During the snowy winter months, it's hard to find the motivation to get outside, let alone to that hot yoga class you promised yourself you’d do. Never fear! Modern technology has an answer to your cross-training crisis: Exergames. These Nintendo Wii fitness video games come in many varieties (EA Sports Active, Your Shape with Jenny McCarthy, and Jillian Michaels Fitness Ultimatum 2010 are just a few) and all of them offer interactive, customizable features that let you tailor the program to your needs. EA Sports Active and Jillian Michaels Fitness Ultimatum 2010 both require the Wii controller or nunchuck and Wii balance board. Your Shape with Jenny McCarthy needs neither once the program begins, instead using a camera to track and compare your moves to your virtual trainer. And the whole time, Jenny McCarthy is cheering you on. Remember—these games aren't a substitute for your cross-training program, just a fun way to warm up when it’s cold outside.