TY - JOUR
T1 - The effects of time and intensity of exercise on novel and established markers of CVD in adolescent youth
AU - Buchan, Duncan S.
AU - Ollis, Stewart
AU - Young, John D.
AU - Thomas, Non E.
AU - Cooper, Stephen Mark
AU - Tong, Tom K.
AU - Nie, Jinlei
AU - Malina, Robert M.
AU - Baker, Julien S.
PY - 2011
Y1 - 2011
N2 - Objectives: This article examines the effects of brief, intense exercise in comparison with traditional endurance exercise on both novel and traditional markers of cardiovascular disease (CVD) in youth. Methods: Forty seven boys and ten girls (16.4 ± 0.7 years of age) were divided into a moderate (MOD), high intensity (HIT), or a control group. The MOD group (12 boys, 4 girls) and HIT group (15 boys, 2 girls) performed three weekly exercise sessions over 7 weeks. Each session consisted of either four to six repeats of maximal sprint running within a 20 m area with 20-30 s recovery (HIT) or 20 min continuous running within a 20 m area at ~70% maximal oxygen uptake (VO2max). Results: Total exercise time commitment over the intervention was 420 min (MOD) and 63 min (HIT). Training volume was 85% lower for the HIT group. Total estimated energy expenditure was ~907.2 kcal (HIT) and ~4410 kcal (MOD). Significant improvements (P ≤ 0.05) were found in systolic blood pressure, aerobic fitness, and body mass index (BMI) postintervention (HIT). In the MOD group, significant (P ≤ 0.05) improvements were noted in aerobic fitness, percentage body fat (%BF), BMI, fibrinogen (Fg), plasminogen activator inhibitor-1, and insulin concentrations. Conclusions: These findings demonstrate that brief, intense exercise is a time efficient means for improving CVD risk factors in adolescents.
AB - Objectives: This article examines the effects of brief, intense exercise in comparison with traditional endurance exercise on both novel and traditional markers of cardiovascular disease (CVD) in youth. Methods: Forty seven boys and ten girls (16.4 ± 0.7 years of age) were divided into a moderate (MOD), high intensity (HIT), or a control group. The MOD group (12 boys, 4 girls) and HIT group (15 boys, 2 girls) performed three weekly exercise sessions over 7 weeks. Each session consisted of either four to six repeats of maximal sprint running within a 20 m area with 20-30 s recovery (HIT) or 20 min continuous running within a 20 m area at ~70% maximal oxygen uptake (VO2max). Results: Total exercise time commitment over the intervention was 420 min (MOD) and 63 min (HIT). Training volume was 85% lower for the HIT group. Total estimated energy expenditure was ~907.2 kcal (HIT) and ~4410 kcal (MOD). Significant improvements (P ≤ 0.05) were found in systolic blood pressure, aerobic fitness, and body mass index (BMI) postintervention (HIT). In the MOD group, significant (P ≤ 0.05) improvements were noted in aerobic fitness, percentage body fat (%BF), BMI, fibrinogen (Fg), plasminogen activator inhibitor-1, and insulin concentrations. Conclusions: These findings demonstrate that brief, intense exercise is a time efficient means for improving CVD risk factors in adolescents.
UR - http://www.scopus.com/inward/record.url?scp=79958152645&partnerID=8YFLogxK
U2 - 10.1002/ajhb.21166
DO - 10.1002/ajhb.21166
M3 - Article
AN - SCOPUS:79958152645
SN - 1042-0533
VL - 23
SP - 517
EP - 526
JO - American Journal of Human Biology
JF - American Journal of Human Biology
IS - 4
ER -