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Experimentally Comparative Study of Maca and American Ginseng for Relieving Physical Fatigue

GAO Shan,TONG Ying,XIONG Xiao-yan,ZHANG Yi,WU Shao-ping(Beijing Centres for Diseases Control and Prevention,Beijing 100013,China)  
Objective To study the effects of maca and american ginseng on relieving physical fatigue.Methods 4 experiments were carried out,in each of which 70 mice were used and they were divided into 7 groups: deionized water,0.04,0.4,1.2g/kg of maca,0.04,0.4,1.2g/kg of american ginseng,administrated to each group for 30 days,respectively.The four tests were used to determine swimming time with weight loading;serum urea instant after exercise;hepatic glycogen;and blood lactose before or instant after or 20 minutes after exercise.Results Compared with the control,0.4,1.2g/kg of maca could extend swimming time with weight loading in mice(P0.05,P0.01),0.4,1.2g/kg of american ginseng could extend swimming time with weight loading (P0.05,P0.01);maca had noeffects on serum urea(P0.05),1.2g/kg of american ginseng could reduce serum urea after exercise(P0.05);maca and american ginseng could increase hepatic glycogen;0.4,1.2g/kg of maca could decrease the fluctuation of blood lactose before and after exercise(P0.01),american ginseng had no effects on it.Conclusion Both maca and american ginseng can relieve physical fatigue,but they have different effects on blood lactose and serum urea in mice.
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