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FEATURE Fighting Fit


Research from Leeds Beckett University has shown that specialised supplements, commonly used by body-builders, could be the key to helping the elderly get fitter.


Dietary supplements containing specialised amino acids could help elderly people maintain their muscle mass, increase their physical fitness and potentially help them avoid falls, according to researchers at Leeds Beckett University.


The team gave the supplements to a cohort of elderly people over a three month period, and tested them both before and afterwards to assess whether their physical fitness and strength had improved.


Some of the participants took supplements containing the amino acids, while others took a placebo. The researchers found significant improvements among the volunteers taking the amino acid supplement.


Amino acids are important because they are the building blocks of proteins which are responsible for building muscle tissue. Many of these amino acids are not made by our bodies, but supplied through the food we eat.


For elderly people, maintaining muscle mass becomes problematic. From the age of 65 onwards it starts to decrease at greater rates, leading to a loss of physical strength and increased frailty. This can cause falls, fractures and other disabilities placing a growing burden on health and care services.


Leeds Beckett University found that increasing the amount of protein in the diet would help, but high protein diets make people feel fuller, so they are less likely to be able to get enough of the other nutrients and energy that they need from food.


The Study The researchers, based in the University’s School of Sport,


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examined whether essential amino acids could be added instead to the diets of elderly people to improve muscle mass. The supplements were given, in capsule form, to a cohort of 25 people aged between 65 and 75.


16 people received a supplement that included differing concentrations of Leucine, an important amino acid which is popular among body builders as it is known to boost the body’s ability to make muscle from protein. The overall amount of supplement each person was given was based on their body weight. The remaining nine people took a placebo capsule.


“The improvements we measured could be


useful among the healthy elderly population, to help them meet their daily energy needs and regain physical fitness.”


Each member of the cohort was tested at the start of the trial with a series of simple physical and body composition tests, including a handgrip test, a six-minute walk test to assess aerobic capacity, and a 30-second chair stand test


to assess


their muscle mass and the function of their muscles.


Leaps & Bounds After three months of taking the supplement, they were tested again to see if these had improved. The results showed clear evidence of performance improvements in both amino acid groups whilst the group


taking supplements containing higher levels of Leucine also showed gains of more than 1% in muscle mass.


Dr Theocharis Ispoglou, who led the study, commented: “The improvements we measured in people taking these higher levels of Leucine clearly show that amino acid supplements have real potential for improving the physical condition of elderly people. This could be useful among the healthy elderly population, to help them meet their daily energy needs, or it could be useful in the or clinic, to help frail elderly people regain some physical fitness.”


The researchers also reported that the study subjects found it difficult to take the full dose of supplement, which required up to 30 capsules to be taken over the course of a day. Dr Ispoglou and his team have developed more palatable forms of the supplement that allow higher concentrations to be delivered via flavoured gels or bars. A larger study, which included these new products, has recently been completed and preliminary analysis of data has shown clear benefits in relation to appetite and palatability for both the gel and the bar.


Dr Ispoglou added: “This study has opened up exciting new opportunities where these supplements can potentially assist elderly people to meet their energy and protein needs, and ultimately lead a healthier and independent lifestyle for as long as possible.”


www.leedsbeckett.ac.uk - 11 -


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