We’ve all been there, settling into your seat for what you know will be a long, inactive flight. You’d think this would offer a busy professional a much needed physical restbite. But there are many ironies in wellness, one of them being that even a tired body doesn’t necessarily call for total inactivity; it’s active rest that keeps us fresh and revitalised. Sitting motionless for extended periods won’t just make you feel stiff; it can actually be dangerous. When you’re sedentary for hours on end, your body essentially goes into what we might call “aeroplane mode”, just like your phone.…