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- Title
Effect of energy expenditure on postprandial triacylglycerol in adolescent boys.
- Authors
Tolfrey, Keith; Bentley, Conor; Goad, Mary; Varley, Joanna; Willis, Sebastian; Barrett, Laura
- Abstract
This study examined the effects of 30 and 60 min of moderate intensity exercise on postprandial triacylglycerol concentration [TAG] in 11 healthy, 13-year-old boys. The boys completed three counterbalanced conditions. On day 1, they either rested (CON), or jogged for 30 min (EX30) or 60 min (EX60) at 55% peak $$ \dot{V}{\text{O}}_{2} . $$ Following a 12-h fast, on day 2 a capillary blood sample was taken for fasting [TAG] before a high fat milkshake was consumed. Further blood samples were taken every hour over a 6-h postprandial rest period for [TAG]. The estimated energy expenditure for EX30 (982 kJ) was doubled in EX60 (1967 kJ). Differences in fasting [TAG] between the conditions were small (ES = 0.23, P = 0.35). Differences in postprandial TAG over time between conditions were identified (ES = 0.41, P = 0.03). Mean [TAG] was lower in EX60 than CON (−33 to −3%, P = 0.03) with a similar strong trend for EX30 (−29 to 1%, P = 0.06); EX60 and EX30 were not different from each other (−21 to 14%, P = 0.62). The total area under the [TAG] versus time curve was different between conditions (ES = 0.42, P = 0.03). Again, EX60 was lower than CON (−31 to −2%, P = 0.02) with a strong trend for EX30 (−31 to 4%, P = 0.06); EX30 and EX60 were not different from each other (−17 to 16%, P = 0.58). This study shows for the first time that both 30 and 60 min of jogging, with energy expenditures equivalent to 982 and 1,967 kJ, attenuates postprandial [TAG] in adolescent boys, but not in a dose-dependent manner.
- Subjects
CALORIC expenditure; TRIGLYCERIDES; TEENAGE boys; EXERCISE intensity; REST periods; JOGGING
- Publication
European Journal of Applied Physiology, 2012, Vol 112, Issue 1, p23
- ISSN
1439-6319
- Publication type
Article
- DOI
10.1007/s00421-011-1936-x