title: Similar health benefits of endurance and high-intensity interval training in obese children.
abstract: OBJECTIVE
  To compare two modalities of exercise training (i.e., Endurance Training [ET] and High-Intensity Interval Training [HIT]) on health-related parameters in obese children aged between 8 and 12 years.
  
  
  METHODS
  Thirty obese children were randomly allocated into either the ET or HIT group. The ET group performed a 30 to 60-minute continuous exercise at 80% of the peak heart rate (HR). The HIT group training performed 3 to 6 sets of 60-s sprint at 100% of the peak velocity interspersed by a 3-min active recovery period at 50% of the exercise velocity. HIT sessions last ~70% less than ET sessions. At baseline and after 12 weeks of intervention, aerobic fitness, body composition and metabolic parameters were assessed.
  
  
  RESULTS
  BOTH THE ABSOLUTE (ET: 26.0%; HIT: 19.0%) and the relative VO(2) peak (ET: 13.1%; HIT: 14.6%) were significantly increased in both groups after the intervention. Additionally, the total time of exercise (ET: 19.5%; HIT: 16.4%) and the peak velocity during the maximal graded cardiorespiratory test (ET: 16.9%; HIT: 13.4%) were significantly improved across interventions. Insulinemia (ET: 29.4%; HIT: 30.5%) and HOMA-index (ET: 42.8%; HIT: 37.0%) were significantly lower for both groups at POST when compared to PRE. Body mass was significantly reduced in the HIT (2.6%), but not in the ET group (1.2%). A significant reduction in BMI was observed for both groups after the intervention (ET: 3.0%; HIT: 5.0%). The responsiveness analysis revealed a very similar pattern of the most responsive variables among groups.
  
  
  CONCLUSIONS
  HIT and ET were equally effective in improving important health related parameters in obese youth.
authors.affiliation: University of Sao Paulo, School of Medicine - Division of Rheumatology, Sao Paulo, Sao Paulo, Brazil.
authors.forename: Ana Carolina
authors.initials: AC
authors.lastname: Corte de Araujo
authors.forename: Hamilton
authors.initials: H
authors.lastname: Roschel
authors.forename: Andreia Rossi
authors.initials: AR
authors.lastname: Picanço
authors.forename: Danilo Marcelo Leite
authors.initials: DM
authors.lastname: do Prado
authors.forename: Sandra Mara Ferreira
authors.initials: SM
authors.lastname: Villares
authors.forename: Ana Lúcia
authors.initials: AL
authors.lastname: de Sá Pinto
authors.forename: Bruno
authors.initials: B
authors.lastname: Gualano
mesh_terms: D000886:Anthropometry; D001794:Blood Pressure / Q000502:physiology; D002648:Child; D015444:Exercise; D005080:Exercise Test; D005260:Female; D006262:Health; D006321:Heart / Q000503:physiopathology; D006339:Heart Rate / Q000502:physiology; D006801:Humans; D008168:Lung / Q000503:physiopathology; D008297:Male; D009765:Obesity / Q000378:metabolism / Q000503:physiopathology*; D010807:Physical Endurance / Q000502:physiology*