I'm talking about back and shoulder pain, numb bum syndrome and, more seriously,the joint and muscle aches that can be a warning of Repetitive Strain Injury.
It's incredibly easy to get wrapped up in writing at the computer without taking breaks. I have in the past had to resort to voice software to be able to write, both for pleasure at home and to do my day job. Through a mixture of extended exercises and physio I've been able to use a keyboard again for quite some while but in the last few weeks I've felt elbow and knuckle pains and have dug out my 'Dragon' software just in case.
What I try to do is have a break every hour from the screen and walk about the house vigorously swinging my arms or doing my stretches. A bit of housework in between writing bursts is also good - it has to be done anyway so why not work it into your health regime! I also try to have a walk at lunchtime - both on my 'proper' working days and on my writing days.
Does anyone else have any tips on staying fit and healthy as an author? I'm always glad to try new ways to stave off any problems.