The present invention addresses the problem of providing a physical activity promoter that includes lactic acid bacteria from the human gut and/or a treated product of such lactic acid bacteria, or a food product composition for promoting physical activity containing same. In order to resolve the foregoing problem, the present inventors administered killed Lactobacillus Gasseri OLL2809 lactic acid bacteria to mice, and thereupon had the novel discovery that in addition to the effect of inhibiting eosinophilic infiltration, the effect of increasing the amount of action was also present. In other words, the present inventors perfected the present invention having discovered that ingesting Lactobacillus Gasseri OLL2809 or a fermented product/treated product thereof promotes physical activity, and specifically increases the amount of activity and also increases muscle mass.
