A Significant Relationship between Plasma Vitamin C Concentration and Physical Performance among Japanese Elderly Women
A Significant Relationship between Plasma Vitamin C Concentration and Physical Performance among Japanese Elderly Women
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DOI：
10.1093/gerona/glr174
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发表时间：
2012-03-01
影响因子：
5.1
通讯作者：
Suzuki, Takao
中科院分区：
文献类型：
--
作者：
Saito, Kyoko;Yokoyama, Tetsuji;Suzuki, Takao
保持体力活动可以提高老年人的生活质量。最近的研究表明，抗氧化维生素（如维生素C）的摄入量和老年人的身体表现之间存在有益的关系。本研究的目的是探讨血浆维生素C浓度和日本社区居住的老年女性的身体活动之间的关系。这是一个横截面研究，涉及居住在东京，日本，在2006年10月的城市地区的老年女性。我们检查了参与者的人体测量、身体表现、生活方式和血浆维生素C浓度。本研究中参与者的平均年龄（+/-标准差）为75.7 +/- 4.1岁。血浆维生素C浓度的几何平均值（几何标准差）为8.9（1.5）μ g/mL。血浆维生素C浓度与握力、睁眼单腿站立时间、步行速度呈正相关，与体重指数呈负相关。调整混杂因素后，四分位血浆维生素C水平与受试者的握力（趋势p = 0.0004）和睁眼单腿站立能力（趋势p = 0.049）显著相关。在社区居住的老年妇女中，血浆维生素C浓度与她们的肌肉力量和体能表现密切相关。
Maintenance of physical performance could improve the quality of life in old age. Recent studies suggested a beneficial relationship between antioxidant vitamin (eg, vitamin C) intake and physical performance in elderly people. The purpose of this study was to examine the relationship between plasma vitamin C concentration and physical performance among Japanese community-dwelling elderly women.This is a cross-sectional study involving elderly females residing in an urban area in Tokyo, Japan, in October 2006. We examined anthropometric measurements, physical performance, lifestyles, and plasma vitamin C concentration of participants.A total of 655 subjects who did not take supplements were analyzed. The mean age (+/- standard deviation) of participants was 75.7 +/- 4.1 years in this study. The geometric mean (geometric standard deviation) of plasma vitamin C concentration was 8.9 (1.5) mu g/mL. The plasma vitamin C concentration was positively correlated with handgrip strength, length of time standing on one leg with eyes open and walking speed, and inversely correlated with body mass index. After adjusting for the confounding factors, the quartile plasma vitamin C level was significantly correlated with the subject's handgrip strength (p for trend = .0004) and ability to stand on one leg with eyes open (p for trend = .049).In community-dwelling elderly women, the concentration of plasma vitamin C related well to their muscle strength and physical performance.