title: Antioxidant supplementation prevents exercise-induced lipid peroxidation, but not inflammation, in ultramarathon runners.
abstract: To determine if 6 weeks of supplementation with vitamins E and C could alleviate exercise-induced lipid peroxidation and inflammation, we studied 22 runners during a 50 km ultramarathon. Subjects were randomly assigned to one of two groups: (1) placebos (PL) or (2) antioxidants (AO: 1000 mg vitamin C and 300 mg RRR-alpha-tocopheryl acetate). Blood samples were obtained prior to supplementation (baseline), after 3 weeks of supplementation, 1 h pre-, mid-, and postrace, 2 h postrace and for 6 days postrace. Plasma levels of alpha-tocopherol (alpha-TOH), ascorbic acid (AA), uric acid (UA), F2-isoprostanes (F2-IsoPs), tumor necrosis factor alpha (TNF-alpha), interleukin-6 (IL-6), and C-reactive protein (CRP) were measured. With supplementation, plasma alpha-TOH and AA increased in the AO but not the PL group. Although F2-IsoP levels were similar between groups at baseline, 28 +/- 2 (PL) and 27 +/- 3 pg/ml (AO), F2-IsoPs increased during the run only in the PL group (41 +/- 3 pg/ml). In PL women, F2-IsoPs were elevated postrace (p <.01), but returned to prerace concentrations by 2 h postrace. In PL men, F2-IsoP concentrations were higher postrace, 2 h postrace, and 1, 2, 3, 4, and 6 days postrace (PL vs. AO group, each p <.03). Markers of inflammation were increased dramatically in response to the run regardless of treatment group. Thus, AO supplementation prevented endurance exercise-induced lipid peroxidation but had no effect on inflammatory markers.
authors.affiliation: Departments of Exercise and Sport Science, Oregon State University, Corvallis, OR 97731, USA. mastaloa@onid.orst.edu
authors.forename: Angela
authors.initials: A
authors.lastname: Mastaloudis
authors.forename: Jason D
authors.initials: JD
authors.lastname: Morrow
authors.forename: Dawn W
authors.initials: DW
authors.lastname: Hopkins
authors.forename: Sridevi
authors.initials: S
authors.lastname: Devaraj
authors.forename: Maret G
authors.initials: MG
authors.lastname: Traber
mesh_terms: D000293:Adolescent; D000328:Adult; D000975:Antioxidants / Q000008:administration & dosage / Q000494:pharmacology*; D001205:Ascorbic Acid / Q000008:administration & dosage / Q000097:blood / Q000494:pharmacology; D002097:C-Reactive Protein / Q000378:metabolism; D019587:Dietary Supplements; D015444:Exercise; D028441:F2-Isoprostanes / Q000097:blood; D005260:Female; D006801:Humans; D007249:Inflammation / Q000378:metabolism / Q000473:pathology*; D015850:Interleukin-6 / Q000097:blood; D015227:Lipid Peroxidation / Q000187:drug effects*; D008297:Male; D008875:Middle Aged; D012420:Running; D014409:Tumor Necrosis Factor-alpha / Q000378:metabolism; D014527:Uric Acid / Q000097:blood; D014810:Vitamin E / Q000008:administration & dosage / Q000494:pharmacology; D024502:alpha-Tocopherol / Q000097:blood
chemical_list: D000975:Antioxidants; D028441:F2-Isoprostanes; D015850:Interleukin-6; D014409:Tumor Necrosis Factor-alpha; D014810:Vitamin E; D014527:Uric Acid; D002097:C-Reactive Protein; D024502:alpha-Tocopherol; D001205:Ascorbic Acid