Intermittent short-term graded running performance in middle-distance runners in hypobaric hypoxia
Intermittent short-term graded running performance in middle-distance runners in hypobaric hypoxia
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DOI：
10.1007/s00421-005-1322-7
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发表时间：
2005-06-01
影响因子：
3
通讯作者：
Nishiyasu, T
中科院分区：
文献类型：
--
作者：
Ogawa, T;Ohba, K;Nishiyasu, T
本研究调查了在训练中距离跑步者中，间歇性短期分级跑步表现是否受到低压缺氧环境（模拟2500米）的影响(H)。7名男性中长跑运动员在H和常压常压环境(N)下进行了有氧性能测试和间歇性短期分级无氧跑步性能测试（MART）。H组的VO2max和OBLA显著低于N组（分别降低18.1%和8.7%）。在MART组中，最大跑步速度（V-max）和排气时间在N和H组中均无差异(分别为454 (7)m min（-1）和451 (6)m min(-1), 208.7 （5.2) s和205.7 (4.2)s）。亚最大跑步速度（425m min(-1)）时，H组血乳酸浓度显著高于N组（配对t检验：P < 0.05）。这些结果表明，在训练有素的中距离跑步者中，间歇性短期分级跑步性能不受H的影响，尽管在有氧性能测试中H的有氧功率显著降低。
This study investigated whether in trained middle-distance runners, intermittent short-term graded running performance is affected by a hypobaric hypoxic environment (simulated 2,500 m) (H). Seven male middle-distance runners performed an aerobic performance test and an intermittent short-term graded anaerobic running-performance test (MART) both in H and in a normobaric normoxic environment (N). VO2max and OBLA were markedly lower (by 18.1% and 8.7%, respectively) in H than in N. In MART, neither maximal running velocity (V-max) nor exhaustion-time was different between N and H (454 (7) m min(-1) vs. 451 (6) m min(-1), respectively, and 208.7 (5.2) s vs. 205.7 (4.2) s, respectively). The blood lactate concentration at sub-maximal running speed (425m min(-1)) was significantly greater in H than in N (paired t-test: P < 0.05). These results suggest that, in trained middle-distance runners, intermittent short-term graded running performance is not affected by H, despite a considerable decrease in aerobic power in H during the aerobic performance test.