From the story: _"There are some kids who study hard and get outside and play hard and they are generally fine. The ones who are at major risk are the ones who study hard and don't get outside." The scientist said children who spent two to three hours outside every day were "probably reasonably safe". This could include time spent on the playground and walking to and from school. "The amount of time they spend on computer games, watching television can be a contributing factor. As far as we can tell it is not harmful in itself, but if it is a substitute for getting outside, then it is," said Professor Morgan.

_

So there you go, more evidence for the wisdom of that old saying "all things in moderation." Except for maybe fishing. Or hunting. There's no way too much of that could wreck your life, your career and your bank balance, right? Well, OK, but at least it won't make you go blind...