Of all the new year's resolutions people make to themselves, the one that's promised most commonly to oneself is that of improving health and fitness. Whether it's improved diet, more exercise, or a combination of the two, most of us will have pledged to make a beneficial change to our lives. New year, new start, and all that jazz. Well, for the 2012-13 changeover, you'll have added incentive thanks to the Xbox 360 Nike+ Kinect Training Bundle, which will officially become available to download on Xbox Live on December 25th.