Experimental Studies on the Interrelationships of Nutrition and Physical Exercise:Effects of Prolonged Administration of Vitamin E on Running and Swimming Performances of Young Adult Rats. (Report 1)
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概要
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A long term experiment was conducted to evaluate the ergogenic effects of vitamin E and/or linoleic acid on the athletic performance of sedentary and exercising rats.Male albino rats, weighing approximately 80g, were divided into four dietary groups and fed one of these diets containing 20% of either beef tallow or safflower oil with and without supplementation of additional vitamin E (330mg/kg diet). Safflower oil was employed to provide linoleic acid to the diet.Ten rats from each dietary group were housed in conventional small cages and served as sedentary controls; another ten animals were allowed voluntary exercise in large individual activity cages equipped with a revolving wheel inside.During the period of 2 months on the experimental regimen, the urines of five rats from each group were collected at the ages of 45, 60 and 70 days for the assay of hydroxyproline which could be regarded as the endogenous indicator of growth and development.At the end of the experimental period, five rats from each group were sacrficed, and the antioxidant status was estimated from both the degrees of resistance of erythrocytes to hemolysis by dialuric acid and the amounts of peroxidation products of liver lipids (TBA value). The other five rats were forced to run to exhaustion at 5° incline on a motor driven treadmill (average speed of 16 meters per min). The survived rats were again forced to swim to exhaustion with a load equivalent to 2% of body weight in 32°C water, provided 10 days later they proved to have recovered from the preceding treadmill program as judged by their weight gains.A small but significant temporary increase of urinary hydroxyproline excretion was found in almost all rats at the age of 60 days in comparison with 45 and 70 days, suggesting that even in rats the turnover rate of collagen was accelerated with the impetus of growth at adolescence as seen in human beings. Vitamin E and exercise did not exert further effects on endogenous collagen metabolism.Decreased resistance of erythrocytes to hemolysis by dialuric acid was observed in the rats fed on the tallow diet without additional vitamin E, but there was no evidence of vitamin E deficiency in the animals fed on the safflower oil diet. Voluntary excercise did not promote the onset of vitamin E deficient symptoms.The rats, revoluting a wheel 500 to 1500 times daily throughout the experimental period, ran over 3-fold longer than the sedentary controls.Both vitamin E and linoleic acid resulted a small increase in the running capacity of the exercising rats, but these substances failed to prolong the running endurance time of the sedentary controls. Simultaneous administration of vitamin E and linoleic acid did not enhance the ergogenic effects of either vitamin E or linoleic acid given separately.No definite trends were found in swimming performance among the rats under different experimental conditions.
- 特定非営利活動法人 日本栄養改善学会の論文
特定非営利活動法人 日本栄養改善学会 | 論文
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