title: Resistance training and diastolic myocardial tissue velocities in obese children.
abstract: 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.
authors.affiliation: School of Sport Science, Exercise and Health, University of Western Australia, Crawley, Australia. louisenaylor@westnet.com.au
authors.forename: Louise Haleh
authors.initials: LH
authors.lastname: Naylor
authors.forename: Katie
authors.initials: K
authors.lastname: Watts
authors.forename: Joan Andree
authors.initials: JA
authors.lastname: Sharpe
authors.forename: Timothy William
authors.initials: TW
authors.lastname: Jones
authors.forename: Elizabeth Ann
authors.initials: EA
authors.lastname: Davis
authors.forename: Alisha
authors.initials: A
authors.lastname: Thompson
authors.forename: Keith
authors.initials: K
authors.lastname: George
authors.forename: James Michael
authors.initials: JM
authors.lastname: Ramsay
authors.forename: Gerry
authors.initials: G
authors.lastname: O'Driscoll
authors.forename: Daniel John
authors.initials: DJ
authors.lastname: Green
mesh_terms: 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