Abstract: Taking male mice as experimental objects, the strength increasing swimming models were built up. Jujube polysaccharide solution was administered to the mice by gavage. After 4 weeks, the contents of blood sugar, muscle glycogen, liver glycogen and blood lactic acid and the activities of creatine kinase, lactate dehydrogenase, superoxide dismutase and glutathione peroxide were determined. The results showed that the jujube polysaccharide can increase the contents of muscle glycogen and liver glycogen, reduce the accumulation of blood lactic acid after exhaustion, maintain the blood sugar constant, raise the activities of superoxide dismutase and glutathione peroxide in serum, reduce the activities of creatine kinase and lactate dehydrogenase in serum, and prolong the exhausting time of mice. It was proved that the jujube polysaccharide can alleviate sport fatigue.

Key words: jujube polysaccharide, swimming, sugar metabolization, serum kinase