Associations of protein intake, sources and distribution on muscle strength in community-dwelling older adults living in Auckland, New Zealand.

IF 2.4 Q3 NUTRITION & DIETETICS
Journal of Nutritional Science Pub Date : 2023-08-23 eCollection Date: 2023-01-01 DOI:10.1017/jns.2023.76
Anne N Hiol, Pamela R von Hurst, Cathryn A Conlon, Kathryn L Beck
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Abstract

Protein intake, sources and distribution impact on muscle protein synthesis and muscle mass in older adults. However, it is less clear whether dietary protein influences muscle strength. Data were obtained from the Researching Eating Activity and Cognitive Health (REACH) study, a cross-sectional study aimed at investigating dietary patterns, cognitive function and metabolic syndrome in older adults aged 65-74 years. Dietary intake was assessed using a 4-d food record and muscle strength using a handgrip strength dynamometer. After adjusting for confounders, in female older adults (n 212), total protein intake (β = 0⋅22, P < 0⋅01); protein from dairy and eggs (β = 0⋅21, P = 0⋅03) and plant food sources (β = 0⋅60, P < 0⋅01); and frequently consuming at least 0⋅4 g/kg BW per meal (β = 0⋅08, P < 0⋅01) were associated with higher BMI-adjusted muscle strength. However, protein from meat and fish intake and the coefficient of variance of protein intake were not related to BMI-muscle strength in female older adults. No statistically significant associations were observed in male participants (n = 113). There may be sex differences when investigating associations between protein intake and muscle strength in older adults. Further research is needed to investigate these sex differences.

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新西兰奥克兰社区老年人蛋白质摄入量、来源和分布与肌肉力量的关系。
蛋白质摄入、来源和分布对老年人肌肉蛋白质合成和肌肉质量的影响。然而,目前尚不清楚饮食蛋白质是否会影响肌肉力量。数据来自研究饮食活动和认知健康(REACH)研究,这是一项横断面研究,旨在调查65-74岁老年人的饮食模式、认知功能和代谢综合征。使用4天食物记录评估饮食摄入量,并使用握力测功机评估肌肉力量。在校正混杂因素后,女性老年人(n 212)的总蛋白质摄入量(β=0·22,P<0·01);乳制品和鸡蛋中的蛋白质(β=0∙21,P=0∙03)和植物性食物来源(β=0・60,P<0∙01);和经常每餐至少摄入0·4g/kg体重(β=0·08,P<0·01)与较高的BMI调整肌肉力量有关。然而,肉类和鱼类摄入的蛋白质以及蛋白质摄入的变异系数与女性老年人的BMI肌肉力量无关。在男性参与者中没有观察到统计学上显著的关联(n=113)。在研究老年人蛋白质摄入与肌肉力量之间的关系时,可能存在性别差异。需要进一步的研究来调查这些性别差异。
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来源期刊
Journal of Nutritional Science
Journal of Nutritional Science NUTRITION & DIETETICS-
CiteScore
3.00
自引率
0.00%
发文量
91
审稿时长
7 weeks
期刊介绍: Journal of Nutritional Science is an international, peer-reviewed, online only, open access journal that welcomes high-quality research articles in all aspects of nutrition. The underlying aim of all work should be, as far as possible, to develop nutritional concepts. JNS encompasses the full spectrum of nutritional science including public health nutrition, epidemiology, dietary surveys, nutritional requirements, metabolic studies, body composition, energetics, appetite, obesity, ageing, endocrinology, immunology, neuroscience, microbiology, genetics, molecular and cellular biology and nutrigenomics. JNS welcomes Primary Research Papers, Brief Reports, Review Articles, Systematic Reviews, Workshop Reports, Letters to the Editor and Obituaries.
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