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Older Adults Can Improve Movement by Acting Like Babies

Researchers assumed that older adults would not be able to maintain movement over time due to fatigue. They were surprised

 

Babies and toddlers motor mechanism can also help older adults improve movement accuracy, according to new research from Ben-Gurion University of the Negev (BGU).

The researcher shows that an infant’s exploitation the home process can work in older adults, as well.

“In early development, babies seem to make random movements in all directions until they learn to purposefully reach for objects,” says Dr. Shelly Levy-Tzedek. “Their movements are variable until they find a solution for the problem at hand, like reaching for that Cheerios bit. When they find a good movement plan, they exploit it.”

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In the study, published in Nature Scientific Reports, the arms of older adults (ages 70+) were connected to a sensor that measures the rotation of the arm at the elbow. Participants were then asked to make rhythmic movements of the forearm in a “windshield wiper” motion while trying to maintain certain speeds and arm amplitude, with and without visual feedback.

At first “their movements were too slow and too small,” says Dr. Levy-Tzedek, “We then encouraged them to make movements that were larger and faster, and their performance on the original task improved significantly.”

 

 

The researchers assumed that older people would not be able to maintain an increase in speed and amplitude of movement over time due to fatigue. The team members were surprised to discover that making mistakes helped improve future task performance.

They also found that once a better movement pattern was established, the variability dropped. Making exaggerated movements actually helped them fine-tune their control.

“We haven’t tested it directly in physical therapy, but perhaps getting older adults to make exaggerated movements can help fine-tune their performance on specific tasks that they find difficult to accomplish otherwise,” says Dr. Levy-Tzedek.

 

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