目的：本研究旨在觀察誘發活化後增能作用 (post-activation potentiation, PAP) ，對於隨後腳踏車運動的運動耐受性與攝氧動力學的影響。方法：本研究招募12名大專甲組男性為受試者，採用重複量數，隨機且平衡次序的實驗設計。所有受試者需先進行熟悉實驗，而後進行5RM (repetition maximum) 半蹲肌力測驗，以及遞增負荷運動測驗以訂定誘發PAP、高 (heavy) 與激烈 (severe) 強度腳踏車運動時之強度，測驗間隔48小時。受試者於隨後的四次測驗中，進行PAP處理 (4組5RM的半蹲，組間休息3分鐘) 或控制 (CON) 處理 (靜坐20分鐘) ，隨後進行高強度或激烈強度之腳踏車運動測驗。過程中，肺部的攝氧量與股外側肌的攝氧情況分別使用可攜式的能量代謝分析儀以及近紅外線光譜儀 (NIRS) 全程監測。結果：高強度腳踏車運動下，PAP處理的肺部攝氧動力學之平均反應時間 (mean response time, MRT) 顯著低於CON處理 (PAP處理 vs. CON處理，71 ± 42秒 vs. 107 ± 78秒，p < .05) 。在激烈強度運動之下，PAP處理的運動衰竭時間顯著優於CON處理 (PAP處理 vs. CON處理，261 ± 94秒 vs. 192 ± 39秒，p < .05) 。激烈強度下使用NIRS監測的肌肉攝氧情況，進行PAP處理的MRT會顯著低於CON處理 (PAP處理 vs. CON處理，20 ± 4秒 vs. 26 ± 6秒，p < .05) 。結論：以4組5RM半蹲熱身誘發PAP後，可能可以加速高強度運動之肺部攝氧動力學，並且可能可以提升激烈強度下的運動耐受性，並且提升肌肉中攝氧動力學的速度。

Purpose: To investigate the effects of post-activation potentiation (PAP) on subsequent cycling exercise tolerance and oxygen kinetics. Methods: Twelve well-trained college male students were voluntarily recruited in this repeated measures and randomized crossover designed study. After a familiarization trial, each participant was asked to perform a 5RM (repetition maxmium) squats test and a graded exercise test, which was separated by 48 hours, to determine the intensities of PAP, and heavy and severe cycling tests. During the following four visits, all participants performed PAP (4 sets of 5RM squats with 3-min rest intervals) or control (CON, sit for 20 minutes) treatments before heavy or severe cycling test. During the cycling test, the pulmonary gas exchange and muscle oxygenation of vastus lateralis were respectively measured by a portable gas analysis system and near-infrared spectroscopy (NIRS). Results: During the heavy cycling test, the mean response time (MRT) in PAP condition was significantly faster than that in CON (PAP vs. CON, 71 ± 42 vs. 107 ± 78 s, p < .05). During the severe cycling test, the time to exhaustion in PAP was significantly higher than that in CON (PAP vs. CON, 261 ± 94 vs. 192 ± 39 s, p < .05). During severe cycling test, MRT measured by NIRS in PAP condition was significantly faster than that in CON (PAP vs. CON, 20 ± 4 vs. 26 ± 6 s, p < .05). Conclusion: PAP induced by 4 sets of 5 RM squats might enhance pulmonary oxygen uptake kinetics during heavy-intensity exercise, and might improve exercise tolerance and muscle deoxyhemoglobin kinetics during severe-intensity exercise.

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