Evaluation of muscle energy metabolism during exercise for effective altitude training
| Project/Area Number |
20700533
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Sports science
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| Research Institution | National Agency for the Advancement of Sports and Health |
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Principal Investigator |
HOMMA Toshiyuki National Agency for the Advancement of Sports and Health, スポーツ科学研究部, 研究員 (90392703)
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| Project Period (FY) |
2008 – 2010
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| Project Status |
Completed (Fiscal Year 2010)
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| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2010: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2009: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2008: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
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| Keywords | 筋エネルギー代謝 / 低酸素 / 磁気共鳴分光法 / 近赤外分光法 / 無酸素的代謝 / 有酸素的代謝 / 筋酸素消費量 / 高地トレーニング / リン31-磁気共鳴分光法 / 例酸素環境 |
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| Research Abstract |
We investigated the differences in muscle energy metabolism during a knee extension exercise of varying intensities under conditions of normoxia and hypoxia. The values of muscle phosphocreatine (PCr), pH, and oxygen consumption (VO_<2mus>) were significantly lower at submaximal identical workloads under hypoxic conditions than at normoxic conditions (p<0.05). At exhaustion, in both the conditions, there was an almost complete depletion of the muscle PCr and no difference in the values of muscle PCr. However, the muscle pH and VO_<2mus> at exhaustion were significantly lower during hypoxic conditions than during normoxic conditions (p<0.05). The results of this study suggest that as compared to normoxic conditions, hypoxic conditions cause a decrease in the aerobic energy supply and an increase in the anaerobic energy supply in muscles during exercise at identical workloads.
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Report
(4 results)
Research Products
(5 results)
