Composition for enhancing exercise performance, increasing muscle mass, improving muscle functions, or preventing or treating muscular disease containing Polygonum multiflorum Thunberg extract

A quasi-drug composition for enhancing exercise performance, increasing muscle mass, improving muscle function, or preventing or ameliorating muscular disease, comprising Polygonum multiflorum Thunberg extract or a compound represented by Formula 1 as an active ingredient below as an active ingredient:

A method for enhancing exercise performance, increasing muscle mass, improving muscle function, or preventing or treating a muscle disease comprising the step of administering or taking a composition comprising Polygonum multiflorum Thunberg extract or a compound represented by Formula 1 as an active ingredient below as an active ingredient to a subject in need there of: