title: Is the effect of prior exercise on postprandial lipaemia the same for a moderate-fat meal as it is for a high-fat meal?
abstract: Moderate-intensity exercise can lower the TAG response to a high-fat meal; however, the British diet is moderate in fat, and no study to date has compared the effect of such exercise on responses to high-fat and moderate-fat meals. The present work investigated the effect of brisk walking performed 13 h before intake of both high-fat and moderate-fat meals on postprandial plasma TAG concentrations. Eight inactive, overweight men completed four separate 2 d trials, i.e. rest (Con) or a 90-min treadmill walk (Ex) on the evening of day 1, followed by the ingestion of a moderate-fat (Mod) or high-fat (High) meal on the morning of day 2. High-fat meals contained 66 % of total energy as fat, while the percentage was 35 % for moderate-fat meals; both the meals were, however, isoenergetic. On day 2, venous blood was sampled in the fasted state, 30 and 60 min after ingesting the test meal and then hourly until 6 h post-meal. Exercise reduced plasma TAG concentrations significantly (P < 0·001), with no exercise × meal interaction (P = 0·459). Walking reduced the total TAG response to a high-fat meal by 29 % (relative to High Con); the same bout of exercise performed before ingesting a moderate-fat meal lowered total TAG by 26 % (compared with Mod Con). The ability of a single moderate-intensity aerobic exercise bout to lower postprandial TAG concentrations is just as great, in percentage terms, when the test meal ingested is of a moderate rather than a high fat content.
authors.affiliation: School of Sport and Exercise Sciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK.
authors.forename: Nicholas M
authors.initials: NM
authors.lastname: Hurren
authors.forename: Frank F
authors.initials: FF
authors.lastname: Eves
authors.forename: Andrew K
authors.initials: AK
authors.lastname: Blannin
mesh_terms: D000328:Adult; D019540:Area Under Curve; D001786:Blood Glucose / Q000378:metabolism; D004041:Dietary Fats / Q000378:metabolism*; D015444:Exercise; D006801:Humans; D006949:Hyperlipidemias / Q000378:metabolism*; D008297:Male; D008875:Middle Aged; D052756:Nutritional Sciences; D050177:Overweight; D019518:Postprandial Period / Q000502:physiology*; D013997:Time Factors; D014280:Triglycerides / Q000737:chemistry; D006113:United Kingdom
chemical_list: D001786:Blood Glucose; D004041:Dietary Fats; D014280:Triglycerides