About a third of Canadian adults say they get less than the recommended eight hours of sleep per night. And for teens, it's just as bad – more than half get much less than the eight to 10 hours per night of recommended shut eye. So why is sleep so important? Studies show that sleep is necessary to recharge, improve memory and performance. A lack of sleep has been linked to health problems like obesity, diabetes, depression and, in later years, cardiovascular disease. So, why are we becoming a sleep deprived nation?