[Effects of Shenqi preparation on anti-fatigue and anti-oxidant functions in mice]. 
To explore effects of Shenqi preparation,Traditional Chinese Medicine, on anti-fatigue and anti-oxidant functions.  One hundred and twenty mice were randomly divided into control group and 3 experimental groups.  The high, medium and low-dose of Shenqi preparation were given to the 3 experimental groups respectively, while distilled water to the control group for 15 d. The loaded swimming time, the level of lactate, serum urea nitrogen (SUN), muscle and liver glycogen, liver super-oxide dismutase (SOD), the content of malondialdehyde (MDA), glutathione peroxidase(GSH-Px) were assayed.  The loaded swimming test showed that the exhausted swimming time of 3 experimental groups [(296.0 +/- 25.3)s, (437.0 ĝ 38.9)s, (595.0 +/- 53.9)s respectively] was longer than that of control group [(231.0 +/- 22.5)s, P < 0.05, P < 0.01].  The liver glycogen content of the high and medium-dose experimental groups were higher than that of control group respectively (P < 0.01).  The SUN content of each experimental group was less than that of the control group (P < 0.01, P < 0.05).  Moreover,in the medium and high dose experimental groups, less accumulation of lactate was found (P < 0.01, P < 0.05), and the content of liver SOD and GSH-Px was higher (P < 0.01, P < 0.05).  The content of liver MDA in high-dose experimental group was less than that of the control group (P < 0.05).  Shenqi preparation, especially the high and medium-dose experimental groups, is able to improve exercise tolerance and has anti-fatigue and anti-oxidant effects in mice.