I am sitting here blogging.  I have been typing for two hours or so.  And do you know what?  My wrists hurt.

This is a sign I need to take a break.  In fact, I should have taken a break a long time ago.  You should take a break at least every half hour.  If you don't, you run the risk of getting Carpal Tunnel Syndrome.

Carpal Tunnel Syndrome is a painful, progressive condition related to the compression of a key nerve in the wrist.  It can start simply as pain in the hands progressing to numbness, loss of strength and finally loss of function.  Even though there is surgery available to reverse most cases, take a break every once in awhile - your wrists will thank you.