Short Sprints Accumulated at School Modulate Postprandial Metabolism in Boys
- 1 January 2020
- journal article
- research article
- Published by Ovid Technologies (Wolters Kluwer Health) in Medicine & Science in Sports & Exercise
- Vol. 52 (1), 67-76
- https://doi.org/10.1249/mss.0000000000002121
Abstract
Introduction This study examined the efficacy of maximal sprint running accumulated during a typical school day to modulate postprandial metabolism in adolescent boys. Methods Nineteen adolescent boys completed three 2-d experimental conditions: a standard-practice control (CON), an accumulated in-school sprint running (ACC), and a single block of afterschool sprint running (BLO). On day 1, a fasting capillary blood sample was taken at 0735 h in the school. Three subsequent postprandial blood samples were taken at predetermined times after consumption of standardized breakfast and lunch. During ACC, participants accumulated four sets of 10 x 30-m maximal-intensity sprint runs across natural breaks in lessons. During BLO, participants performed the same number of sprints (40) in a single after-school exercise session. The blood samples from day 1 were replicated on the day after exercise (day 2). Results On day 1, no significant differences in total area under the plasma triacylglycerol concentration versus time curve (TAUC-TAG) were observed between conditions (P = 0.126). However, TAUC-insulin was lower in ACC compared with BLO (-26%, effect size [ES] = 0.86, P = 0.001) and CON (-22%, ES = 0.72, P = 0.010). On day 2, TAUC-TAG was 12% lower after ACC (ES = 0.49; P = 0.002) and 10% lower after BLO (ES = 0.37; P = 0.019) compared with CON. No significant differences were observed between conditions on day 2 for postprandial insulin or glucose (P >= 0.738). Conclusion Four sets of 10 x 30-m sprints, accumulated in four separate bouts (<5 min) during the school day, reduced postprandial triacylglycerol and insulin concentrations in adolescent boys and may represent an effective in-school exercise strategy to promote metabolic health.This publication has 33 references indexed in Scilit:
- Global physical activity levels: surveillance progress, pitfalls, and prospectsThe Lancet, 2012
- The Pleasure and Displeasure People Feel When they Exercise at Different IntensitiesSports Medicine, 2011
- The effects of time and intensity of exercise on novel and established markers of CVD in adolescent youthAmerican Journal of Human Biology, 2011
- Establishing maximal oxygen uptake in young people during a ramp cycle test to exhaustionBritish Journal of Sports Medicine, 2009
- Nonfasting Triglycerides and Risk of Myocardial Infarction, Ischemic Heart Disease, and Death in Men and WomenJAMA, 2007
- Improving physical activity assessment in prepubertal children with high-frequency accelerometry monitoring: A methodological issuePreventive Medicine, 2007
- Trends in waist circumferences in young British children: a comparative studyInternational Journal of Obesity, 2004
- Physical activity pattern of children assessed by triaxial accelerometryEuropean Journal of Clinical Nutrition, 2004
- 8 Skeletal Muscle Lipoprotein LipaseExercise and Sport Sciences Reviews, 1998
- Atherogenesis: a postprandial phenomenon.Journal of the American College of Cardiology, 1979