title: The effect of acute exercise on endothelial function following a high-fat meal.
abstract: The transient impairment of endothelial function following a high-fat meal is well established. Brachial artery flow-mediated dilation (FMD) decreases between 2 and 6 h post ingestion. Whether this impairment can be reduced with acute aerobic exercise has not been investigated. The purpose of this study was to investigate if a single sustained aerobic exercise session can counteract the postprandial attenuation in brachial artery FMD associated with the ingestion of a high-fat meal. Eight apparently healthy adults (five men, three women), age 25.5 +/- 0.8 years, performed three treatment conditions in a counter-balanced design: (1) low-fat meal alone (LFM), (2) high-fat meal alone (HFM), and (3) one session of aerobic exercise presented 2 h after ingesting a high-fat meal (HFM-EX). The examination of brachial artery FMD was performed at baseline and 4 h following the ingestion of the meal for each treatment condition. A 3 x 2 (treatment x time) repeated measures ANOVA exhibited a significant interaction (P = 0.019). Preprandial FMDs were similar (P = 0.863) among all three treatment conditions. The FMDs following the LFM (7.18 +/- 1.31%) and HFM-EX (8.72 +/- 0.94%) were significantly higher (P = 0.001) than the FMD following the HFM (4.29 +/- 1.64%). FMD was significantly elevated above preprandial values following the HFM-EX (5.61 +/- 1.54 to 8.72 +/- 0.94%, P = 0.005) but was unchanged following the LFM (6.17 +/- 0.94 to 7.18 +/- 1.31%, P = 0.317) and the HFM (5.73 +/- 1.23 to 4.29 +/- 1.64%, P = 0.160). These findings suggest that a single aerobic exercise session cannot only counteract the postprandial endothelial dysfunction induced by the ingestion of a high-fat meal, but also increase brachial artery FMD in apparently healthy adults.
authors.affiliation: Department of Kinesiology, Clinical Exercise Physiology Laboratory, Indiana University, Bloomington, IN 47405, USA. jpadilla@indiana.edu
authors.forename: Jaume
authors.initials: J
authors.lastname: Padilla
authors.forename: Ryan A
authors.initials: RA
authors.lastname: Harris
authors.forename: Alyce D
authors.initials: AD
authors.lastname: Fly
authors.forename: Lawrence D
authors.initials: LD
authors.lastname: Rink
authors.forename: Janet P
authors.initials: JP
authors.lastname: Wallace
mesh_terms: D000328:Adult; D001916:Brachial Artery / Q000503:physiopathology; D004041:Dietary Fats / Q000008:administration & dosage*; D004730:Endothelium, Vascular / Q000502:physiology*; D015444:Exercise / Q000502:physiology*; D005081:Exercise Therapy / Q000379:methods*; D005260:Female; D006801:Humans; D006940:Hyperemia / Q000503:physiopathology; D008297:Male; D019518:Postprandial Period; D014664:Vasodilation / Q000187:drug effects
chemical_list: D004041:Dietary Fats