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Washington [US], May 1 : It is widely acknowledged that as we age, we lose muscle power and slow down, making ordinary movements like getting up, walking, and sitting more difficult.However, new Edith Cowan University (ECU) research suggests that this could also be a sign of another sinister health concern associated with ageing: late-life dementia.The researchers from ECU's Nutrition & Health Innovation Research Institute and Centre for Precision Health examined more than 1000 women with an average age of 75 to investigate the relationship between muscle function and dementia.The team tested the women's grip strength and the time it took them to rise from a chair, walk three metres, turn around, and sit back down using a timed-up-and-go (TUG) test in partnership with the University of Western Australia.These tests were repeated after five years to monitor any loss of performance.Over the next 15 years, almost 17 per cent of women involved in the study were found to have had a dementia event, categorised as a dementia-related hospitalisation or death.The team found lower grip strength and slower TUG were significant risk factors for presenting with dementia, independent of genetic risk and lifestyle factors such as smoking, alcohol intake and physical activity levels.Relationship establishedThe women with the weakest grip strength were found to be more than twice as likely to have a late-life dementia event than the strongest individuals.A similar relationship emerged between TUG performance and dementia, with the slowest in their TUG test more than twice as likely to experience dementia than the quickest.When researchers looked at the changes in grip strength and TUG test results after five years, a decrease in performance was also linked with greater dementia risk.Those who had experienced the biggest decline in grip strength and TUG speed were approximately 2 and 2.5 times more likely, respectively, to have had a dementia event, compared to those in the group who recorded the smallest decline in performance.Women with the biggest drop in TUG performance were found to be over four times more likely to have a dementia-related death than the fastest.An early warningSenior researcher Dr Marc Sim said grip strength, which can be easily measured using a handheld device known as a dynamometer, may be a measure of brain health due to the overlapping nature of cognitive and motor decline."Possibly due to a range of underlying similarities, grip strength may also present as a surrogate measure of cardiovascular disease, inflammation and frailty, which are known risk factors for dementia," Dr Sim said.Dr Sim said the findings from the study could help health professionals to identify dementia risk in patients earlier. "Both grip strength and TUG tests aren't commonly performed in clinical practice, but both are inexpensive and simple screening tools," he said.Incorporating muscle function tests as part of dementia screening could be useful to identify high-risk individuals, who might benefit from primary prevention programs aimed at preventing the onset of the condition such as a healthy diet and a physically active lifestyle.The exciting findings were that decline in these measures was associated with substantially higher risk, suggesting that if we can halt this decline, we may be able to prevent late-life dementias. However, further research is needed in this area.Centre for Precision Health Director Professor Simon Laws said there has been encouraging progress in identifying early warning signs of dementia."We are now starting to see a number of simple yet indicative screening assessments that could be combined with other biological and clinical measures to provide a holistic risk profile for individuals presenting to their GP with, for example, memory concerns," he said.Impaired muscle function, including its decline, is related to greater long-term late-life dementia risk in older women' was published in the Journal of Cachexia, Sarcopenia and Muscle.Disclaimer: This post has been auto-published from an agency feed without any modifications to the text and has not been reviewed by an editor

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Ecu's Nutrition & Health Innovation Research Institute And Centre For Precision HealthFOLLOW

Ecu's nutrition & health innovation research institute and centre for precision health, Latest News

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