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Older people today are smarter, stronger and faster than 30 years ago

cognitive performance digit span test digit symbol test verbal fluency test reaction time functional capacity walking speed extension of knee grip strength physical function

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#1 Engadin

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Posted 22 September 2020 - 08:06 PM


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S O U R C E :   New Atlas

 

O P E N   A C C E S S    P R I M A L   S O U R C E   1 :   Aging Clinic and Experimental Research_Cognitive performance (Birth cohort differences in cognitive performance in 75- and 80-year-olds: a comparison of two cohorts over 28 years)

 

P A Y W A L L E D   P R I M A L   S O U R C E   2 :   Journals of Gerontology_Physical Performance (Cohort differences in maximal physical performance: a comparison of 75- and 80-year-old men and women born 28 years apart)

 

 

 

 

 

 

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New research offers a valuable insight into the progress made extending healthspan over the past centuryvision.si/Depositphotos

 

 

 

A compelling new study from researchers in Finland has compared the physical and cognitive performance of a group of older people in 2017 with a similarly aged group three decades earlier. Improvements were seen in almost every test, suggesting progress has been made extending healthspan, the number of healthy years a person lives.

 
Over the last century humans have, on average, been living longer and longer. Life expectancy has been consistently increasing, however, over the past few decades some researchers have begun to suggest medical research should focus more on quality of life, instead of quantity.
 
In 2001 the World Health Organization incorporated a new metric into its global analyses. HALE, healthy life expectancy, is a novel calculation of how many years a person can expect to live in optimal health. This renewed focus on healthspan, not just lifespan, suggests as human beings consistently begin to live well past the age of 70, attention must be paid to the quality of these senior years.
 
In a relatively unique pair of new studies, researchers from the University of Jyväskylä in Finland have compared physical and cognitive performance in two cohorts of similarly aged subjects born around 30 years apart.
 
The first cohort of around 500 subjects, aged between 75 and 80 (born between 1910 and 1914), participated in a variety of physical and cognitive tests in 1989. The second cohort, again aged between 75 and 80 (born between 1938 and 1943), completed the same barrage of tests in 2017.
 
Taina Rantanen, principle investigator on the project, says this research allowed for a novel way to measure the progress made in extending healthspan from one generation to the next.
 
“This research is unique because there are only a few studies in the world that have compared performance-based maximum measures between people of the same age in different historical times,” says Rantanen. “Performance-based measurements describe how older people manage in their daily life, and at the same time, the measurements reflect one’s functional age.”
 
Improvements were noted across almost all tested metrics in the later-born cohort. Looking at physical performance, walking speed was faster, grip strength improved between five and 25 percent, knee extension strength improved between 20 and 47 percent, and lung function measurements were better. Similar improvements were also seen in the later-born cohort across most cognitive performance tests.
 
Matti Manukka, a postdoctoral researcher working on the project, suggests a broad variety of factors can explain why the later-born cohort displayed such consistent healthspan improvements.
 
“The cohort of 75- and 80-year-olds born later has grown up and lived in a different world than did their counterparts born three decades ago,” says Manukka. “There have been many favorable changes. These include better nutrition and hygiene, improvements in health care and the school system, better accessibility to education and improved working life.”
 
The researchers do note the findings may, to a degree, be unique to Finland, a country that was still largely agrarian and undeveloped when the earlier cohort were born around 1910. A number of social reforms, including longer obligatory education and better nutritional recommendations, occurring in the 1940s and 50s are cited as key to many of the physical and cognitive improvements seen in the later-born cohort.

 







Also tagged with one or more of these keywords: cognitive performance, digit span test, digit symbol test, verbal fluency test, reaction time, functional capacity, walking speed, extension of knee, grip strength, physical function

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