Dr. Guy Leschziner

Well, I think on a population basis, we know that sleeping very little or sleeping a lot is associated with a range of negative health consequences, including mortality, the most negative health consequence. So people who sleep a very short period, usually less than about six hours, certainly have an increased risk of mortality compared to those who sleep seven or eight hours.

Well, I think on a population basis, we know that sleeping very little or sleeping a lot is associated with a range of negative health consequences, including mortality, the most negative health consequence. So people who sleep a very short period, usually less than about six hours, certainly have an increased risk of mortality compared to those who sleep seven or eight hours.

But it's important to understand that that is on a population basis and that for each individual, what is seen as a normal sleep requirement is perhaps slightly different. And that's a function of the quality of your sleep.

But it's important to understand that that is on a population basis and that for each individual, what is seen as a normal sleep requirement is perhaps slightly different. And that's a function of the quality of your sleep.

But it's important to understand that that is on a population basis and that for each individual, what is seen as a normal sleep requirement is perhaps slightly different. And that's a function of the quality of your sleep.

So whether or not you've got anything else going on with your sleep, like, for example, sleep apnea, this breathing condition that disrupts the quality of your sleep because your airway is constantly collapsing. But it's also a function of your genes in that we know that there are a number of genes that influence our sleep requirements.

So whether or not you've got anything else going on with your sleep, like, for example, sleep apnea, this breathing condition that disrupts the quality of your sleep because your airway is constantly collapsing. But it's also a function of your genes in that we know that there are a number of genes that influence our sleep requirements.

So whether or not you've got anything else going on with your sleep, like, for example, sleep apnea, this breathing condition that disrupts the quality of your sleep because your airway is constantly collapsing. But it's also a function of your genes in that we know that there are a number of genes that influence our sleep requirements.

So, for example, I have a few families that I've seen in whom everybody in that family sleeps a very short duration and doesn't seem to have any negative effects of sleeping, say, four or five hours a night.

So, for example, I have a few families that I've seen in whom everybody in that family sleeps a very short duration and doesn't seem to have any negative effects of sleeping, say, four or five hours a night.

So, for example, I have a few families that I've seen in whom everybody in that family sleeps a very short duration and doesn't seem to have any negative effects of sleeping, say, four or five hours a night.

But it's also important to understand that some people are resistant to the effects of sleep deprivation in terms of how sleepy they feel, but not necessarily resistant to the effects of sleep deprivation in terms of, for example, their cognitive function, how easy they find to perform particular tasks or how good their memory is, for example.

But it's also important to understand that some people are resistant to the effects of sleep deprivation in terms of how sleepy they feel, but not necessarily resistant to the effects of sleep deprivation in terms of, for example, their cognitive function, how easy they find to perform particular tasks or how good their memory is, for example.

But it's also important to understand that some people are resistant to the effects of sleep deprivation in terms of how sleepy they feel, but not necessarily resistant to the effects of sleep deprivation in terms of, for example, their cognitive function, how easy they find to perform particular tasks or how good their memory is, for example.

So just because you don't necessarily feel sleepy when you're sleep deprived doesn't mean that you don't have any consequences of that sleep disruption per se.

So just because you don't necessarily feel sleepy when you're sleep deprived doesn't mean that you don't have any consequences of that sleep disruption per se.

So just because you don't necessarily feel sleepy when you're sleep deprived doesn't mean that you don't have any consequences of that sleep disruption per se.

Well, the evidence suggests that if you sustain a significant sleep debt, which is how we term it, that if you're losing quite a lot of sleep during the week, then actually it's quite difficult to make that up by lying in at the weekend and that some of those cognitive effects of being sleep deprived during the week persist on a Monday morning.

Well, the evidence suggests that if you sustain a significant sleep debt, which is how we term it, that if you're losing quite a lot of sleep during the week, then actually it's quite difficult to make that up by lying in at the weekend and that some of those cognitive effects of being sleep deprived during the week persist on a Monday morning.

Well, the evidence suggests that if you sustain a significant sleep debt, which is how we term it, that if you're losing quite a lot of sleep during the week, then actually it's quite difficult to make that up by lying in at the weekend and that some of those cognitive effects of being sleep deprived during the week persist on a Monday morning.