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最終更新日：2024/05/18
小島 千尋
コジマ チヒロ
(Chihiro Kojima)
論文
- タイトル
- タイトル（英）
- Effect of low energy availability during three consecutive days of endurance training on iron metabolism in male long distance runners.
- 参照URL
- https://researchmap.jp/c-kojima1027/published_papers/31674418
- 著者
- 著者（英）
- Aya Ishibashi,Chihiro Kojima,Yoko Tanabe,Kaito Iwayama,Tsutomu Hiroyama,Toshiki Tsuji,Akiko Kamei,Kazushige Goto,Hideyuki Takahashi
- 担当区分
- 概要
- 概要（英）
- 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 ˙ O2max ) 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 < .05 vs. day1), whereas no significant change was observed throughout the training period in NEA condition. On day 3, muscle glycogen content before exercise was negatively correlated with serum iron level (immediately after exercise, 3 hr after exercise), serum hepcidin level immediately after exercise, and plasma IL-6 level immediately after exercise (p < .05). Moreover, serum hepcidin level on day 4 was significantly higher in LEA condition than that in NEA condition (p < .05). In conclusion, three consecutive days of endurance training under LEA reduced the muscle glycogen content with concomitant increased serum hepcidin levels in male long distance runners.
- 出版者・発行元
- 出版者・発行元（英）
- 誌名
- 誌名（英）
- Physiological Reports
- 巻
- 8
- 号
- 12
- 開始ページ
- e14494
- 終了ページ
- 出版年月
- 2020年6月
- 査読の有無
- 査読有り
- 招待の有無
- 掲載種別
- 研究論文（学術雑誌）
- ISSN
- DOI URL
- https://doi.org/10.14814/phy2.14494
- 共同研究・競争的資金等の研究課題