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 y) completed three 1-day trials: 1) rest (CON); 2) 8 x 1 min cycling at 90% peak power with 75 s recovery (HIIE); 3) cycling at 90% of the gas exchange threshold (MIE), one hour before consuming a high fat milkshake (1.50 g fat and 80 kJ•kg -1 ). Postprandial TAG, SBP and fat oxidation were assessed over four hours.RESULTS: Compared to CON, the incremental area under the curve for TAG (IAUC-TAG)was not significantly lowered in HIIE (P=0.