不同運動休息比高強度循環運動對心肺適能之影響

Abstract

目的：探討不同運動休息比之高強度循環運動 (high-intensity circuit exercise, HICE) 對於心肺適能與能量使用比例之影響。方法：本研究共招募12名健康男性。依平衡次序進行相同總運動時間之HICE20 (20秒：10秒運動休息比) 與HICE30 (30秒：10秒運動休息比) 兩種實驗介入。HICE的動作模式包括抬膝原地跑、弓步蹲、深蹲跳與波比操。在HICE運動期間測量攝氧量、心跳率、運動自覺強度 (rating of perceived exertion, RPE) 與血乳酸濃度，並計算動作反覆次數、花費在高強度運動之累積時間、分組 (運動初期 [S1]、運動中段 [SMid] 與運動末期 [SEnd] ) 之攝氧量與心跳率以及能量使用比例。結果：不同運動休息比之HICE，誘發之總平均攝氧量、心跳率、RPE、血乳酸濃度、高強度運動累積時間與能量使用，均未達顯著差異。然而，HICE30在S1的平均攝氧量與平均心跳率，均顯著高於HICE20 (p< .05)，不過，在時間因子部分，HICE20到SEnd時仍能維持高於S1之心肺刺激 (S1 vs. SMid vs. SEnd，61.33 ± 6.30%VO2max vs. 87.52 ± 7.05%VO2max vs. 86.08 ± 5.68%VO2max)，而HICE30在SEnd時，則顯著下降並低於SMid (S1 vs. SMid vs. SEnd，68.75 ± 6.79%VO2max vs. 89.36 ± 7.23%VO2max vs. 85.15 ± 7.70%VO2max)。HICE30的總反覆次數顯著高於HICE20 (HICE20 vs. HICE30，782.10 ± 132.70次vs. 867.90 ± 126.50次, p < .05)。結論：改變HICE運動休息比不影響心肺刺激與能量消耗分佈。不過，相較於HICE30，HICE20在SEnd更能維持較高的心肺刺激。Purpose: To examine the effects of high-intensity circuit exercise (HICE) with different work-rest ratio on cardiorespiratory capacity and energy usage. Methods: 12 male collegiate students were required to perform 2 treatments in repeated measure and counter-balance order, including HICE20 (20s: 10s work: rest ratio) and HICE30 (30s: 10s work: rest ratio) with equal exercise duration. High knee run, lunge, squat jump and burpee were performed in the workout. Oxygen consumption (VO2), heart rate (HR), rating of perceived exertion (RPE) and blood lactate were recorded during HICE. The number of repetitions, exercise time in high-intensity, VO2 and HR during different phases of exercise (early stage, S1; mid-stage, SMid and last stage, SEnd) and energy usage were calaulated during HICE. Results: No significant differences were found in the average VO2, HR, RPE, blood lactate, the exercise time of high-intensity and energy contribution among treatments. However, VO2 and HR from HICE30 were significantly higher than those in HICE20 during S1 (p< .05). Also, HICE20 appears to sustain in high level of cardiovascular stimulation until SEnd (S1 vs. SMid vs. SEnd，61.33 ± 6.30%maximum oxygen consumption [VO2max] vs. 87.52 ± 7.05%VO2max vs. 86.08 ± 5.68%VO2max, p < .05), while VO2 in HICE30 gradually decreased after SMid (S1 vs. SMid vs. SEnd，68.75 ± 6.79%VO2max vs. 89.36 ± 7.23%VO2max vs. 85.15 ± 7.70%VO2max, p < .05). The number of repetitions in HICE30 was significantly higher than that in HICE20 (HICE20 vs. HICE30，782.10 ± 132.70 times vs. 867.90 ± 126.50 times, p< .05). Conclusion: Manipulation of work: rest ratio in HICE showed no impact on cardiovascular stimulation and energy contribution. However, compared to HICE30, HICE20 remained elevated cardiovascular stimulation levels during SEnd.