People should not use their laptops and mobile phones in the evening if they want to avoid sleep disruption and a range of mood disorders, including depression, claims new research from the University of Glasgow. The largest study so far into the link between disrupted body clocks and mood disorders and wellbeing has been published in the journal Lancet Psychiatry. The research into the behaviour of 91,000 people shows that disrupted body clock rhythms are associated with increased susceptibility to depression, bipolar disorder, and adverse wellbeing. According to the study, disturbances to the body’s internal clock, characterised by increased activity during rest periods and/or inactivity during the day, are also associated with mood instability, more subjective loneliness, lower happiness and health satisfaction, and worse cognitive function.

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A large number of people walk around with their smartphones in their hands even when they are not using them, according to a new study. In the study, The Phone Walkers: A study of human dependence on inactive mobile devices, researchers  Laura Schaposnik and James Unwin at the University of Illinois at Chicago studied over 3,000 adult pedestrians at six city center locations in Paris. Just over half the pedestrians were female, with an average age of about 35. Of the total adults observed, 674 were phone walkers – just over a fifth of people. The researchers noted that there were significant differences between the sexes. In total, around 20 percent of men were phone walkers, compared with 33 percent women. However, phone walking was less common in mixed couples: just 18 percent.

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