An interesting-yet-totally-inconclusive study suggests that napping during the daytime could increase your risk of premature death by a third. Adults who nap every day are two-and-a-half times more likely to die from respiratory illnesses than those who only sleep at night, because napping can cause inflammation in the body, according to researchers. After analysing the data, scientists discovered that people who slept for less than an hour in the day increased the chance of death by around 14 per cent. This number rose to 32 per cent if the nap lasted for more than an hour, and was linked to the development of respiratory illnesses, according to the study. While napping may cause respiratory illness, the study also serves up the idea that a person who naps in the first place may already suffer from a lung disease.