Can You Keep Balance On One Leg? It Refelects Your Brain Health

Balancing on one leg may indicate if a person is at risk of dementia or stroke, a study has found. ...

Balancing on one leg may indicate if a person is at risk of dementia or stroke, a study has found.

Those who struggle to balance on one leg for 20 seconds or longer, are at increased risk for small blood vessel damage in the brain and reduced cognitive function in otherwise healthy people with no clinical symptoms, according to new research in the American Heart Association's journal Stroke.

A few years ago, researchers found that habitually sleeping less than six hours a night significantly increases the risk of stroke, now the shift in studies has leaned towards posture and balance.

"Our study found that the ability to balance on one leg is an important test for brain health," said Yasuharu Tabara, Ph.D., lead study author and associate professor at the Center for Genomic Medicine at Kyoto University Graduate School of Medicine in Kyoto, Japan.

"Individuals showing poor balance on one leg should receive increased attention, as this may indicate an increased risk for brain disease and cognitive decline."
The study consisted of 841 women and 546 men, average age of 67. To measure one-leg standing time, participants stood with their eyes open and raised one leg. The maximum time for keeping the leg raised was 60 seconds.

Participants performed this examination twice and the better of the two times was used in the study analysis. Cerebral small vessel disease was evaluated using brain magnetic resonance imaging.

Researchers found that the inability to balance on one leg for longer than 20 seconds was associated with cerebral small vessel disease, namely small infarctions without symptoms such as lacunar infarction and microbleeds.

They noted that:

  •     34.5 percent of those with more than two lacunar infarction lesions had trouble balancing.
  •     16 percent of those with one lacunar infarction lesion had trouble balancing.
  •     30 percent of those with more than two microbleed lesions had trouble balancing.
  •     15.3 percent one microbleed lesion had trouble balancing.

Earlier in the year researchers at the Medical Research Council found that standing on one leg may predict which 53-year-olds at risk of early death.

Men aged 53 years old who could balance on one leg for more than ten seconds and stand up and sit down in a chair more than 37 times in a minute were found to be least at risk of dying early by the researchers.

Women of the same age who could stand up and sit down more than 35 times in a minute and stand on one leg for more than ten seconds were also at the lowest risk compared to those who performed less well.

Overall, those with cerebral diseases were older, had high blood pressure and had thicker carotid arteries than those who did not have cerebral small vessel disease.

However, after adjustment for these covariates, people with more microbleeds and lacunar infarctions in the brain had shorter one-legged standing times. Short one-legged standing times were also independently linked with lower cognitive scores.

Although previous studies have examined the connection between gait and physical abilities and the risk of stroke, this is among the first study to closely examine how long a person can stand on one leg as an indication of their overall brain health.
"One-leg standing time is a simple measure of postural instability and might be a consequence of the presence of brain abnormalities," said Tabara.
Small vessel disease occurs due to microangiopathy of arterioles in the brain, making these arteries less flexible, which can interfere with blood flow. Small vessel disease typically increases with age.

Loss of motor coordination, including balance, as well as cognitive impairment has been suggested to represent subclinical brain damage.

Tabara and colleagues also found a strong link between struggling to stand on one leg and increased age, with marked shorter one-leg standing time in patients age 60 and over.

Although the study did not assess participants' histories of falling or physical fitness issues, such as how fast they could walk or any gait abnormalities, Tabara said the one-leg standing test is an easy way to determine if there are early signs of being at risk for a stroke and cognitive impairment and whether these patients need additional evaluation.

By April McCarthy, Prevent Disease;  | Reference: ahajournals;

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