MSSE E-pub sprint PPL paper Aug 2019.pdf (2.37 MB)
Short sprints accumulated at school modulate postprandial metabolism in boys
journal contribution
posted on 2019-08-19, 09:21 authored by James Smallcombe, Laura BarrettLaura Barrett, Lauren SherarLauren Sherar, Matthew J Sedgwick, Tommy Slater, Keith TolfreyKeith TolfreyINTRODUCTION: 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-day experimental conditions; a standard-practice control (CON); 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 07:35 in the school. Three subsequent postprandial blood samples were taken at predetermined times after consumption of standardised breakfast and lunch. During ACC, participants accumulated four sets of 10 × 30 m maximal-intensity sprint runs across natural breaks in lessons. During BLO, participants performed the same number of sprints (forty) 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%, 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 × 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.
History
School
- Design
- Sport, Exercise and Health Sciences
Published in
Medicine and Science in Sports and ExerciseVolume
52Issue
1Pages
67–76Publisher
Lippincott, Williams & WilkinsVersion
- AM (Accepted Manuscript)
Rights holder
© American College of Sports MedicinePublisher statement
This is a non-final version of an article published in final form in Smallcombe, J.W. ... et al., 2019. Short sprints accumulated at school modulate postprandial metabolism in boys. Medicine and Science in Sports and Exercise, 52(1):67–76, http://doi.org/10.1249/MSS.0000000000002121.Acceptance date
2019-08-02Publication date
2019-08-07Copyright date
2019ISSN
0195-9131eISSN
1530-0315Language
- en
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Dr Keith TolfreyUsage metrics
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