Health officials at the Centers for Disease Control and Prevention (CDC) and the National Institutes of Health say that most health benefits of rigorous exercise still can be gained with moderate physical activity if done on a regular basis. ... And if you're already active, adding more time or substituting more vigorous activities for moderate ones might provide even more benefit.
――奈良県立医科大学 医学部 医学科 前期日程 ――2004年