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Effects of Exercise on Blood (Plasma) Concentrations of Vitamin A, Carotene and Tocopherols

Department of Environmental Medicine and Community Health, State University of New York College of Medicine at New York City, Brooklyn

Plasma levels of vitamin A, carotene and tocopherol were determined before and following a two-step exercise test on 30 occasions in 14 subjects, including 14 tests in a single subject.

The mean vitamin A level increased after exercise; the mean carotene and tocopherol levels decreased after an initial transitory elevation. Considerable variation was observed in respect to time, direction and magnitude of individual changes induced.

There was no apparent correlation between changes noted in the plasma levels and the physical condition of the subjects as estimated by the two-step test.