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題 名 | 咖啡因對中高強度間歇運動後超額攝氧量的影響=Effect of Caffeine on Excess Post Exercise Oxygen Consumption after Moderate-High Intensity Interval Exercise |
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作 者 | 黃香萍; 蘇玫尹; 林嘉志; 謝伸裕; 王鶴森; | 書刊名 | 體育學報 |
卷 期 | 47:3 2014.09[民103.09] |
頁 次 | 頁349-358 |
分類號 | 528.9012 |
關鍵詞 | 心跳率; 攝氧量; 血乳酸; Heart rate; Oxygen uptake; Lactate acid; |
語 文 | 中文(Chinese) |
中文摘要 | 目的:探討咖啡因對中高強度間歇運動後超額攝氧量(excess post exercise oxygen consumption, EPOC)的影響。方法:8位健康男性受試者(年齡:24.4 ± 0.3歲、身高:174.7 ± 2.4公分;體重:70.8 ± 2.8公斤;VO_2peak:38.6 ± 1.7 mg/kg/min)參與兩次平衡交叉,雙盲且間隔至少一週的實驗處理,一次攝取250毫克的咖啡因膠囊,一次則為安慰劑,兩次增補後統一安靜休息90分鐘,隨即進行中高強度運動,運動方式為先以60%VO_2peak的強度進行腳踏車運動20分鐘後,再進行3組80% VO_2peak運動1分鐘,休息1分鐘的間歇性腳踏車運動。採集受試者攝取咖啡因或安慰劑後第0、25、55、85分鐘之安靜心跳率(heart rate, HR)、呼吸交換率(respiratory exchange ratio, RER)及攝氧量(oxygen uptake, VO_2)。實驗過程中也採集受試者增補前(pre-90)、運動前立即(pre-exe)、運動後恢復期的第4分鐘、240分鐘及480分鐘(post-4、post-240、post-480)之前臂靜脈血液,以及運動後60分鐘之攝氧量。統計方法以相依樣本t考驗檢定總EPOC、快速期EPOC及慢速期EPOC;以重複量數雙因子(treatment × time)變異數分析考驗HR、RER、VO_2及血乳酸濃度之交互作用及差異顯著情形。結果:安靜攝氧量部分,時間與組別交互作用達顯著(F = 7.68, p = .028),咖啡因處理在第25分鐘(5.50 ± 0.36 ml/kg/min, p = .004)、第55分鐘(5.17 ± 0.21 ml/kg/min, p = .032)及第85分鐘(5.36 ± 0.23 ml/kg/min, p = .010)之攝氧量,皆顯著高於第0分鐘(4.35 ± 0.19 ml/kg/min)。EPOC部分,僅咖啡因處理(750.86 ± 91.39 ml)之EPOC快速期顯著高於安慰劑處理(600.27 ± 72.19 ml)(p = .043)。結論:攝取250 mg咖啡因可顯著增加安靜時代謝速率,及中高強度間歇運動後之能量消耗,若日後欲進行中高強度間歇運動,且欲增加能量消耗時,建議可於運動前搭配攝取咖啡因。 |
英文摘要 | Purpose: To investigate the effect of caffeine on excess post exercise oxygen consumption (EPOC) after moderate-high intensity exercise. Method: Eight healthy males (age: 24.4 ± 0.3 yr, height: 174.8 ± 2.4 cm, weight: 70.8 ± 2.8, VO_2peak: 38.6 ± 1.7 ml/kg/min) attended two randomized, cross-over, double-blind trials at least one week apart, one with 250 mg caffeine (Caf) and one with placebo (0 mg caffeine; Pla), and after 90 min rest then completed each exercise session (ES) on cycle ergometer. ES consisting of 20 min of cycling at 60% VO_(2peak) follow by 3 sets of 1-min cycling at 80% VO_(2peak) with a 1-min rest between sets. During each ES, resting VO_2 and 60-min post-exercise VO_2 were measured. Blood sample were drawn at 90 min before exercise, pre-exercise, and 30 min, 240 min, 480 min after exercise. Plasma was analyzed for lactate. VO_2 was measured for the 60 min after the exercise. Data from total EPOC, fast phase EPOC, and slow phase EPOC were analyzed by paired t-tests and p < .05 was considered statistically significant. HR, RER, VO_2 and lactate were compared initially through two-way (treatment × time) ANOVA with repeated measures. Result: No significant difference in HR and RER. However, the interaction effect of treatment and time on VO_2 was statistically significant (F = 7.68, p = .028). VO_2 was significantly increased at 25 (5.50 ± 0.36 ml/kg/min), 55 (5.17 ± 0.21 ml/kg/min) and 85 min (5.36 ± 0.23 ml/kg/min) than before (4.35 ± 0.19 ml/kg/min) (p = .004, p = .032, p = .010) supplementation in caffeine trail. Fast phase of EPOC in caffeine trail was significantly higher than placebo (750.86 ± 91.39 ml vs. 600.27 ± 72.19 ml, p = .043). Conclusion: Ingestion of caffeine 250 mg could increase the ratio of rest metabolism, as well as after middle-high intensity interval exercise. |
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