Using Video Games for Fitness
"Physical activity falls into two main categories. Each affects the body in different ways. Aerobic exercise primarily works the cardiovascular system (the heart and blood vessels) and the lungs. Strength training, on the other hand, builds muscle mass. Playing motion-based video games involves, to a certain extent, both of these exercise groups."
Lots of people that play video games get carpal tunnel syndrome from pushing buttons all day, everyday.
"People who play a lot of video games may also develop this injury through constant flicking of the wrist and the pushing of controller buttons."