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題 名 | 低氧與運動訓練對肌肉肝醣儲存的影響=Effects of Hypoxia and Exercise Training on Glycogen Synthesis in Different Muscles |
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作 者 | 邱麗玲; 卓玉敏; 郭家驊; | 書刊名 | 大專體育學刊 |
卷 期 | 3:1 2001.07[民90.07] |
頁 次 | 頁87-97 |
分類號 | 528.9012 |
關鍵詞 | 肌肉肝醣; 長期低氧; 運動訓練; 葡萄糖耐受性驗試; Glycogen supercompensation; Hypoxia; |
語 文 | 中文(Chinese) |
中文摘要 | 本研究觀察影響葡萄糖代謝因子之一的低氧環境是否也會使肌肉肝醣儲存量增加 及長期低氧環境下運動訓練所增加的肝醣儲存,兩者間是否會產生交互影響。實驗設計將受 試動物雄性 SD 鼠分為四組, 控制組( N=8 )、運動訓練組( N=8 )、低氧組( N=8 ) 及低氧╱運動組( N=8 )。 運動訓練以游泳方式連續實施兩週, 每週五天; 長期低氧( FIO �� =0.14 )以氮氧 86 %混合至 14 %氧氣方式連續實施 21 天, 低氧每天實施 12 小時。 在運動與低氧結束後為觀察肝醣儲存量,立即以胃管補充每公斤體重 2 克葡萄糖( 濃度 50 % w/v ), 並於運動後 16 小時內以手術將腓腸肌紅肌、白肌( Gastrocnemius )、比目魚肌( Soleus )、 蹠肌( Plantaris )、心肌( Heart muscle )、股四頭肌 紅肌、白肌( Quadriceps )分離分析。 結果在葡萄糖耐受性試驗, 空腹及攝食葡萄糖後 15 分鐘, 低氧運動組的血糖值顯著地低於控制組,在長期低氧的環境下股四頭肌白肌肝醣 儲存量明顯的增加,其餘沒有顯著差異。另外運動訓練與低氧環境對於肝醣合成的交互影響 特別地表現在紅白混合肌( plantaris )上。 結論,低氧造成的肝醣儲存量增加可能有肌 肉型態的特異性。 |
英文摘要 | In general, as the intensity of exercise increased, the relative contribution of glycogen as muscular fuel increased. The purpose of this study was to test the hypothesis that the extent of glycogen supercompensation in exercised muscle is increased by long-term hypoxia. Rats with (HT) or without (T) 12-hour daily hypoxia were trained by utilizing a 3-week swimming program in which the duration of swimming was gradually increased from 3 h/day for the first one weeks to 6 h/day for the last two weeks. An additive effect of hypoxia on exercise-improved glucose tolerance was observed. Additionally, the mean glucose concentration in untrained non-yhypoxic control rats (C) was significantly greater than both trained (T and HT) and hypoxic rats (H) at 0, 15, and 45 min after a 2-gram of glucose/per kg bodyweight load. Glycogen concentrations of soleus, plantaris, red and white、 gastrocnemius quadriceps, and heart muscles were measured in all rats 16 hours after the T and HT rats has completed their exercise. Glycogen supercompensation was observed in all trained muscle (T and HT) except white quadriceps muscle (p<0.05). Furthermore, the additive effect of hypoxia on post-exercise glycogen supercompensation was only observed in plantaris muscle (p<0.05). The concentration of glycogen in white quadriceps muscle averaged 25 ± 1.78 mmol/kg in the H group was significantly greater than all other groups (C: 20.3 ± 1.42, T: 21.4 ± 0.93, HT: 22.48 ± 1.35 mmol/kg, P<0.05). We conclude that the interactive effect of hypoxia on glycogen supercompensation in skeletal muscle was muscle-specific. |
本系統中英文摘要資訊取自各篇刊載內容。