From the back of the package:
Know your own strength
Experience your own Gold's Gym personal trainer at home
A fun variety of Cardio workouts and Balance exercises
Burn calories, lose weight and feel great!
Gold's Gym: Cardio Workout (シェイプボクシング Wiiでエンジョイダイエット！, Shape Boxing: Wii de Enjoy! Diet) is an exercise video game for Nintendo's Wii video game console, developed by video game developer Rocket Company. Based on the "shape boxing" fitness regimen used at Kyoei Boxing Gym which includes shadowboxing, press-ups, and sit-ups, the game also features a diet management feature. Originally announced in mid-2007 as Wii Exercise with a release target of later that year, in May 2008, the game was stated to still be in an early stage of development. Though not originally intended to feature support for the Wii Balance Board, the feature was announced later. Shape Boxing was finally released in Japan on October 30, 2008. The game was licensed by Ubisoft for other regional markets, and released as in Europe as part of the publisher's My Coach series as My Fitness Coach: Cardio Workout, and released in North America and Australia as Gold's Gym: Cardio Workout, in partnership with the Gold's Gym fitness center chain.
Source: Wikipedia, "Gold's Gym: Cardio Workout", available under the CC-BY-SA License.