Defense Institute of Physiology and Allied Sciences, Timarpur, Delhi.
Defense Institute of Physiology and Allied Sciences, Timarpur, Delhi.
Nutrition. 2017 Nov-Dec;43-44:75-82. doi: 10.1016/j.nut.2017.06.005. Epub 2017 Jul 5.
The concentration of nutritionally important minerals in circulation is under tight homeostatic control, however, physical activity and aging influence their body stores and nutritional requirement. The aim of this study was to evaluate the effect of both physical activity and age on plasma concentrations of copper, zinc, iron, and magnesium.
Stratified cluster sampling was used for selection of study participants (N = 360) belonging to three physical activity groups: sedentary, moderately active, and highly active on the basis of their physical activity levels as 1.53, 1.8, and 2.3, respectively. They were also divided into six different age groups (18-20, 21-25, 26-30, 31-35, 36-40, and 41-45 y). We assessed nutritional status by determining their body composition using bioelectrical impedance method and measuring intake levels. Fasting blood samples were taken to separate plasma for analysis of copper, zinc, magnesium, and iron.
There was a major difference (P < 0.001) in the mean value of plasma copper, zinc, magnesium, and iron for the three activity groups. The plasma copper and iron concentrations were higher in the moderately active group (copper: 1.59 ± 0.05 mg/L, iron: 0.79 ± 0.22 mg/L) whereas zinc concentration was higher in the sedentary group (2.37 ± 0.29 mg/L). Both the highly and moderately active groups had higher plasma magnesium levels compared with the sedentary group. Plasma copper, zinc, magnesium, and iron levels also were influenced by age in a different pattern with respect to physical activity.
Physical activity-related energy expenditure and age play a remarkable role in deciphering the plasma mineral levels in the healthy individuals.
循环中营养重要矿物质的浓度受到严格的体内平衡控制，但身体活动和衰老会影响其体内储存和营养需求。本研究旨在评估身体活动和年龄对血浆铜、锌、铁和镁浓度的影响。
采用分层聚类抽样选择研究参与者（n=360），他们根据身体活动水平属于三个身体活动组：久坐、中度活跃和高度活跃，分别为 1.53、1.8 和 2.3。他们还被分为六个不同的年龄组（18-20、21-25、26-30、31-35、36-40 和 41-45 岁）。我们通过使用生物电阻抗法评估身体成分并测量摄入量来评估营养状况。采集空腹血样分离血浆，用于分析铜、锌、镁和铁。
三个活动组的血浆铜、锌、镁和铁的平均值存在显著差异（P<0.001）。中度活跃组的血浆铜和铁浓度较高（铜：1.59±0.05mg/L，铁：0.79±0.22mg/L），而锌浓度在久坐组较高（2.37±0.29mg/L）。高度活跃组和中度活跃组的血浆镁水平均高于久坐组。血浆铜、锌、镁和铁水平也因身体活动而以不同的模式受到年龄的影响。
与身体活动相关的能量消耗和年龄在阐明健康个体的血浆矿物质水平方面起着重要作用。
