...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Medicine and science in sports and exercise >The Impact of Morning versus Afternoon Exercise on Iron Absorption in Athletes
【24h】

The Impact of Morning versus Afternoon Exercise on Iron Absorption in Athletes

机译：早上与下午运动对运动员的铁吸收的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Purpose This study examined postexercise inflammatory, hepcidin, and iron absorption responses to endurance exercise performed in the morning versus the afternoon. Methods Sixteen endurance-trained runners (10 male, 6 female) with serum ferritin (sFer) < 50 mu g center dot L-1 completed a 90-min running protocol (65% vVO(2max)) in the morning (am), or the afternoon (pm), in a crossover design. An iron-fortified fluid labeled with stable iron isotopes (Fe-57 or Fe-58) was administered with a standardized meal 30 min following the exercise and control conditions during each trial, serving as a breakfast and dinner meal. Venous blood samples were collected before, immediately after, and 3 h after the exercise and control conditions to measure sFer, serum interleukin-6 (IL-6), and serum hepcidin-25. A final venous blood sample was collected 14 d after each trial to determine the erythrocyte iron incorporation, which was used to calculate iron absorption. Linear mixed-modeling was used to analyze the data. Results Overall, exercise significantly increased the concentrations of IL-6 (4.938 pg center dot mL(-1); P = 0.006), and hepcidin-25 concentrations significantly increased 3 h after exercise by 0.380 nM (P < 0.001). During the pm trial, hepcidin concentrations exhibited diurnal tendency, increasing 0.55 nM at rest (P = 0.007), before further increasing 0.68 nM (P < 0.001) from prerun to 3 h postrun. Fractional iron absorption was significantly greater at breakfast after the am run, compared with both the rested condition (0.778%; P = 0.020) and dinner in the am run trial (0.672%; P = 0.011). Conclusions Although exercise resulted in increased concentrations of IL-6 and hepcidin, iron was best absorbed in the morning after exercise, indicating there may be a transient mechanism during the acute postexercise window to promote iron absorption opposing the homeostatic regulation by serum hepcidin elevations.
机译：目的本研究检查了炎症，肝素和铁的耐血液锻炼和下午进行的耐力运动。方法使用血清铁蛋白（SFER）<50 mu G中心点L-1的16次耐久训练赛跑者（10只雄性，6个雌性）完成了90分钟的运行方案（65％VVO（2max）），或者下午（PM），在交叉设计中。在每次试验期间的运动和控制条件下，用标准化的膳食施用标有稳定的铁同位素（Fe-57或Fe-58）的铁强化液，在每次试验期间的运动和控制条件下，用作早餐和晚餐。在运动和控制条件下，在运动和控制条件下，以后，在3小时以后收集静脉血样，以测量SFER，血清白细胞介素-6（IL-6）和血清肝素-25。每次试验后收集最终静脉血液样品14d，以确定用于计算铁吸收的红细胞铁掺入。线性混合建模用于分析数据。结果总体而言，运动显着增加了IL-6的浓度（4.938Pg中心点M1（-1）; p = 0.006），运动后肝素-25浓度显着增加3小时，运动速度为0.380nm（p <0.001）。在PM试验期间，Hepcidin浓度表现出昼夜倾向，静置时增加0.55nm（p = 0.007），然后从Prerun进一步增加0.68nm（p <0.001），从prerun到3 h postrun。早餐后，在AM运行后，早餐在早餐时，分数较大，与恢复条件（0.778％; p = 0.020）和AM运行试验中的晚餐（0.672％; P = 0.011）。结论虽然运动导致IL-6和肝素的浓度增加，但锻炼后的早晨最佳地被吸收，表明在急性切除窗口期间可能存在瞬态机制，以促进血清肝素升高的稳压调节的铁吸收。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号