I have a history of bad posture. I usually spend more than eight hours a day working on a laptop – sometimes at my home desk with an adjustable office chair and external monitors, but also on the sofa, at the dining table or even in bed. By the end of a typical workday, my shoulders, neck and back are painfully stiff, despite weekly trips to the gym and swimming pool to try to loosen them up. I recently visited a massage therapist, who gasped at how tight my shoulders were and told me, with a look of alarm, that I must improve my posture. An instant fix in the form of a wearable item is very appealing.