Vitamin E, exercise, and the recovery from physical activity

Shephard, Roy J.; Campbell, Robin; Pimm, Peter; Stuart, Dylan Malone; Wright, George F

doi:10.1007/bf00449513

Cited by 42 publications

(9 citation statements)

References 9 publications

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“…The slight improvements in cardiorespiratory efficiency, as shown by the submaximal and maximal work tests, and the marked improvements in muscular endurance, as indicated by the motor fitness tests, were common to both groups and, so, were a training effect, despite the fact that it had been expected that the influence of training would have been eliminated. The results of this further trial again demonstrated there are no grounds for considering vitamin E as an ergogenic aid, A similar conclusion was reached by Shephard et al (8) and by Talbot Vitamin C. Some observations have been made that suggest vitamin C may have a connection with the ability of the body to perform physical work (14). A difficulty in assessing whether extra vitamin C will aid physical performance is the wide variation in the RDA of this vitamin.…”

Section: Vitaminssupporting

confidence: 66%

Need for Micro-nutrient Supplementation with Regard to Physical Performance

Sharman¹

1984

Int J Sports Med

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Section: Vitaminssupporting

confidence: 66%

Need for Micro-nutrient Supplementation with Regard to Physical Performance

Sharman¹

1984

Int J Sports Med

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“…Most of the studies that have examined vitamin E supplements and performance have used relatively large supplements, 400 mg alpha tocopherol or more per day, for several weeks. No significant improvements in maximal oxygen uptake (141,158), swimming performance (85,139,140), postexercise plasma lactate (85,141), or muscular strength and endurance (139,140,141) were found in vitamin E supplemented subjects compared to subjects receiving placebos. There appears to be some benefit to using vitamin E in hypoxic environments such as mountain climbing at high altitudes (up to 8,000 m).…”

Section: Vitamin Supplements and Performancementioning

confidence: 91%

Vitamin and Mineral Supplementation to Athletes

Haymes

1991

International Journal of Sport Nutrition

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Vitamin and mineral supplements are frequently used by competitive and recreational athletes. Dietary deficiencies of most vitamins are not very common among athletes except in those who restrict their food intake in order to maintain body weight. Vitamins most likely to be deficient in the diet are folate, B,, B,,, and E. Biochemical evidence of vitamin deficiencies in some athletes have been reported for thiamine, riboflavin, and B,. When the diet is deficient, vitamin supplements may improve performance but are not likely to be effective if the dietary intake is adequate. Some female athletes' diets are low in calcium, iron, and zinc. Low calcium intake may reduce peak bone mass in young women. Iron deficiency may impair performance and needs to be corrected with an iron supplement. Zinc supplements that exceed the RDA interfere with the absorption of copper and lower HDLcholesterol.The use of vitamin and mineral supplements by athletes is widespread, especially in the United States. According to recent surveys of supplement use among athletes, more than 50% of elite women distance runners, nonelite women marathon runners and triathletes, and Ironman triathletes of both sexes consume vitamin and mineral supplements regularly (22,32,76,109,164). Thirty percent of nonelite men competing in marathons and triathlons report daily use of vitamin and mineral supplements (109, 164). Use of vitamin supplements is also prevalent among high school and college athletes-56% of males and 33% of females (1 18 In competitive events where the difference between winning and losing is measured in seconds or even a fraction of a second, poor nutrition could have a negative effect. Many athletes take vitamin and mineral supplements to ensure adequate nutrient intake. Other athletes believe that certain vitamins or minerals have ergogenic properties that will improve performance. In this review we will examine whether athletes need additional vitamins and minerals. There are three primary reasons why supplementing the diet with specific vitamins and/or minerals might be beneficial to athletes: (a) The athlete's diet is deficient in one or Emily M. Haymes is with the

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“…For example, vitamin E-supplemented rats exhibited no greater endurance during treadmill running than the rats on a normal diet. 29 In humans undergoing progressive exercise to exhaustion, no dierence was found in VO 2 max or exercise time before or after EXERCISE AND DEPLETION OF ANTIOXIDANTS vitamin E supplementation. 30 Also there was no dierence in swimming speed between vitamin Esupplemented swimmers and those receiving a placebo.…”

Section: Antioxidant Supplementationmentioning

confidence: 98%

Exercise, depletion of antioxidants and antioxidant manipulation

Sadasivam

Anuradha

1998

Cell Biochem. Funct.

103

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Strenuous physical activity is known to increase the production of reactive oxygen species (ROS), associated with depletion of antioxidant defence. In the present work we evaluated the level of lipid peroxidation and antioxidant components in blood of sportsmen under resting conditions and compared the data obtained with those in age- and sex-matched sedentary controls. A significant increase was noted in the levels of thiobarbituric acid reactive substances (TBARS) and conjugated dienes while a decrease was observed in ascorbic acid and glutathione levels in sportsmen. alpha-Tocopherol was unaltered in plasma of sportsmen as compared to controls. The activity of superoxide dismutase was increased (52 per cent) and glutathione peroxidase was decreased (43 per cent) in the erythrocytes of sportsmen compared to controls. Basal glutathione levels were negatively correlated with conjugated dienes and maximal oxygen uptake (VO2max) of the subjects. Dietary supplementation with antioxidant vitamins has been shown to be beneficial in combating oxidative stress without enhancing performance while exogenous glutathione was found to influence the endurance capacity of athletes. Such studies demonstrate the critical role played by glutathione and suggest that intervention trials should include a mixture of antioxidants rather than a single antioxidant.

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Vitamin E, exercise, and the recovery from physical activity

Cited by 42 publications

References 9 publications

Need for Micro-nutrient Supplementation with Regard to Physical Performance

Need for Micro-nutrient Supplementation with Regard to Physical Performance

Vitamin and Mineral Supplementation to Athletes

Exercise, depletion of antioxidants and antioxidant manipulation

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