The average American watches 26 to 30 hours of television each week, which translates to roughly four hours a day. But can a person be addicted to TV? When watching television, people usually report feeling tranquil and passive. Indeed, numerous studies have found that TV increases alpha brain waves, which correspond with relaxation. At the same time, it reduces beta waves, which are associated with mental alertness. Humans spend most of their days in a beta state, which may explain why television, with its alpha-inducing pull, is so appealing. In addition, the loud noises and rapidly shifting images of TV prompt a response called the orientation reflex. This biological reflex evolved to protect humans from potential predators, by causing them to be hyper-alert to stimulating events. But when that focus is on television, the value of the orientation reflex is lost. Despite these facts, true addiction requires a person to be physically or psychologically dependent on a substance, and most researchers agree that this cannot be the case of even the most avid of TV watchers. That doesn't mean that watching unlimited amounts of television is wise, however! More than a dozen studies have shown a direct link between obesity and excessive television consumption. The fact that TV encourages inactivity while also fostering an environment in which to mindlessly eat, shows why this link exists. To curb time spent watching TV, it helps to only tune in for particular programs. This eliminates time spent mindlessly flipping through channels. Similarly, it's beneficial to sit down with the TV guide and plan out a detailed, weekly schedule for television consumption. Some people find that getting rid of the remote helps, as does keeping a list of other fun leisure activities close at hand. Whatever method the overzealous television watcher chooses to curb tube time is smart. After all, other activities are often more stimulating-both mentally and physically!