Someone who's invigorated is filled with a new sense of energy or excitement. Your grandmother might look invigorated after her month-long vacation in Hawaii.
Use the adjective invigorated to describe a person who's glowing with health or whose eyes are shining with enthusiasm. Your cousins may be famous for their invigorated expressions, beaming with energy; or you may return from a long swim in a cold lake feeling invigorated. At the heart of invigorated is vigor, which means "health or strength." It comes from the Latin vigorem, "liveliness, activity, or force."