Your Shape: Fitness Evolved for the Xbox 360, Ubisoft's Kinect-powered fitness game, is a collection of fitness activities (surprise) that starts out by measuring your dimensions with the Kinect camera--reasonably accurately, from what we saw, displaying stats such as your height and the width of your hips and shoulders.

　　You appear onscreen as a colored silhouette, but we are told that the finished version of the game will include an option to have your real-time image onscreen working out, as captured by Kinect's camera. The introductory activity lets you kick balloon-like balls around the virtual floor and wave your arms, leaving trails of petals, to familiarize yourself with the motion tracking and the rectangle of floor the game requires you to keep within. (If another person walks in front of you while you're playing, his or her outline clips your silhouette in the game.)

　　The general categories on the menu are gym, fitness, and personal trainer exercises. We played the "zen energy" activity with a female personal trainer, set in a minimalist virtual zen garden. This is a mix of tai chi moves and yoga-style poses, in which you copy the personal trainer. As you attempt to replicate her moves, white dots and lines are overlaid on your arms or legs to highlight the skeletal tracking of your joints and bones, turning to green as your position matches the ideal position and giving you a score out of 100 percent.