Exercise and Postprandial Plasma Triacylglycerol Concentrations in Healthy Adolescent Boys
Medicine & Science in Sports & Exercise
PURPOSE: Atherosclerosis is initiated in childhood. Therefore reducing postprandial triacylglycerol concentrations even in young people could potentially slow atherogenic progression. This study sought to investigate if continuous exercise and intermittent games activity would reduce postprandial triacylglycerol concentrations in adolescent boys. METHODS: Nineteen subjects were randomly assigned to either a Continuous exercise group (N = 10) or an Intermittent games activity group (N = 9) and
... group (N = 9) and underwent two, 2 d trials. Trials were performed a minimum of 7 days apart in a randomized order, consisting of a Rest trial and either a Continuous exercise or Intermittent games trial. In the rest trial subjects took no exercise on day 1. On day 1 of the exercise trial subjects completed four blocks (approximately 15 min each) of uphill treadmill walking or intermittent games activity with 3 min rest between each block. On day 2, subjects came to the laboratory after an overnight fast and finger prick blood samples were obtained in the fasted state. Subjects then consumed a test meal (1.25 g fat, 1.07 g carbohydrate, 0.20 g protein, and 67 kJ per kg body mass). Further blood samples were collected at 30 and 45 min and 1, 3, 4 and 6 h postprandially. RESULTS: The total area under the triacylglycerol versus time curve was lower on day 2 following exercise in both groups (Student's t-tests for correlated means, Continuous exercise group 14%, P = 0.050; Intermittent games group 26%, P = 0.002). 2 CONCLUSION: Both continuous exercise and intermittent games type activity reduce postprandial triacylglycerol concentrations in adolescent boys when performed the afternoon before ingesting a high fat meal.