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In reply to the discussion: Should America Stop Changing Its Clocks? [View all]etherealtruth
(22,165 posts)Body's Clock Never Adjusts to Daylight Saving Time
http://abcnews.go.com/Health/Healthday/story?id=4509150
WEDNESDAY, Oct. 24 (HealthDay News) -- Changing to daylight saving time may give people an hour more of sunlight, but it appears that their internal body clocks never really adjusts to the change, German researchers report.
In fact, daylight saving time can cause a significant seasonal disruption that might have other effects on our bodies, according to the report in the Oct. 24 online edition of Current Biology.
For both morning larks and night owls, their timing for sleep and peak activity easily adjusted when daylight saving time ended in the fall. However, it never adjusted to the return to daylight saving time in spring. This was especially true for night owls -- those who stay up late and sleep late.
"If we didn't change to daylight saving time, people would adjust to dawn during the summer and again to dawn in the autumn," Roenneberg. "But this natural adjustment is interrupted by daylight saving time," he said.