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- W2079203926 abstract "Because of the increased oxidative stress of aerobic exercise at high altitude, previous studies have suggested that vitamin E supplementation may elicit an ergogenic effect by reducing free radical reactions which impact components of the respiratory chain. To determine if vitamin E supplementation(800 I.U. per day for 4 wks in a double blind fashion) influenced exercise capacity or free radical production, 18 male subjects (placebo group n=8, treatment group n=10) were given two maximal exercise tests (25 W per 3.5 min until exhaustion) on an electrically braked ergometer before and after treatment. The two maximal exercise tests were randomly administered at normobaria (Pbar = 640 mmHg) and at a barometric pressure of 523 mmHg simulated in a hypobaric chamber. Venous blood was drawn before and after each exercise test and measured for alpha tocopherol and thiobarbituric acid reactive substances (TBARS) as an indicator of malondialdehyde and lipid peroxidation. MANOVA indicated no significant (p>0.05) differences in any metabolic variable at 50%, 60%, 70% 80%, 90% and 100% of VO2 max with vitamin E treatment. At 523 mmHg in the vitamin E treated group, lower (p=0.04) TBARS values (0.490 ± 0.050 nmol/ml) compared to the placebo group values(0.620 ± 0.050 nmol/ml) were observed. Our results suggest that vitamin E supplementation can reduce exercise induced free radical production from hypobaric exposure, but does not influence aerobic exercise performance either at normobaria or at simulated high altitude." @default.
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- W2079203926 date "1997-05-01" @default.
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- W2079203926 title "EXERCISE CAPACITY AND LIPID PEROXIDATION DURING HYPOBARIC EXPOSURE WITH VITAMIN E SUPPLEMENTATION 1418" @default.
- W2079203926 doi "https://doi.org/10.1097/00005768-199705001-01417" @default.
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