First see:
http://en.wikipedia....titive_strain_injuryThen see workrave.org
It's really useful for chaps who tend to get very involved in work.
Workrave sort of gives a 30 second countdown timer and then locks your input devices so that you can see the normal screen but nothing works.
That's a "microbreak" - the default is one every three minutes!!
A rest break is about 5 minutes long and can be set at particular time intervals
You can also skip or postpone the break notifications
And then there is a set of pictures of a (virtual) young girl showing you various exercises. You simply have to do as she does, so you get time to give your brain a break.
See
http://workrave.org/screenshots/windows/very very useful for everyone.
hth
-2stepsback
Screenshots:
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