目的：本研究旨在探討划船選手在接受上肢或下肢缺血預處理 (ischemic preconditioning, IPC) 後，是否能促進2000公尺室內划船的運動表現。方法：共14名高中男性划船選手參與本研究 (年齡，17 ± 1歲；身高，174 ± 6公分；體重，66 ± 5公斤；2000公尺划船最佳成績，439 ± 15秒)，依隨機分派及平衡次序方式，分別進行三種實驗處理：UIPC (220 mmHg壓脈帶於雙上臂近端)、LIPC (220 mmHg壓脈帶於雙大腿近端)，以及SHAM (40 mmHg壓脈帶於雙大腿近端)；每種實驗處理共進行3循環的5分鐘缺血/5分鐘再灌流。實驗處理後50分鐘再進行2000公尺划船測功儀計時測驗。結果：2000公尺划船測驗的完成時間，在三種實驗處理之間無顯著差異 (UIPC vs. LIPC vs. SHAM, 445 ± 14秒 vs. 447 ± 16秒 vs. 448 ± 11秒, F = 1.002, p > .05)。每500公尺分段的平均功率方面，三種實驗處理之間亦無顯著差異。不同的實驗處理，亦不影響划船測驗結束時的血乳酸、最大心率，及運動自覺強度。以近紅外線光譜儀分析，發現LIPC會顯著增加休息前20分鐘股四頭肌的血流量 (LIPC vs. SHAM, p < .05)，然而，划船時的肌肉氧飽合度及血流量，均不受實驗處理影響。結論：LIPC可增加安靜休息時的肌肉血流量，然而，無論是上肢或下肢IPC，均無法改善2000公尺室內划船之運動表現。

Purpose: To investigate the effect of upper limb and lower limb ischemic preconditioning (IPC) on 2000-m indoor rowing performance. Methods: Fourteen senior high school male rowers were recruited (age, 17 ± 1 years；body height，174 ± 6 cm；body weight，66 ± 5 kg；best 2000-m indoor rowing record, 439 ± 15 s). In a randomized and counterbalanced design, participants received 3 treatments, the upper limbs IPC (UIPC, 220 mmHg cuff over proximal arms), the lower limbs IPC (LIPC, 220 mmHg cuff over proximal thighs), and SHAM treatment (40 mmHg cuff over proximal thighs). After three cycles of 5-min ischemia and 5-min reperfusion, participants rested for 50 minutes, followed by 2000-m rowing ergometer time trial. Results: There was no significant difference among the 3 treatments on 2000-m rowing time (UIPC vs. LIPC vs. SHAM, 445 ± 14 vs. 447 ± 16 vs. 448 ± 11 s, F = 1.002, p > .05). The average power output of each 500-m was also not significantly different among treatments. The serum lactate concentration, maximal heart rate and rating of perceived exertion after rowing were not affected by different treatments. LIPC significantly increased the blood flow of vastus lateralis muscle during the first 20 min of resting phase (LIPC vs. SHAM, p < .05), as measured by near-infrared spectroscopy. However, the tissue saturation index and blood flow during rowing were not significantly different among treatments. Conclusion: LIPC could increase muscular blood flow at rest, however, neither upper nor lower limbs IPC has ergogenic effect on 2000-m rowing performance.

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