title: Is energy intake altered by a 10-week aerobic exercise intervention in obese adolescents?
abstract: OBJECTIVE
  To examine energy intake adaptations to a 10-week aerobic exercise program in obese adolescents.
  
  
  METHODS
  Twenty-six 12-17year old obese adolescents were asked to cycle twice a week for an hour in a research laboratory. Body composition, aerobic fitness (submaximal fitness test) and energy intake (3-day food record) were assessed before and immediately after the 10-week intervention.
  
  
  RESULTS
  The average time spent pedaling per session was 55.3±12.1min for a mean energy expenditure of 2196±561kJpersession. The intervention produced significant improvements in percentage of body fat (44.5±10.6% vs. 43.4±9.8%; p<0.05) but no significant weight and fat-free mass change. Peak workload (79.5±20.8W vs. 87.3±17.6W; p<0.05) and peak heart rate (174.6±18.7bpm vs. 166.2±21.0bpm; p<0.01) were improved. The mean total daily energy intake (in kJ/day) showed a tendency to decrease through the intervention (7440±1744 to 6740±2124kJ; p=0.07) but a high inter-individual variability observed in the energy intake response to the intervention may explain the non-significant association between the energy intake response and weight loss.
  
  
  CONCLUSIONS
  A 10-week aerobic exercise program may result in a small decrease in energy intake and an associated decrease in percentage of body fat but no weight loss in obese adolescents. This lack of weight loss could be explained by a decrease in spontaneous energy expenditure outside the intervention sessions.
authors: Healthy Active Living and Obesity Research Group, Children's Hospital of Eastern Ontario Research Institute, Ottawa, Ontario, Canada. Electronic address: thiveldavid@hotmail.com.
authors: D
authors: D
authors: Thivel
authors: Healthy Active Living and Obesity Research Group, Children's Hospital of Eastern Ontario Research Institute, Ottawa, Ontario, Canada; School of Human Kinetics, Faculty of Health Sciences, University of Ottawa, Ottawa, Ontario, Canada.
authors: J P
authors: JP
authors: Chaput
authors: Healthy Active Living and Obesity Research Group, Children's Hospital of Eastern Ontario Research Institute, Ottawa, Ontario, Canada; School of Human Kinetics, Faculty of Health Sciences, University of Ottawa, Ottawa, Ontario, Canada.
authors: K B
authors: KB
authors: Adamo
authors: Healthy Active Living and Obesity Research Group, Children's Hospital of Eastern Ontario Research Institute, Ottawa, Ontario, Canada; School of Human Kinetics, Faculty of Health Sciences, University of Ottawa, Ottawa, Ontario, Canada.
authors: G S
authors: GS
authors: Goldfield
mesh_terms: D000293:Adolescent; D015992:Body Mass Index; D002149:Energy Intake / Q000502:physiology*; D004734:Energy Metabolism / Q000502:physiology; D015444:Exercise / Q000502:physiology; D005081:Exercise Therapy; D005260:Female; D006801:Humans; D008297:Male; D009765:Obesity / Q000503:physiopathology / Q000628:therapy*; D016896:Treatment Outcome
keywords: Energy expenditure; Energy intake; Pediatric obesity; Physical activity