PROBLEM TO BE SOLVED: To provide a TGR5 activator, and further provide an endurance improver, a fatigue reducer, a muscle strength improver and a motor function improver.SOLUTION: A TGR5 activator contains, as an active ingredient, at least one plant extract selected from Mentha arvensis var. piperascens, Melissa officinalis, Origanum majorana, Zizyphus jujuba, persimmon leaf tea, Anethum graveolens, Mentha spicata, Bacopa monniera and Eriobotrya japonica leaf tea.SELECTED DRAWING: NoneCOPYRIGHT: (C)2019,JPO&INPIT【課題】TGR5活性化剤、更には持久力向上剤、疲労抑制剤、筋力向上剤及び運動機能向上剤の提供。【解決手段】ハッカ、レモンバーム、マジョラム、サンソウニン、柿の葉茶、ディル、スペアミント、バコパモニエラ及びビワ茶より選択される一種以上の植物の抽出物を有効成分とするTGR5活性化剤。【選択図】なし