體驗區
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| 篇名 |
咖啡因和冷刺激對運動代謝和有氧工作效率的影響
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| 並列篇名 |
EFFECTS OF CAFFEINE AND COLD STRESS ON ECERCISE METABOLISM AND AEROBIS WORK EFFICIENCY
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| 作者 |
謝伸裕
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| 中文摘要 |
本验研究咖啡因和冷刺激在人体浸滞水中时对运动恣谢和有氧工作效率（AWE, 每消耗1公升的氧所能做的功）的影响。受试者是十名健康的男子(29.4+3.4岁, 77.1+6.7公斤)浸滞在水中做脚踏车运动55分钟。其运动强度为每公斤体重每分1.5瓦特，平均分钟117+11瓦特。测验情况有四种：28度C非药剂(Placebo)(28P)，28度C咖啡因（每公斤体重5毫克）(28CF)，18度C非药剂(18P)和18度C咖啡因(18CF)。非药剂或咖啡因均在运动前90分钟服用。实验结果发现耗氧量因咖啡因和冷刺激而显著的上升。耗氧量最大者为18C（2.56升╱分）而最小者为28P（2.32升╱分）。AWE则因咖啡因和冷刺激的影响而显著的降低。血液中游离脂肪酸(FFA)因咖啡因而升高，但因冷刺激而被抑制。FFA以28CF(1.24mml/L)最高，以18P(0.62mml/L)最低。血液中的乳酸也显著的受咖啡因和冷刺激的影响而提升。乳酸最高是在18CF(5.6mml/L)而最低是在28P(3.8mml/L)。结论：运动时咖啡和冷刺激能推加式的使耗氧量提升，而同时降低AWE。咖啡因和冷刺激促进的是无氧代谢而不是有氧代谢。
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| 英文摘要 |
Caffeine (Cf) or cold alone affects lipid metabolism. The combined effects of Cf and cold stress on exerciese metabolism and aerobic work efficiency (AWE), defined as work output (Watts) divided by liters of 02 consumed (W/L 02), was studied during head-out impersion. Ten males (29.4+3.4 yrs, 77.1 +6.7 kg) exercised on a cycle ergometer at 1.5 W/kg (117+11 W) for 55 min. The 4 test conditions were: 28 or 18 C water with placebo (P) or Cf (5 mg/kg). Cf or P was ingested 90 min before exercise Qxygen consumption (VO2) at 117W was elevated significantly by Cf and by cold. The highest VO2 occurred at 18Cf (2.56 1/min) with the lowest at 28P (2.23 1/min). AWE was decreased by Cf and cold and varied inversely with VO2. Plasma free fatty acids (FFA) were significantly elevated by Cf nd may be inhibited by cold. The highest FFA occurred at 28Cf (1.24 mmol/L) and the lowest at 18P (0.62 mmol/L). Blood lactate was significantly raised by Cf and by cold. The highest lactate was at 18Cf (5.6 mmol/L) and lowest at 28P (3.8 mmol/L). CONCLUSIONS: Caffeine and cold immersion elevate VO2 additively and thus decrease o.AWE during moderate eccercise. Both Cf and cold seem to promote anaerobic, not aerobic metabolism.
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| 頁次 |
147-161
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| 關鍵詞 |
TSSCI
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| 卷期 |
33:1
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| 日期 |
1988
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| 刊名 |
教育科學研究期刊
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| 出版單位 |
國立臺灣師範大學
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