Do you struggle to lift five kilograms? Your health could be at risk, study finds
Scientists at the University of Sharjah in the United Arab Emirates have devised a simple test that they can say can predict an increased risk of developing a host of health problems in older adults. All you have to do is try to pick up a five-kilogram weight.
Struggle with that, they say, and you have a significantly higher risk of experiencing a lower quality of life, higher rates of depression, chronic lung diseases, hip fractures, joint disorders, high cholesterol, Alzheimer's disease, stroke, osteoarthritis and more.
The study was published in the journal Scientific Reports under a no-nonsense title: 'The simple task of lifting five kilograms serves as a predictor of age-related disorders in old adults.'
The large-scale study involved 51,536 'geriatric adults' — that is to say 50 and older, a definition that may annoy some — from 14 European countries as well as Israel. It was a roughly even split between men and women, with about a third of the group aged between 60 and 69, another third between 70 and 79, and the rest younger or older. (About 4 per cent were 90 and above.)
Participants were asked to report if they had difficulty lifting five kilograms in 2013 — 80.5 per cent said they did not — and were then followed for several years to see which diseases developed among each group. For a given disease, participants were excluded if they already had it in the baseline year.
Take high blood pressure. In 2013, just under 60 per cent of the group were free of a diagnosis of high blood pressure. Of those, 21.5 per cent went on to develop it. But among the participants who had trouble lifting the weight when the study began, that number amounted to 26.2 per cent.
For hip fractures, the overwhelming majority (97 per cent) did not have one when the study started. But in the years that followed, 3.5 per cent of those who had trouble lifting the weight experienced a hip fracture, versus just 1.5 per cent of those who did not struggle with the weight.
Parsing the data between younger and older ages, the researchers found that men and women under 65 who had trouble lifting five kilograms were most at risk of developing depression, low quality of life, low hand-grip strength (which can also indicate risks of other diseases) and Alzheimer's.
For older men and women who struggled with the weight, risk of Alzheimer's dropped somewhat while the other three conditions remained top of list. But for almost every condition the researchers tracked, struggling to lift five kilograms at the start of the study was a clear indicator of greater risk at the end. The only diseases that didn't fit the pattern were cancer and diabetes, where risk did not change.
The reason for the design of the study was simple. 'Muscle weakness is a risk factor for multiple diseases,' the researchers wrote in their report. 'However, most protocols to assess muscle weakness require clinical settings. A difficulty lifting 5 kg may be a simple measure of muscle weakness in domestic settings. However, no relevant study on assessing muscle weakness has been reported.'
They aimed to fill that gap. 'We suggest that difficulty lifting 5 kg may be a valuable indicator of muscle weakness and poor health in domestic settings. Our findings strongly suggest that this simple, everyday test could be a valuable early indicator of overall health and potential future health challenges.'
If you're looking to try this test at home and don't have a five-kilogram weight handy, there are a number of household objects that come in at about the same mass, including a metal folding chair, a gallon of paint, two reams of printer paper or two bags of flour (conveniently marked 2.5 kg each).The average house cat also tips the scales at about five kilograms, if you can get your hands on one.
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