Abstract
Summary The hematocrit and SGOT activity were determined in intact and splenectomized rats before and after swimming exercises of varying durations. The hematocrit was elevated in both the intact and splenectomized rats following a swimming exercise of any duration. SGOT activity was decreased by the very short duration swim (1 minute), but was elevated after swimming 5 minutes. A 10 or 15 minutes swim produced no significant change in the SGOT activity but swimming for 30, 60 or 120 minutes caused a progressive rise in such activity.