Publication:

運動恢復期共軛亞麻油酸補充對後續運動表現的影響

共軛亞麻油酸是一群存在於自然界中含有兩個共軛雙鍵的不飽合脂肪酸，具有影響脂質代謝，促進脂肪氧化的功能。本研究目的在於探討單次60分鐘的70% VO2 peak腳踏車運動後，立即給予碳水化合物與共軛亞麻油酸補充，對後續運動表現之影響。八名男性健康受試者分別接受兩次試驗處理，實驗以隨機、交叉試驗設計方式進行，每次試驗間隔至少七天。每次試驗為運動後立即給予碳水化合物並配合共軛亞麻油酸補充或安慰劑補充，觀察運動後恢復期3小時內的血液反應、氣體分析與後續的運動表現。結果顯示兩次試驗之間的運動表現無顯著差異（運動表現測試：CLA試驗 37.3 ± 3.1分鐘；Placebo試驗38.4 ± 1.8分鐘，p > .05），而且血漿中的葡萄糖、胰島素、游離脂肪酸與甘油濃度，和呼吸交換率、碳水化合物氧化速率與脂肪氧化速率皆無顯著差異。研究結論：對有規律運動習慣，非運動選手的健康男性，單次60分鐘、70% VO2 peak運動後，立即補充碳水化合物與共軛亞麻油酸，無法有效地提升3小時後緊接而來的後續耐力運動表現。

Conjugated linoleic acid （CLA） is refer to a group of polyunsaturated fatty acid with two double bonds. The present study was to determine the effect of CLA supplementation on subsequent endurance exercise performance after 3 hours of post-exercise recovery. Eight healthy male subjects （aged 22.25 ± 0.73 years） completed a double-blind, crossover trials after 60-mins cycling exercise at 70% VO2 peak oxygen consumption separately by 7 days. They consumed 4.0 g CLA supplementation or placebo with a carbohydrate meal for a 3 hrs recovery following exercise. The subsequent endurance exercise performances （CLA trial 37.3 ± 3.1 mins；Placebo trial 38.4 ± 1.8 trial, p > .05） were no significant improving after CLA supplementation for a 3 hrs recovery following exercise. No differences were found in circulating glucose, insulin, non-esterify fatty acid and glycerol concentrations with CLA supplement compared to placebo supplement. And no differences were found in respiratory exchange ratio, carbohydrate oxidation rate and fat oxidation rate. Therefore, the present study demonstrated that post-exercise oral CLA supplementation could not enhance the subsequent endurance exercise performance in health, untrained, regularly exercising male.