| The Effects of Resistance Exercise and Post-Exercise Meal Timing on the Iron Status in Iron-Deficient Rats. | |
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MedLine Citation:
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PMID: 22127833 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Resistance exercise increases heme synthesis in the bone marrow and the hemoglobin in iron-deficient rats. Post-exercise early nutrient provision facilitates skeletal muscle protein synthesis compared to late provision. However, the effects of post-exercise nutrition timing on hemoglobin synthesis are unclear. The current study investigated the effect of post-exercise meal timing on the activity of the key enzyme involved in hemoglobin synthesis, δ-aminolevulinic acid dehydratase (ALAD), in the bone marrow and examined the hemoglobin concentration in iron-deficient rats. Male 4-week-old Sprague-Dawley rats were fed an iron-deficient diet containing 12 mg iron/kg and performed climbing exercise (5 min × 6 sets/day, 3 days/week) for 3 weeks. The rats were divided into a group fed a post-exercise meal early after exercise (E) or a group fed the meal 4 h after exercise (L). A single bout of exercise performed after the 3-week training period increased the bone marrow ALAD activity, plasma iron concentration, and transferrin saturation. Although the plasma iron concentration and transferrin saturation were lower in the E group than the L group after a single bout of exercise, the basal hematocrit, hemoglobin, and TIBC after 3 weeks did not differ between the groups. Therefore, resistance exercise increases the bone marrow ALAD activity, while the post-exercise meal timing has no effect on the hemoglobin concentration in iron-deficient rats. |
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Authors:
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Takako Fujii; Tatsuhiro Matsuo; Koji Okamura |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-11-30 |
Journal Detail:
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Title: Biological trace element research Volume: - ISSN: 1559-0720 ISO Abbreviation: - Publication Date: 2011 Nov |
Date Detail:
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Created Date: 2011-11-30 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7911509 Medline TA: Biol Trace Elem Res Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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Exercise Nutrition Laboratory, Graduate School of Sport Sciences, Osaka University of Health and Sport Sciences, Osaka, Japan, 210d04@ouhs.ac.jp. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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