Abstract: 58 volunteers (18 men, 40 women) were chosen to observe the antifatigued effect of protein in silkworm chrysalis in human body. 31 volunteers were treated with protein in silkworm chrysalis 0.3g/d, and the other 27 volunteers were given the same volume of placebo for 4 weeks. In this process, all volunteers did sport.Then measured sport and indexes pre- and post- experiment respectively. The results indicate that the protein in silkworm chrysalis has certain positive effect on volunteers: firstly, this protein neither produce the imbalance of urea accid in vivo significantly nor lead to hyperuricemia; secondly, this protein can attenuate the resulting elevation of blood lactic acid in the volunteers` body after sport and enhance the ability of antifatigue; in addition, this protein can enhance the maximum value of oxygen consumption and enforce the human body`s sport durability. These results demonstrate that protein in silkworm chrysalis has better antifatigued effect on the human body.

Key words: protein in silkworm chrysalis, antifatigue, sport, human body