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Exercise intensity and postprandial health outcomes in adolescents
Ist Teil von
European journal of applied physiology, 2015-05, Vol.115 (5), p.927-936
Ort / Verlag
Berlin/Heidelberg: Springer Berlin Heidelberg
Erscheinungsjahr
2015
Link zum Volltext
Quelle
SpringerLink
Beschreibungen/Notizen
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.