title: The effects of a novel high intensity exercise intervention on established markers of cardiovascular disease and health in Scottish adolescent youth.
abstract: This study examined the effects of high intensity exercise on physical fitness components and cardiovascular disease (CVD) risk factors in youth. Forty-one participants (15-17 years) were divided into a control and an intervention (high intensity exercise, HIT) group. The HIT group (15 boys, 2 girls) performed three weekly sessions over seven weeks consisting of either four to six repeats of maximal sprint running with 20-30 s recovery. The control group (20 boys, 4 girls) continued their normal activity patterns. All participants had indices of obesity and blood pressure (BP) recorded in addition to four physical performance measures pre-and post-intervention: cardiorespiratory fitness, muscular power, sprint speed and agility. In the HIT group, significant improvements in cardiorespiratory fitness (P<0.01) and agility (P<0.05) were noted. Participants in the control group, meanwhile, experienced a significant decrease in counter movement jump performance. These findings demonstrate that brief, intense exercise interventions are useful for improving indices of physical fitness in a short period of time.
  
  
  BACKGROUND
  The authors gratefully acknowledge Ms. Maini Tulokas in the Social Insurance Institution for her skilled help in preparing the figures.
  
  
  BACKGROUND
  this study was financially supported by the Chief Scientist Office for Scotland.
authors.affiliation: Institute of Clinical Exercise Science and Health, University of the West of Scotland , Hamilton, Scotland, UK.
authors.forename: Duncan S
authors.initials: DS
authors.lastname: Buchan
authors.affiliation: Institute of Clinical Exercise Science and Health, University of the West of Scotland , Hamilton, Scotland, UK.
authors.forename: John D
authors.initials: JD
authors.lastname: Young
authors.affiliation: Institute of Clinical Exercise Science and Health, University of the West of Scotland , Hamilton, Scotland, UK.
authors.forename: Alan D
authors.initials: AD
authors.lastname: Simpson
authors.affiliation: School of Human Sciences, Swansea University , Swansea, Wales;
authors.forename: Non E
authors.initials: NE
authors.lastname: Thomas
authors.affiliation: Cardiff School of Sport, UWIC , Cyncoed Campus, Cardiff, Wales, UK.
authors.forename: Stephen-Mark
authors.initials: SM
authors.lastname: Cooper
authors.affiliation: Institute of Clinical Exercise Science and Health, University of the West of Scotland , Hamilton, Scotland, UK.
authors.forename: Julien S
authors.initials: JS
authors.lastname: Baker
keywords: health; high intensity exercise; youth