Abstract
Purpose
The effect of exercise intensity and sex on postprandial risk factors for cardiovascular disease in adolescents is unknown. We examined the effect of a single bout of work-matched high-intensity interval exercise (HIIE) and moderate-intensity exercise (MIE) on postprandial triacylglycerol (TAG) and systolic blood pressure (SBP) in adolescents.
Method
Twenty adolescents (10 male, 14.3 ± 0.3 years) completed three 1-day trials: (1) rest (CON); (2) 8 × 1 min cycling at 90 % peak power with 75 s recovery (HIIE); (3) cycling at 90 % of the gas exchange threshold (MIE), 1 h before consuming a high-fat milkshake (1.50 g fat and 80 kJ kg−1). Postprandial TAG, SBP and fat oxidation were assessed over 4 h
Results
Compared to CON, the incremental area under the curve for TAG (IAUC-TAG) was not significantly lowered in HIIE [P = 0.22, effect size (ES) = 0.24] or MIE (P = 0.65, ES = 0.04) for boys. For girls, HIIE and MIE lowered IAUC-TAG by 34 % (P = 0.02, ES = 0.58) and 38 % (P = 0.09, ES = 0.73), respectively, with no difference between HIIE and MIE (P = 0.74, ES = 0.14). Changes in TAG were not related to energy expenditure during exercise or postprandial fat oxidation. Postprandial SBP (total-AUC pooled for both sexes) was lower in HIIE compared to CON (P = 0.01, ES = 0.68) and MIE (P = 0.02, ES = 0.60), with no difference between MIE and CON (P = 0.45, ES = 0.14).
Conclusion
A single bout of HIIE and MIE, performed 1 h before an HFM, can meaningfully attenuate IAUC-TAG in girls but not boys. Additionally, HIIE, but not MIE, may lower postprandial SBP in normotensive adolescents.
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Abbreviations
- 95 % CI:
-
95 % confidence intervals
- CON:
-
Control
- CVD:
-
Cardiovascular disease
- EE:
-
Energy expenditure
- ES:
-
Effect size
- HFM:
-
High-fat meal
- HIIE:
-
High-intensity interval exercise
- HR:
-
Heart rate
- IAUC:
-
Incremental area under the curve vs time
- MIE:
-
Moderate-intensity exercise
- PPH:
-
Postprandial hypertension
- PPL:
-
Postprandial lipaemia
- RMR:
-
Resting metabolic rate
- SBP:
-
Systolic blood pressure
- TAG:
-
Triacylglycerol
- TAUC:
-
Total area under the curve vs time
- \({\dot{{V}}}\)O2 :
-
Oxygen consumption
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Acknowledgments
We thank the staff and participants at Exmouth Community College, Devon, UK for their participation in this project. This study was supported by the Sport and Health Sciences Research Committee, College of Life and Environmental Sciences, University of Exeter.
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Communicated by Massimo Pagani.
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Bond, B., Williams, C.A., Isic, C. et al. Exercise intensity and postprandial health outcomes in adolescents. Eur J Appl Physiol 115, 927–936 (2015). https://doi.org/10.1007/s00421-014-3074-8
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DOI: https://doi.org/10.1007/s00421-014-3074-8