title: Effects of High-Intensity Training on Anaerobic and Aerobic Contributions to Total Energy Release During Repeated Supramaximal Exercise in Obese Adults.
abstract: BACKGROUND
  Studying relative anaerobic and aerobic metabolism contributions to total energy release during exercise may be valuable in understanding exercise energetic demands and the energetic adaptations that occur in response to acute or chronic exercise in obese adults. The aim of the present study is to evaluate the effects of 6 weeks of high-intensity training (HIT) on relative anaerobic and aerobic contributions to total energy release and on peak power output during repeated supramaximal cycling exercises (SCE) in obese adults.
  
  
  METHODS
  Twenty-four obese adults (body mass index = ± 33 kg.m-2) were randomized into a control group (n= 12) and an HIT group (n= 12). Accumulated oxygen deficits (ml.min-1) and anaerobic and aerobic contributions (%) were measured in all groups before and after training via repeated SCE. In addition, the peak power output performed during SCE was determined using the force-velocity test.
  
  
  RESULTS
  Before HIT, anaerobic contributions to repeated SCE did not differ between the groups and decreased significantly during the third and fourth repetitions. After HIT, anaerobic contributions increased significantly in the HIT group (+11 %,p< 0.01) and were significantly higher than those of the control group (p< 0.01). Moreover, the peak power obtained during SCE increased significantly in the HIT group (+110 W.kg-1,p< 0.01) and correlated positively with increases in anaerobic contributions (r= 0.9,p< 0.01).
  
  
  CONCLUSIONS
  In obese adults, HIT increased anaerobic contributions to energy release which were associated with peak power enhancement in response to repeated SCE. Consequently, HIT may be an appropriate approach for improving energy contributions and muscle power among obese adults.
authors.affiliation: School of Kinesiology and Leisure, Faculty of Health Sciences and Community Services, Université de Moncton, Moncton, NB E1A 3E9 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, NB E1A 3E9 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, NB E1A 3E9 Canada.
authors.forename: Anne
authors.initials: A
authors.lastname: Paulin
keywords: Aerobic; Anaerobic; Energy contribution; High-intensity training