原文: You’re on holiday but surreptitiously check your work emails the moment you wake up. You get anxious if there’s no Wi-Fi in the hotel or mobile phone signal up the mountain. You fret if your phone is getting low on power, and you secretly worry things will go wrong at work if you’re not there. These are the typical signs of “always on” stress induced by smart phone addiction.For some people, portable connected devices have liberated them from the constraints of the nine-to-five. Flexible working has given them more autonomy over their working lives and enabled them to spend more time with their friends and families. For many others though, smart phones have become tyrants in their pockets, never allowing them to switch off, relax and recharge their batteries. The negative impacts of this “always on”culture are that your mind is never resting, you’re not giving your body time to recover, so you’re always stressed.