The application Workpace is very nice for that. You can create a personal
profile which suits your needs and monitor your behavior. There are a
variety of exercises included which you can do during the length of the
break.
It's not freeware but has a fair price if you are serious about it.
See
http://www.workpace.com/
--
Robert Sparnaaij [MVP-Outlook]
Coauthor, Configuring Microsoft Outlook 2003
http://www.howto-outlook.com/
Outlook FAQ, HowTo, Downloads, Add-Ins and more
http://www.msoutlook.info/
Real World Questions, Real World Answers
-----
"K Howell" <K
(E-Mail Removed)> wrote in message
news:1435FF77-8179-4FF4-B8F9-(E-Mail Removed)...
> I would like to set up an hourly reminder to remind myself to stretch or
> take
> a break from the computer. I frequently get involved in work projects and
> forget to take 'safety' breaks.