2. The Wii Fit is a video game developed by Nintendo for the Wii console. It is an exercise game consisting of activities using the Wii Balance Board peripheral. Wii Fit is currently the second best selling videogame in history (among games not packaged with a console) with 22.5 million copies sold as of October 30, 2009.

3. Wii Fit uses a unique platform peripheral called the Wii Balance Board, allowing the software to, among other uses, calculate body mass index (BMI) when told the user's height. The game has about 50 different activities,including yoga poses, push ups, and other exercises. Furthermore, Wii Fit allows its players to take body tests and compare their results without the game disc by installing the game's own "Wii Fit Channel" to the Wii Menu. Training on Wii Fit is divided into four categories: yoga, strength training, aerobics, and balance games. The activities provide a core workout, emphasizing controlled movements rather than overexertion. New activities can be unlocked by gaining "Fit Credits", which are accumulated in the "FitBank", a small piggy bank dedicated to keep track of time spent on Wii Fit. Minutes of Fit Credits are equal to the number of minutes doing an activity rather than the number of minutes of overall game play. At certain stages, new yoga poses or muscle workouts are unlocked based on the total time spent working out. Being the best at an activity with a 100% score, or playing an activity a certain number of times unlocks more rigorous versions of that activity.

4. Wii Fit was first revealed as Wii Health Pack, by Nintendo's chief game designer Shigeru Miyamoto, during a conference in mid-September 2006. Then described as a "way to help get families exercising together", the game idea had first been included in Miyamoto's original design document for a core group of games including Wii Sports and Wii Play, the entirety of which was scribbled onto a sheet of paper. As with other games designed by Miyamoto such as Nintendogs, the design of Wii Fit was influenced by activities in his daily life. He states that he and his family had become more health-conscious, going to the gym and tracking their weight.He found that it had become "fun over time to talk about these things", and as weighing oneself "didn't make much of a game", Nintendo decided to build games around the idea to mesh with the concept. The Wii Balance Board had been worked on for "almost two years", and was inspired by sumo wrestlers' need to weigh themselves with two scales. The game was announced under its current title at Nintendo's E3 press conference on July 11, 2007 and demonstrated by Miyamoto.

5. Wii Fit holds an 80% score on Game Rankings, aggregated from the scores of 52 media outlets, and got an average score of 81 on Moby Games. While the playful balance and aerobics minigames have generally been praised as simple fun, criticism for the game is aimed at its limitations in offering a serious workout regime. Despite many limitations, the game's friendly front-end and amount of activities are cited as appealing features to those who are perhaps seeking an introduction to daily exercise.In a review on IGN, Wii Fit was said to create "an environment in which working out is less daunting and as a result enjoyable -- fun, even." Wii Fit was awarded Best Use of the Balance Board by IGN in its 2008 video game awards.It was also nominated for multiple other awards, including Best New IP and Best Sports Game. There was minor controversy regarding Wii Fit in the UK, where two parents complained after the known limitations of BMI led to their daughter being labeled as overweight.Nintendo apologized over any offense caused by the terminology used in-game.

6. In Japan Wii Fit sold over a quarter of a million copies in its first week, and despite not being released outside Japan, Wii Fit reached the one million unit sales milestone by January 6, 2008, after being released on December 1 2007. As of January 4, 2009, it has sold 3,125,000 copies in Japan.It is the also the third best-selling game of Japan in 2008, as well as the best-selling Wii game in Japan of that year, selling 2,149,131 in that year.

7. In United Kingdom Prior to release, consumer reaction was also positive in the United Kingdom, with some retailers having to stop taking pre-orders due to its increasing popularity.Reports in the United Kingdom state that the Wii Fit launch had seen lines form nationwide.Retailer claimed that the game was also selling at a rate of 90 copies per minute.Nintendo UK have stated it is working hard to ensure that enough stock is available.In its first week of release, Wii Fit was the best-selling video game in the week, topping the all-format chart. Despite the game being sold at a higher price than average (£70, compared to an average of £35-40) it became the UK's sixth fastest selling console title according to Chart-Track/ELSPA and garnered over £16 million in sales. During the week beginning the 19 May, 2008, Wii Fit's sales in the UK fell from second in the all-formats chart to dropping out of the top 40 altogether, believed to be caused by Wii Fit being completely sold out.Subsequently, Nintendo UK promised to rectify the stock problems plaguing Wii Fit and vowed "We will end Wii Fit stock shortage".

8. In United States In the United States, pre-launch sales of Wii Fit were reported to have sold out at retailers Amazon.com, GameStop and Wal-Mart.After the initial release, reports showed stores selling out of Wii Fit nationwide. According to the NPD Group, Wii Fit sold 690,000 units in the US in May 2008, making it the country's third highest selling title for the month. The Wii Fit debuted in the United States at a suggested retail price of $89.99 for the base system unbundled with other accessories. As with the Wii Game Console itself, the demand for the Wii Fit has far outstripped the supply.

9. Overall According to the NPD Group, GfK Chart-Track, and Enterbrain, the game has sold 1.433 million copies in the United States, 624,000 in the United Kingdom, and 1.547 million in Japan, respectively, for a total of 3.604 million copies sold from January to July 2008.As of March 31, 2009, Nintendo has sold 18.22 million copies of Wii Fit worldwide. According to the NPD Group, GfK Chart-Track, and Enterbrain, the game has sold 1.283 million copies in the United States, 460,000 in the United Kingdom, and 346,000 in Japan, respectively, for a total of 2.089 million copies sold in the third quarter of 2008 (July–September). Wii Fit was the third best-selling game of December 2008 in the United States, selling in excess of 999,000 copies. It was also the third best-selling game of 2008 in the United States, selling in excess of 4.53 million. As of October 31, 2009, Wii Fit has sold 22.5 million units, placing it #2 on the all-time list of unbundled games.