Thanks neurospast,
you hit the nail right on , i have found that while i am at my computer desk if i move my head every five minutes or so and stretch my neck it does help,
my flight simulation is part of my life but i am trying to limit the time. and i now wear the neck support every time i fly.
i will take up your suggestion and look for some timer programme to remind me to chqange my posture very set period.
fathi