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	Do we sleep better in blocks of four hours?
	We asked Professor Russell Foster: No. It depends on the individual but most of the time it’s an eight hour block. Sometimes you can separate it in the middle with a slight waking up phase and then you go back to sleep again. On the whole, no.
	July 2008
Comment on this... Jennifer P asked the Naked Scientists: I'm writing from cold snowy Montreal I was wondering if it's true that we have to sleep in blocks of 4 hours in order to get a good night sleep. in other words 9 hours you would wake up sleepy but 8 hours would be just right. Looking forward to the next Podcast Thanks a bunch Keep up the great work What do you think? - Jennifer P - 15th Jun 08 So what about 12 hours??? 16??? etc. - Karen W. - 15th Jun 08 http://www.mayoclinic.com/popupnowrap.cfm?objectid=6E3BD2E9-C204-4CFF-AA3E6D509981EAD3&method=display_full - RD - 16th Jun 08 Thanks RD! - Karen W. - 16th Jun 08 The 75 year old male's sleep pattern may be due nocturia, due to enlarged prostate. http://en.wikipedia.org/wiki/Benign_prostatic_hyperplasia ] - RD - 16th Jun 08 NO But I had a hard time understanding the chart! dowhat is second stage referring to... is that the deeper sleep? - Karen W. - 16th Jun 08 Stage 2 is deeper than Stage 1 ... http://en.wikipedia.org/wiki/Sleep#Stages_of_sleep - RD - 16th Jun 08 OK thats what I thought. Stage two would be nice in longer shots for me.. and rem would be nice on a more regular basis! - Karen W. - 16th Jun 08 See the whole discussion \| Make a comment

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Listen to this as part of the show: 6th Jul 2008 - Body Clocks and Circadian Rhythms
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