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MONDAY, Sept. 1 (HealthDay News) -- Older patients who sleep during the day while in rehabilitation have less functional recovery, new research shows.
For the study, which was expected to be published in the Sept. 1 issue of Sleep, scientists tracked the sleeping patterns and other predictors of recovery (e.g., mental status, hours of therapy received, reason for admission) in 245 older adults (average age 80.6 years) who had been admitted for rehabilitation following an incident such as an orthopedic problem, a heart problem, or a stroke.
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Sleep measurements were taken in the days after admission to the rehabilitation facility, and again three months later.
The researchers found that the participants slept for an average of 2.1 hours during the daytime, which represents 15.8 percent of the time between waking up and bedtime. Those who had higher percentages of daytime sleep showed significantly less functional recovery, even after the researchers adjusted for other predictors of recovery. And more daytime sleeping remained a predictor of less recovery at the three-month follow-up.
"We were surprised that the results suggested that it was the excessive daytime sleeping in the rehabilitation facility which was associated with less improvement in their physical functioning," said principal investigator Cathy A. Alessi, of the VA Greater Los Angeles Healthcare System and the UCLA David Geffen School of Medicine, said in a university news release. "We were also surprised by how long this effect lasted. For up to three months later, more sleeping during the daytime while they were in the rehabilitation facility was still related to their physical functioning after being discharged."
The researchers speculated that people's sleep may be disrupted while they are in the hospital due to existing medical conditions, sleep disorders, or environmental factors. Furthermore, it may be that daytime sleeping triggers decreased motivation and effort expended during therapy sessions, which could hinder recovery during rehabilitation.
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