The findings by Mellecker and McManus1 are predictable. It is hardly surprising that children expend energy at a higher rate when they are moving than when they are sedentary. There is no reason to think that this fundamental principle of exercise physiology would not apply during video game playing, just as it does during performance of myriad other activities. Nonetheless, their study may help to launch a line of research that ultimately will enable us to address one of the true public health crises of the 21st century.
Russell R. Pate. Physically Active Video GamingAn Effective Strategy for Obesity Prevention?. Arch Pediatr Adolesc Med. 2008;162(9):895–896. doi:10.1001/archpedi.162.9.895