My GP is worried about my dvt risk as I recently had quite a hefty lower body surgery after an accident and I also vape now and again. I keep being told to exercise on the plane - and not just rotating ankles in my seat - told to pace up and down. GP says everyone should do this, but in all seriousness, if everyone DID do this on an 11 hour flight (my next work trip) it would be a bit chaotic on the plane. Does anyone do this regularly? The exercise bit? I'm guessing I just need to walk to the toilet every hour and not fall asleep! Unless there's a more official regime!