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Coffee Has Minimal Effects On Sleep A US Study Says

Coffee Has Minimal Effects On Sleep

Various news websites have published interesting information recently on a university study in the USA concerning the effects of caffeine on a person’s sleep. The study was conducted by Dr Christine Spadola and insights can be seen from this extract from Frank News website:

Drinking coffee or tea within four hours of bedtime does not affect sleep, a study has found.

Researchers from Florida Atlantic University and Harvard Medical School recorded caffeine, alcohol and nicotine consumption among 785 volunteers and compared daily sleep diaries and data from wrist sensors.

Around 40 per cent of the group consumed caffeine on at least one night of the study, which was carried out for an average of 6.7 nights. The study found that while nicotine and alcohol disrupted sleep, caffeine seemed to have no effect.

Writing in the journal Sleep, Dr Christine Spadola, of Florida Atlantic University, said: "Considering the public health importance of obtaining quality sleep and the widespread use of … caffeine, relatively few studies have thoroughly investigated the association between evening substance use and sleep parameters.

"This study represents one of the largest longitudinal examinations of the associations of evening use of alcohol, caffeine and nicotine with objectively measured sleep outcomes.

"We did not observe an association between ingestion of caffeine within four hours of bed with any of the sleep parameters." "This was a surprise to us but is not unprecedented. The previous evidence is mixed when it comes to the effect of caffeine on sleep," Spadola said.

Other information can be found on these links below:

http://cdsi.fau.edu/ssw/people/spadola/ 

https://www.telegraph.co.uk/science/2019/08/06/coffee-bed-may-not-bad/

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