title: [Aerobic 12-week training reduces cardiovascular risk factors in overweight teenagers].
abstract: BACKGROUND
  Obesity and low cardiorespiratory fitness are risk factors for cardiovascular diseases and type 2 diabetes.
  
  
  OBJECTIVE
  To examine changes in cardiorespiratory fitness and cardiovascular risk factors after an exercise program without any dietary change in sedentary overweight teenagers.
  
  
  METHODS
  Fifteen obese young males (15.5 ± 0.8 years, 31.5 BMI ± 5.9 kg/m2) participated in this study. Subjects underwent anthropometric and metabolic measurements, peak oxygen consumption (VO2peak), and lipid profile before and after training. Exercise training consisted of treadmill exercise at 70-80% of heart rate maximal (HRmax) during 50 min, 3 days/week for 12 weeks. Before and after training 24-hour recall was recorded and caloric intake was calculated.
  
  
  RESULTS
  Participants did not change their dietary habits during the intervention. Aerobic training diminished the abdominal circumference (p < 0.05), body fat percentage (p < 0.01), and increased VO2peak (p < 0.001). No significant change in body weight, lipid profile, or blood glucose was observed after training.
  
  
  CONCLUSIONS
  Our study shows that 12 weeks of aerobic training improved cardiorespiratory fitness and decreased body fat percentage in overweight male teenagers.
authors: Departamento de Ciencias Médicas, División de Ciencias de la Salud, Campus León, Universidad de Guanajuato, León, Guanajuato, Gto.
authors: Katya
authors: K
authors: Vargas-Ortiz
authors: Departamento de Ciencias Médicas, División de Ciencias de la Salud, Campus León, Universidad de Guanajuato, León, Guanajuato, Gto.
authors: Maciste Habacuc
authors: MH
authors: Macías-Cervantes
authors: Departamento de Ciencias Aplicadas al Trabajo, División de Ciencias de la Salud, Campus León, Universidad de Guanajuato, León, Guanajuato, Gto.
authors: Francisco José
authors: FJ
authors: Díaz-Cisneros
authors: Departamento de Ciencias Médicas, División de Ciencias de la Salud, Campus León, Universidad de Guanajuato, León, Guanajuato, Gto.
authors: Victoriano
authors: V
authors: Pérez-Vázquez