Recent research published in journals Gero science It has been suggested that a person’s overall physical and mental reserve can predict the risk of developing memory and thinking problems later in life. Scientists have found that older adults with lower baseline physical and psychological abilities are more likely to develop mild cognitive impairment within a few years. These findings suggest that taking a broader approach to health as we age provides evidence of a better strategy to protect the brain.
The World Health Organization defines inherent capacity as the overall combination of physical and mental abilities that an individual can rely on. This mindset focuses on a person’s existing strengths rather than their illnesses or deficiencies. This concept promotes a holistic view of aging that includes movement, mental health, sensation, vitality, and thinking skills.
Traditionally, medical science has often viewed aging simply as the presence or absence of certain diseases. The concept of essential capabilities shifts the perspective to a broader understanding of overall functioning. Measuring these overall strengths provides a complete picture of an individual’s resilience.
Evidence to date indicates that higher inherent ability tends to reduce the risk of hospital visits. It also helps seniors maintain their daily independence for a long time. But scientists had never previously tested whether this global measure of health could predict the onset of memory and thinking problems.
Researchers conducted this study to see if a person’s natural abilities may indicate a risk for future cognitive decline. They wanted to understand whether everyday physical and mental abilities could serve as early warning signs. Identifying these early patterns could lead to better public health strategies for aging societies.
“Given my interest in brain health and aging, I thought it might be important to address the relationship between cognition and this relatively new concept of inherent ability. I designed this study primarily as a research project for honors medical students, but given the interesting results, I decided to expand the analysis for publication,” explained study author Ingrid Buller Peralta, honorary research fellow at the Center for Clinical Neuroscience at the University of Edinburgh.
Scientists analyzed data from the British Longitudinal Study on Aging. This is a large-scale, ongoing project to track the health and wellbeing of older people living in the UK. The researchers focused on a precise sample of 731 older adults aged 60 to 89 years.
At the start of the analysis, these individuals had not been diagnosed with dementia or Alzheimer’s disease. At initial evaluation, all had normal memory and thinking ability. Scientists used data collected between 2012 and 2013 to measure participants’ natural abilities.
Researchers looked at 12 specific indicators across five broad categories of health. These categories include thinking skills, movement, mental health, sensory abilities, and general physical vitality. To measure basic thinking skills, we tested participants’ memory recall and recognition of the current date and time.
To measure movement, the researchers recorded walking speed, standing balance, and the time it took to repeatedly rise from a chair. Mental health status was measured by asking participants about sleep quality, symptoms of depression, and overall life satisfaction. Sensory abilities included self-report questionnaires on visual and auditory quality.
Vitality was assessed by spirometry and grip strength tests using specialized medical equipment. Scientists combined all these individual measurements to create a single overall score for each person. To do this, they used a mathematical technique called item response theory. This method calculates fundamental characteristics based on performance across various tests.
Four to five years later, the researchers reassessed the participants’ thinking and memory skills. They used a standard screening tool called the Mini-Mental State Examination. This test asks 30 questions to check basic mental functions such as memory, attention, and language.
Based on these test scores, older adults were classified into categories of normal cognition, mild disability, or moderate to severe disability. The researchers found that lower initial ability scores were associated with a significantly higher risk of later developing mild cognitive impairment. Participants who maintained normal cognitive abilities over many years had significantly higher initial scores than those who developed cognitive problems.
Older age and lower education levels are more likely to cause problems with memory and thinking skills. Scientists adjusted the data to account for lifestyle factors such as physical activity and number of pre-existing health conditions. In this adjusted model, a person’s gender, exercise habits, and chronic disease did not independently predict later cognitive decline.
The lack of an independent association between pre-existing illness and subsequent memory problems suggests that innate ability captures a more accurate picture of aging. Scientists noted that people with a history of smoking were at increased risk of mild cognitive impairment. This provides evidence that smoking can negatively impact brain health, regardless of a person’s overall physical and mental baseline.
“Essential capacity is a new concept proposed by the World Health Organization that goes beyond purely physical, mental, or cognitive health and integrates several areas to reflect general well-being in a more holistic way,” Burr Peralta told PsyPost. “I think this is a quantitative summary that reflects how well I am emotionally, physically and mentally, but more importantly, I think it’s the sum of all my ‘abilities’, which are being saved, like a pension fund, to age well.” ”
“While decline in innate ability is associated with declines in several age-related physical functions, our study shows for the first time that it is associated with subsequent decline in cognitive function. Similarly, high IC in cognitively healthy older adults helps maintain normal cognitive function four to five years later.”
“Overall, these results suggest that maintaining a healthy brain as we age is not just about focusing on specific aspects of health, such as participating in physical and social activities or practicing good sleep hygiene,” she explained.
The researchers pointed out several potential misconceptions and limitations of the study. They emphasized that statistical associations do not prove a direct causal relationship between natural ability and cognitive decline. This finding only highlights a strong predictive relationship that requires further investigation.
The study also focused on a specific group of older adults in the UK, meaning these patterns may look different in other cultures. Future studies are needed to determine whether these findings are replicated in populations facing different environmental stressors. Factors such as extreme poverty and high levels of air pollution can influence the relationship between physical performance and brain health.
Another limitation includes the use of self-report surveys to measure things like sleep and sensory abilities. People sometimes remember their habits incorrectly or estimate them inaccurately. The researchers suggest that future studies should use objective tools such as wearable sleep trackers to collect more accurate data.
Despite these limitations, the inherent ability appears to be a highly personalized method for monitoring the aging process. Expanding this research could eventually allow physicians to use the overall competency score as a standard screening tool in their clinics. By capturing early declines across multiple physical systems, medical professionals may be able to intervene before memory problems become severe.
The study, “Decreased natural performance is associated with risk of developing mild cognitive impairment in the UK Longitudinal Study of Aging (ELSA)” was authored by Rosa Birchenault, Ingrid Buller Peralta, Alejandra Maroig and Graciela Muñiz Terrera.
