Exercise of low energy expenditure along with mild energy intake restriction acutely reduces fasting and postprandial triacylglycerolaemia in young women

摘要

A single bout of prolonged, moderate-intensity endurance exercise lowers fasting and postprandial TAG concentrations the next day. However, thenTAG-lowering effect of exercise is dose-dependent and does not manifest after light exercise of low energy cost (,2MJ). We aimed to investigatenwhether superimposing mild energy intake restriction to such exercise, in order to augment total energy deficit, potentiates the hypotriacylglycer-nolaemic effect. Eight healthy, sedentary, premenopausal women (age 27·1 (SEM 1·3) years; BMI 21·8 (SEM 0·9) kg/m2n) performed two oral fatntolerance tests in the morning on two different occasions: once after a single bout of light exercise (100min at 30% of peak oxygen consumption;nnet energy expenditure 1·04 (SEM 0·01) MJ) coupled with mild energy intake restriction (1·39 (SEM 0·22) MJ) on the preceding day, and once afternresting coupled with isoenergetic feeding on the preceding day (control). Fasting plasma TAG, TAG in the TAG-rich lipoproteins (TRL-TAG)nand serum insulin concentrations were 18, 34 and 30% lower, respectively, after exercise plus diet compared with the control trial (P,0·05).nPostprandial concentrations of plasma TAG and TRL-TAG were 19 and 27% lower after exercise plus diet compared with the control conditionn(P,0·01), whereas postprandial insulin concentrations were not different. It is concluded that a combination of light exercise along with mildnhypoenergetic diet may be a practical and feasible intervention to attenuate fasting and postprandial triacylglycerolaemia, especially for peoplenwho cannot exercise for prolonged periods of time at moderate-to-high intensities, such as many sedentary individuals.