Before revision: alt=Biorhythm Chart|360x360px|The Biorhythm Chart when a person was born|thumbAccording to the theory of biorhythms, a person's life is influenced by rhythmic biological cycles that affect his or her ability in various domains, such as mental, physical, and emotional activity.
After revision: alt=Biorhythm Chart|360x360px|The Biorhythm Chart when a person was born|thumbAccording to the notion of biorhythms, a person's life is influenced by rhythmic biological cycles that affect his or her ability in various domains, such as mental, physical, and emotional activity.