目的：探討在常氧與低氧環境下進行2000m室內划船運動時，對於運動員心跳率、血乳酸及運動表現之影響。方法：以7名大專競技運動員爲硏究對象。所有受試者以平衡次序的方式於常氧（20%)及低氧 (15%)環境分別進行一次2000m高強度無氧負荷測試，兩次測試間隔 7天。結果：本硏究發現，在常氧環境下，0-500m的槳頻爲29.3±3.5 SPM，平均輸出功率爲155.1±36.3Watt。然而1500-2000m之槳頻爲 32.9i4.5SPM，平均輸出功率爲184.5±39.6 Watt，達顯著差異（p<.05)；低氧環境0-500m與1500-2000m平均輸出功率下降了 24.3±0.4Watt，達顯著差異（p<.05)，而槳頻則未達顯著差異。在兩者相互比較下，常氧 0- 500m之平均輸出功率比低氧減少了 28.5±0.9Watt (p<.05 )，1500-2000m常氧比低氧增加了 25.2±0.7Watt (p<.05)，而槳頻則未達顯著差異。在血乳酸方面，常氧環境下血乳酸7.8±1.3mmoM，顯著低於低氧環境10.2±2.6mmol/l (p<.05)，心跳率則未達顯著差異。結論：在低氧環境下進行2000m室內划船運動時，相較於常氧環境下，受試者無法維 持高力量輸出，同時，血乳酸濃度明顯高於常氧環境，亦即在低氧下進行運動時，其負荷量將大於常氧環境。

The purpose of this study was to investigate the impact of 2000 m rowing ergometer in in the normoxia and hypoxia environments on athletes’ heart rates, blood lactic concentration, and sports performance. Method: The subjects were seven college athletes. By counter balance, each subject participated in the 2000 m high intensity anaerobic test in normoxia (20%) and hypoxic (15%) environments. Two tests were seven days apart. Result: Result showed that in the normoxia environment, the Stroke per minute of 0-500 m was 29.3士3.5 SPM, and the Average power output was 155.1 士36.3 Watt, while the Stroke per minute of 1500-2000 m was 32.9士4.5 SPM, and the Average power output was 184.5士39.6 Watt. There was a significant difference between the SPM and Watt of the two distances (p<.05). In the Hypoxia environment, the Average power output of 1500-2000 m decreased by 24.3士0.4 Watt compared to that of the 0-500 m. There was a significant difference between the Watt of the two distances (p<.05). However, there was no significant difference between the SPM of the two distances. The 0-500 m Average power output in normoxia decreased by 28.5士0.9 Watt (p<.05) compared to that in hypoxia. The 1500-2000 m Average power output in normoxia increased by 25.2士0.7 Watt (p<.05) compared to that in the hypoxia. However, there was no significant difference between the SPM in the two environments. As for blood lactic concentration, in normoxia it was 7.8士 1.3 mmol/1, which was significantly lower than 10.2士2.6 mmol/1 in the hypoxia (p<.05). The heart rates in both normoxia and hypoxia remained the same. Conclusion: In contrast to the normoxia environment, the subjects of 2000 m rowing ergometer in the hypoxia environment cannot remain their power. At the same tame, their blood lactic concentration was significantly higher. In short, the loading of the subjects was heavier when they exercised in hypoxia than in normoxia.