Friday, 19 October, 2018

Sleep deprivation impacts performance even if you don't feel it

Sleep deprivation impacts performance even if you don't feel it Sleep deprivation impacts performance even if you don't feel it
Isabel Fisher | 29 May, 2018, 15:23

Researchers say getting more zzzzz's on Saturday and Sunday morning may extend your life.

"The duration of sleep is important for longevity", said Thorbjorn Akersted of the Stress Research Institute in Sweden, quoted by The Guardian. A cohort of 43,880 subjects was followed for 13 years through record?linkages.

The effect only applied to those under 65 as the mortality difference disappeared for people who were older. "I suspected there might be some modification if you included also weekend sleep, or day-off sleep". A survey of their sleep habits over that time found that people under 65 who slept less than five hours every night had a mortality rate 65 percent higher than people sleeping at least six hours a night. In the same age group, short sleep (or long sleep) on both weekdays and weekend showed increased mortality.

Sleep deprivation impacts performance even if you don't feel it

So if you're someone who gets very little sleep during the week, you just need to sleep in during the weekends to make up for it. That was compared to those who slept seven hours a night. The performance of sleep-deprived individuals was no different among those who reported feeling alert and those who said they felt exhausted. The adults in the study were grouped by sleep duration. Past studies really only looked at sleep patterns during the week, and recommended that people change their sleeping habits gradually over time.

When, instead, different combinations of weekday and weekend sleep durations were analysed, we observed a detrimental association with consistently sleeping ≤5 hr (hazard ratios 1.65; 95% confidence intervals 1.22-2.23) or ≥8 hr (hazard ratios 1.25; 95% confidence intervals 1.05-1.50), compared with consistently sleeping 6-7 hr per day (reference).

And could even help you live longer.


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