[The physical work capacity parameters of rodents studied by repeated high-speed swimming following uniform and nonuniform irradiation at high doses].

Physical fitness of irradiated (20-200 Gy) mice and rats was estimated by the method of repeated swimming at a fixed distance. Revealed was the reduction adequacy of the two indices, that is the starting time and the fatigue coefficient, the latter being changed more considerably. The dose of 80-100 Gy determined the threshold of the cerebral damage and caused an irreversible decrease in the physical fitness of rodents.