Researchers at University College London have found that regular physical activity can protect against cognitive decline as we age, but this protective effect may be weakened in people with sleep deprivation. Research published in the journal Lancet Healthy Longevity.
The researchers analyzed data from nearly 9,000 people aged 50 and older to assess how different combinations of sleep and physical activity habits might affect people’s cognitive function over time.
They found that people who were more physically active but slept less than six hours a night experienced faster cognitive decline. This means that after 10 years their cognitive functions are at the level of their less active peers.
As with previous studies, the new study found that six to eight hours of sleep each night and higher levels of physical activity were associated with better cognitive performance.
Participants’ cognitive abilities were assessed using an episodic memory test (participants were asked to recall a 10-word list immediately or after a pause) and a fluency test (participants were asked to name as many animals as possible in one minute).
The scientists noted that WHO already recognizes regular physical activity (moving and exercising during the day) as a way to protect against cognitive decline. A new study shows the importance of getting enough sleep along with mobility.
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