title: The influence of 2 weeks of low-volume high-intensity interval training on health outcomes in adolescent boys.
abstract: The present study aimed to establish whether 2 weeks of high-intensity interval training would have a beneficial effect on aerobic fitness, fat oxidation, blood pressure and body mass index (BMI) in healthy adolescent boys. Ten adolescent boys (15.1 ± 0.3 years, 1.3 ± 0.2 years post-estimated peak height velocity) completed six sessions of Wingate-style high-intensity interval training over a 2-week period. The first session consisted of four sprints with training progressed to seven sprints in the final session. High-intensity interval training had a beneficial effect on maximal O2 uptake (mean change, ±90% confidence intervals: 0.19 L · min(-1), ±0.19, respectively), on the O2 uptake at the gas exchange threshold (0.09 L · min(-1), ±0.13) and on the O2 cost of sub-maximal exercise (-0.04 L · min(-1), ±0.04). A beneficial effect on the contribution of lipid (0.06 g · min(-1), ±0.06) and carbohydrate (-0.23 g · min(-1), ±0.14) oxidation was observed during sub-maximal exercise, but not for the maximal rate of fat oxidation (0.04 g · min(-1), ±0.08). Systolic blood pressure (1 mmHg, ±4) and BMI (0.1 kg · m2, ±0.1) were not altered following training. These data demonstrate that meaningful changes in health outcomes are possible in healthy adolescent boys after just six sessions of high-intensity interval training over a 2-week period.
authors.affiliation: a Children's Health and Exercise Research Centre, Sport and Health Sciences , University of Exeter , Exeter , UK.
authors.forename: Alan R
authors.initials: AR
authors.lastname: Barker
authors.forename: Josephine
authors.initials: J
authors.lastname: Day
authors.forename: Aaron
authors.initials: A
authors.lastname: Smith
authors.forename: Bert
authors.initials: B
authors.lastname: Bond
authors.forename: Craig A
authors.initials: CA
authors.lastname: Williams
mesh_terms: D000293:Adolescent; D001794:Blood Pressure; D015992:Body Mass Index; D050260:Carbohydrate Metabolism; D004734:Energy Metabolism; D006801:Humans; D050356:Lipid Metabolism; D008297:Male; D010084:Oxidation-Reduction; D010101:Oxygen Consumption; D010806:Physical Education and Training / Q000379:methods*; D010809:Physical Fitness / Q000502:physiology*