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According to studies a lark is a morning person. You know, the type that's annoying alert, awake and wants everyone else to be as spritely.

And then there's the Owl, who comes alive at night. Given the choice they'd shun the nine-to-five life for working into the early hours.

Studies have even shown that can also explain the unconventional hours that larks and owls keep.

Michael Mosley helps a doctor who's sleep patterns have disrupted by her night shift working.

Clare finds out the secret to a goodnight's sleep is down to her being an owl or a lark. though at The One Show we reckon your bedroomÌýmight also have something to do with it.ÌýWe're looking for the nation's most bizarre rooms...send us yourÌýphotosÌýand tell us how your room helps you get a goodnight's sleep. Ìý

Did you know we all have aÌýDaily RhythmÌýwhich tells us when to wake up and when to feel sleepy? Take the Daily RhythmÌýtest and let us know the results.ÌýÌýÌý