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[The action of carnitine derivatives on the work capacity of previously trained animals].

The effects of carnitine derivatives on the fitness of pretrained animals were studied. It was found that carnitine preparations such as L-carnitine, mildronate, and acetyl-L-carnitine used for 10 days statistically significantly increased the maximum running speed and its endurance, whereas DL-carnitine failed. The effects of carnitine preparations on speed endurance were in proportion to their antioxidative activity.