vigorous

Synonyms: active athletic ball of fire bouncing brisk dashing driving dynamic effective efficient enterprising exuberant flourishing forceful forcible hale hard-driving hardy healthy hearty intense lively lusty mettlesome peppy persuasive potent red-blooded robust rugged snappy sound spanking spirited steamroller strapping strenuous strong strong as an ox sturdy take-charge take-over tough vital zealous zippy

Antonyms: enervated idle impotent inactive lethargic weak