EN
The studies were carried out on 8 young pigs (30—45 kg of body weight) in order to assess the level of adrenalin, noradrenalin and cortisol in the plasma of animals forced to movement three times a day for 15 min at intervals of 45 min. The experiment lasted for 28 days. The blood was collected at day 1, 3, 7, 14 and 28 from the anterior intracranial vein. The indices of cellular immunity, i.e. the activity of neutral leukocytes (NBT) and the index of lymphocyte transformation were evaluated. It was found that prolonged intermittent physical stress brought about in young pigs a progressive decrease of the hormones and the immunological activity of leukocytes. No correlation between the level of cortisol and catecholamines was found.