title: Effects of Acute Supramaximal Cycle Exercise on Plasma FFA Concentration in Obese Adolescent Boys.
abstract: OBJECTIVE
  The aims of the present study are 1) to evaluate the free fatty acid (FFA) profile and 2) to determine the relative anaerobic and aerobic contributions to total energy consumption during repeated supramaximal cycling bouts (SCE) in adolescent boys with different body weight statuses.
  
  
  METHODS
  Normal-weight (NW), overweight (OW), and obese (OB) adolescent boys (n =15 per group) completed a SCE sessions consisted of 6 x 6s maximal sprints with 2 min of passive rest between each repetition. Plasma FFA levels were determined at rest, immediately after a 10 min warm-up, and immediately at the end of SCE. The anaerobic and aerobic contributions (%) were measured via repeated SCE bouts. Insulin resistance was calculated using the homoeostatic model assessment (HOMA-IR) index.
  
  
  RESULTS
  The FFA concentrations measured immediately after SCE were higher in the OB group than in the OW and NW (p<0.01 and p<0.01, respectively) groups. Moreover, the anaerobic contributions to SCE were significantly lower in obese adolescents (p<0.01) and decreased significantly during the 2nd, 3rd and 4th repetitions. The FFA levels were significantly associated with the HOMA-IR index and aerobic contribution among adolescent boys (r=0.83 and r=0.91, respectively, p<0.01).
  
  
  CONCLUSIONS
  In contrast to the NW and OW groups, there is an increase in lipid mobilization and sift to aerobic energy metabolism during SCE in the OB group.
authors.affiliation: School of Kinesiology and Leisure, Faculty of Health Sciences and Community Services, Université de Moncton, Moncton, New-Brunswick, Canada.
authors.forename: Georges
authors.initials: G
authors.lastname: Jabbour
authors.affiliation: School of Kinesiology and Leisure, Faculty of Health Sciences and Community Services, Université de Moncton, Moncton, New-Brunswick, Canada.
authors.forename: Horia-Daniel
authors.initials: HD
authors.lastname: Iancu
authors.affiliation: School of Kinesiology and Leisure, Faculty of Health Sciences and Community Services, Université de Moncton, Moncton, New-Brunswick, Canada.
authors.forename: Anne
authors.initials: A
authors.lastname: Paulin
authors.affiliation: Department of Kinesiology, University of Montreal, Montreal, QC, H3C 3J7, Canada.
authors.forename: Jean-Marc
authors.initials: JM
authors.lastname: Lavoie
authors.affiliation: Movement Sport and Health Sciences Laboratory, University of Rennes 2-ENS Cachan, Rennes, France.
authors.forename: Sophie
authors.initials: S
authors.lastname: Lemoine-Morel
authors.affiliation: Movement Sport and Health Sciences Laboratory, University of Rennes 2-ENS Cachan, Rennes, France.
authors.forename: Hassane
authors.initials: H
authors.lastname: Zouhal
mesh_terms: D000293:Adolescent; D001786:Blood Glucose; D004734:Energy Metabolism; D015444:Exercise; D005230:Fatty Acids, Nonesterified / Q000097:blood*; D006801:Humans; D007328:Insulin / Q000097:blood; D008297:Male; D009765:Obesity / Q000097:blood*; D050177:Overweight / Q000097:blood; D012737:Sex Factors
chemical_list: D001786:Blood Glucose; D005230:Fatty Acids, Nonesterified; D007328:Insulin