A system and method (1000) for an interactive game is disclosed herein. The system (1000) preferably includes monitoring device (20) monitoring the vital signs of a user, and a computer (1420). The monitoring device (20) is preferably an article (25) having an optical sensor (30) and a circuitry assembly (35), and a pair of straps (26a and 26b). The monitoring device (20) preferably provides for the display of the following information about the user: pulse rate; blood oxygenation levels; calories expended by the user of a pre-set time period; target zones of activity; time; distance traveled; and/or dynamic blood pressure. The article (25) is preferably a band worn on a user's wrist, arm or ankle.