: The primary purpose of this study was to determine the effects of resistance exercise training on early diastolic myocardial velocities (E') in an obese pediatric population.

    Methods: Twenty-three obese adolescents were selected to participate in either a resistance-based training program (RT; n = 13, 12.2 +/- 0.4 yr, body mass index [BMI] = 32.5 +/- 1.9 kg[middle dot]m-2) or a nonexercise control intervention (n = 10, 13.6 +/- 0.7 yr, BMI = 30.2 +/- 2.6 kg[middle dot]m-2) for 8 wk. All subjects had repeated echocardiographic assessments to determine left ventricular (LV) geometry, early transmitral flow velocity (E), and E'.

    Results: LV mass and wall thicknesses did not significantly change with training or in controls. RT improved E' (11.9 +/- 0.5 to 13.3 +/- 0.5 cm[middle dot]s-1, P< 0.01) in the presence of a decrease in E/E' (8.17 +/- 0.39 to 7.06 +/- 0.30 cm[middle dot]s-1, P < 0.01), a marker of left atrial pressure. No changes were evident in the inactive control subjects.

    Conclusions: A supervised 8-wk RT exercise program improved early diastolic tissue velocity in obese children, independent of changes in LV morphology