Effect of low energy availability during three consecutive days of endurance training on iron metabolism in male long distance runners
Effect of low energy availability during three consecutive days of endurance training on iron metabolism in male long distance runners
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DOI：
10.14814/phy2.14494
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发表时间：
2020-06-01
影响因子：
2.5
通讯作者：
Takahashi, Hideyuki
中科院分区：
文献类型：
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作者：
Ishibashi, Aya;Kojima, Chihiro;Takahashi, Hideyuki
研究连续3天耐力训练中低能量利用率（莱亚）对肌糖原含量和铁代谢的影响。六名男子长跑运动员在莱亚或中性能量可用性（NEA）条件下完成了连续三天的耐力训练。莱亚的能量可用性设定为20 kcal/kg无脂肪质量（FFM）/天，NEA为45 kcal/ kg FFM/天。受试者在第1-3天以最大摄氧量的70%（（V）超过dotO（2 max））跑步75分钟。在第1- 4天禁食过夜后、第3天运动后立即和3小时收集静脉血样。通过碳-磁共振光谱法评估第1-4天的肌糖原含量。在莱亚条件下，2-4日龄体重、肌糖原含量和FFM均显著低于1日龄（p
We investigated the effect of low energy availability (LEA) during three consecutive days of endurance training on muscle glycogen content and iron metabolism. Six male long distance runners completed three consecutive days of endurance training under LEA or neutral energy availability (NEA) conditions. Energy availability was set at 20 kcal/kg fat-free mass (FFM)/ day for LEA and 45 kcal/ kg FFM/day for NEA. The subjects ran for 75 min at 70% of maximal oxygen uptake ((V) over dotO(2max)) on days 1-3. Venous blood samples were collected following an overnight fast on days 1- 4, immediately and 3 hr after exercise on day 3. The muscle glycogen content on days 1-4 was evaluated by carbon-magnetic resonance spectroscopy. In LEA condition, the body weight and muscle glycogen content on days 2-4, and the FFM on days 2 and 4 were significantly lower than those on day1 (p