Resistance training and diastolic myocardial tissue velocities in obese children.
OBJECTIVE
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.
Naylor
Louise Haleh
LH
School of Sport Science, Exercise and Health, University of Western Australia, Crawley, Australia. louisenaylor@westnet.com.au
Watts
Katie
K
Sharpe
Joan Andree
JA
Jones
Timothy William
TW
Davis
Elizabeth Ann
EA
Thompson
Alisha
A
George
Keith
K
Ramsay
James Michael
JM
O'Driscoll
Gerry
G
Green
Daniel John
DJ
D000293:Adolescent; D000328:Adult; D001823:Body Composition; D015992:Body Mass Index; D003971:Diastole; D004562:Electrocardiography; D005260:Female; D006352:Heart Ventricles / Q000473:pathology / Q000503:physiopathology*; D006801:Humans; D008297:Male; D053580:Muscle Strength; D009765:Obesity / Q000453:epidemiology / Q000503:physiopathology*; D015995:Prevalence; D055070:Resistance Training