It makes little difference if you're snuggling down into the most luxurious double bed you can imagine, your age still plays an important factor in your opinion of your night's sleep. According to new research, attitudes to sleep vary considerably throughout a lifetime. A study carried out by the Center for Sleep and Circadian Neurobiology at the University of Pennsylvania, published in the Sleep journal March 1st 2012, found that out of 150,000 adults, those in their forties had the most complaints about their quality of sleep. This is compared to people in their eighties, who have markedly fewer complaints. Study author, Dr Michael Grandner, acknowledged that the results weren't necessarily reflective of the actual quality of sleep experienced, as the study only noted participants' own opinions. However, the research sheds important light on attitudes to sleep changing throughout the course of lives - and gives those of us who might be worrying about old age something to look forward to!