Postprandial lipemia: effects of exercise and restriction of energy intake compared

Abstract

The results suggest that the effect of exercise on postprandial lipid metabolism was greater than and different from that attributable to the energy deficit incurred.

Energy replacement attenuates the effects of prior moderate exercise on postprandial metabolism in overweight/obese men

“…Previous data, reporting that the TG-lowering effect of an exercise-induced energy deficit was greater than that of an equivalent dietary-induced energy deficit, suggested either that the effects of exercise on postprandial TG metabolism were independent of an energy deficit, or that dietaryinduced and exercise-induced energy deficits elicited different effects on postprandial metabolism. 10 Data from the present study, showing that the TG-lowering effect of prior exercise was only evident with an accompanying energy deficit, suggest that the latter interpretation is the correct one. The contrasting effect on TG metabolism of a dietary-or exercise-induced energy deficit may be related to specific body tissues in which the energy deficits occur.…”

“…9 However, it has previously been shown that energy deficit is not the sole determinant of the exercise-induced changes in postprandial metabolism, as a dietary-induced energy deficit induces a smaller attenuation in postprandial TG concentrations than an equivalent exercise-induced deficit. 10 It remains unclear whether favourable effects of exercise on postprandial metabolism are still evident when there is an increase in energy intake to compensate for energy deficits caused by exercise.…”

Effect of prior exercise on lipemia after a meal of moderate fat content

“…This is the first attempt to determine whether exercise can suppress the lipemic response to a meal approximating the macronutrient composition of the typical Western diet, that is (in terms of energy) 35-40% fat, about 47% carbohydrate, and about 16% protein (Williams, 2002). In fact, with the exception of Murphy et al (2000), who employed a diet providing 47% of energy from fat over the course of 1 day, all studies on the effect of exercise on postprandial lipemia have used test meals containing 60-93% of energy as fat, or 1.0-1.5 g/kg body mass (Maruhama et al, 1977;Schlierf et al, 1987;Klein et al, 1992;Aldred et al, 1994;Hardman & Aldred, 1995;Tsetsonis & Hardman, 1996a, b;Tsetsonis et al, 1997;Gill et al, 1998Gill et al, , 2001aGill et al, , b, 2002Hardman et al, 1998;Herd et al, 1998Herd et al, , 2000Herd et al, , 2001Zhang et al, 1998;Malkova et al, 1999;Gill & Hardman, 2000;Thomas et al, 2001;Petitt et al, 2003). Since the lipemic response to a fat meal is expected and has been shown to be positively related to the amount of fat ingested (Dubois et al, 1998), one could claim that exercise might not have a significant effect on lipemia after a meal of moderate fat content.…”

“…Physical exercise has been repeatedly shown to be effective to this end, especially when performed on the day before a fat-rich meal (Aldred et al, 1994;Tsetsonis & Hardman, 1996a, b;Tsetsonis et al, 1997;Gill et al, 1998Gill et al, , 2001aGill et al, , b, 2002Zhang et al, 1998;Malkova et al, 1999Malkova et al, , 2000Gill & Hardman, 2000;Herd et al, 2001;Thomas et al, 2001;Petitt et al, 2003). However, there does not seem to be a chronic effect extending beyond 2 days after the interruption of training Herd et al, 1998Herd et al, , 2000.…”

“…An alternative (or complementary) mechanism, decreased secretion of TG by the liver, has gained indirect experimental support Gill et al, 2001a). A third possibility, reduced output of dietary TG from the intestine, has been usually dismissed by the argument that too many hours have elapsed since the exercise stimulus (Tsetsonis & Hardman, 1996b;Gill & Hardman, 2000;Gill et al, 2001a). However, this hypothesis has not been tested.…”