It's a preliminary study, and they discuss the limitations, but I think it's a great start and one that future research can be built upon, especially with utilizing exergaming.
Here's the source and link to this article:
You may want to see this recent article from Preventing Chronic Disease, the online e-journal:
Preventing Chronic Disease (PCD) is a peer-reviewed journal established to disseminate knowledge and promote discussion among researchers and practitioners in the field of chronic disease prevention and health promotion. All issues are available electronically, free of charge to subscribers.
You can find PCD on the Web at: http://www.cdc.gov/pcd