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The international study included more than 2,600 participants, ages 45-75. They all had heart disease and obstructive sleep apnea, a common condition in which the upper airway repeatedly collapses during sleep. People with sleep apnea often feel drowsy and sluggish during waking hours.
"We were pleased to find that our CPAP users reported that they were better able to maintain their levels of activity over the four years of the study, and that they reported fewer limitations in moderate and vigorous activities including those that are important for independent aging, like walking up the stairs," said study co-author Kelly Loffler. She's a research fellow at the Adelaide Institute for Sleep Health at Flinders University in Adelaide, Australia.
The participants self-reported their physical activity levels at the start of the study and over six months, two years and four years.
Over an average follow-up of 3.7 years, the CPAP group reported about 20% higher levels of moderate physical activity than the control group. Patients in the CPAP group was also more likely to report activity levels recommended by experts.
The increased level of physical activity among CPAP users in the study would likely provide them with significant health benefits over longer periods of time, such as lowering the recurrence of heart events, the researchers noted.
The study is in the February issue of the Journal of Clinical Sleep Medicine.
CPAP, when combined with lifestyle interventions such as diet and targeted exercise, will likely provide many users with a "benefit that goes beyond their reported sleep," Loffler said in a journal news release.
The U.S. National Heart, Lung, and Blood Institute has more on sleep apnea.
SOURCE: Journal of Clinical Sleep Medicine, news release, Feb. 16, 2021
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