![]() uses your sleep cycles and counts them backwards, starting from your wake-up time. If only my 9-year-old self would have known about sleep cycles I would have delayed the ever so awful bedtime! Now I can’t seem to get enough sleep. So, with this…you’re more than welcome to stay up till 4:30 even though nothing good ever happens after midnight. You don’t have to recall that bizarre dream of you jumping off a building and turning into a butterfly. took the sleep cycle and created a site to do the calculations for you. Each step progresses from light sleep to REM and then – repeat. The REM step is the final step of the cycle and if woken up during this, you awake during your dreams. You may have heard of the REM cycle (Rapid Eye Movement). After all, you’d think 10 hours of sleep would do the trick… but you’re wrong!ĭuring a night of sleep you usually pass through five stages of sleep split into 5 different parts. You may think going to bed at 11 PM and getting up at 9 AM would leave you refreshed. is a simple online calculator, which will tell you when you should go to bed based on what time you need to get up. You may have been told before that 8 hours of sleep is prescribed, and that if you get 7 hours and 59 minutes you’re tired because you went to bed too late. Every morning turns into a battle against my alarm and my bed turns into a vortex. Long-term exposure to light at night in shift work has even been associated with an increased risk of breast and prostate cancers.Many say that there are 2 types of people: Ones that describe themselves as morning people…also known as “ Martians”, and those who press snooze endlessly in the morning… humans. Most other sleep calculators are based on old information and can therefore give results that are no longer considered correct. It is likely that disruption of the clock contributes not only to sleep problems, but the development of depression, metabolic disorders and cardiovascular disease. Our sleep calculator is based on the newest information on how people should sleep and is constantly updated to make sure that it lives up to our current scientific knowledge about sleep. "As our clocks are very sensitive to blue light, the use of tablets and smartphones at night can be disruptive. "Problems arise when we disrupt our clock with light at night, essentially tricking our clock into thinking it is day when it is night," Cain explains. This means that when we have computer screens and televisions and bright lights on into the evening (something 54 per cent of Australians do, according to a new survey by Koala mattresses), we confuse our SCN. When there is less light – like at night – the SCN tells the brain to make more melatonin so you get drowsy." "Since it is located just above the optic nerves, which relay information from the eyes to the brain, the SCN receives information about incoming light. "The body's master clock, or SCN, controls the production of melatonin, a hormone that makes you sleepy," explains the National Institute of General Medical Sciences. There are a couple of simple ways to rest easier. This is most obvious in situations where the clock is disrupted, like in jet lag and shift work," Cain explains. When you are sleeping at a non-optimal time, sleep suffers. If you sleep at the right biological time, you'll get optimal sleep. "Sleep quality depends very much on the timing of sleep relative to your internal clock. For starters, it's not just about REM sleep, it's about when we sleep. ![]() Trying to calculate a bedtime based on sleep cycles is problematic for several reasons. Luckily, I don't think many people would actually follow the advice." It's potentially harmful, if the advice in that article gets around. Use this calculator to compute what time to wake up or go to bed to get a given number of hours of sleep. "Sleeping an extra hour, but feeling a bit groggier when waking would most likely be better for your alertness across the waking day. ![]() ![]() This is likely to be a temporary benefit. In REM, the brain is about as active as it is when awake, so it may feel easier to wake. "I'd definitely disagree that it is more important to wake out of REM than to get more sleep. "It is easier to wake out of REM, but the advice on when to go to bed is terrible," says Cain, a senior lecturer whose research focus is sleep and circadian rhythms. ![]()
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