Dietary animal protein intake: association with muscle mass index in older women.

Dietary animal protein intake: association with muscle mass index in older women.
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膳食动物蛋白摄入量：与老年女性肌肉质量指数的关系。

DOI：
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发表时间：
2007
期刊：
The Journal of Nutrition, Health & Aging
影响因子：
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通讯作者：
I. Dionne
I. Dionne
中科院分区：
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文献类型：
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作者：
C. Lord;J. Chaput;M. Aubertin;M. Labonte;I. Dionne

文献摘要

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背景 衰老与肌肉质量和力量的减少有关，即所谓的肌肉减少症，并且通常使用肌肉质量指数（MMI = FFM（kg）/身高（m）2）来表征。据信，充足的营养，特别是蛋白质的摄入，可以延缓这种进展，提高老年人的生活质量。 目标 我们研究了老年妇女摄入的主要蛋白质来源（动物或植物）是否与MMI有关。 设计 招募了38名健康、体重正常、久坐不动的女性，年龄在57-75岁之间（平均年龄：66 +/- 5岁），并且没有服用可能影响代谢的药物。身体成分的测定采用双能X线吸收法;肌肉蛋白质含量的测定采用肌酐排泄。通过使用加速度计和间接量热法获得身体活动代谢。最后，通过3天的饮食记录测量蛋白质摄入量。 结果 MMI与体重指数、去脂质量、肌肉蛋白含量、总蛋白摄入量、动物蛋白摄入量、脂肪质量、内脏脂肪和每日能量消耗呈显著相关。然而，逐步回归分析显示动物蛋白摄入量是MMI的唯一独立预测因子（r2=0.19; p=0.008）。 结论 我们的结果表明，蛋白质摄入量，特别是动物来源的蛋白质摄入量，可能与更好地保存MMI有关。然而，还需要更多的研究来证实我们的结果。
BACKGROUND Aging is associated with reductions in muscle mass and strength, so-called sarcopenia, and is generally characterized using muscle mass index (MMI = FFM (kg)/height (m)2). It is believed that adequate nutrition especially regarding protein intake, can delay this progression and enhance the quality of life of elders. OBJECTIVES We examined whether the predominant source of protein consumed (animal or vegetal) by older women was associated with MMI. DESIGN Thirty-eight healthy, normal weight, sedentary women, aged between 57-75 years (mean age: 66 +/- 5 years old), and taking no medication that could influence metabolism were recruited. Body composition was measured by dual-energy X-ray absorptiometry; muscle protein content was measured by the use of creatinine excretion. Physical activity metabolism was obtained by the use of accelerometry, and indirect calorimetry. Finally, protein intake was measured with a 3-day dietary record. RESULTS Significant correlations were observed between MMI and body mass index, fat-free mass, muscle protein content, total protein intake, animal protein intake, fat mass, visceral fat and daily energy expenditure. However, a stepwise regression analysis showed animal protein intake to be the only independent predictor of MMI (r2=0.19; p=0.008). CONCLUSIONS Our results suggest that protein intake, especially from animal sources, may be associated with a better preservation of MMI. However, more research is needed to confirm our results.