Title

Resistance Training and Diastolic Myocardial Tissue Velocities in Obese Children

Document Type

Article

Publication Date

2008

Abstract

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·m-2) or a nonexercise control intervention (n = 10, 13.6 ± 0.7 yr, BMI = 30.2 ± 2.6 kg·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·s-1, P< 0.01) in the presence of a decrease in E/E′ (8.17 ± 0.39 to 7.06 ± 0.30 cm·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.

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Medicine and Science in Sports and Exercise may be accessed from the National Library of Australia here


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