補充精氨酸對頂尖跆拳道選手運動表現與nitric oxide的影響

研究顯示 L-精胺酸，尿素循環的中間產物之一，可能可以促進運動表現。本研究探討口服補充精胺酸對 5分鐘間歇運動期間最大功率與疲勞產生的影響，以頂尖男性柔道選手為研究對象。運動後血漿氨與乳酸濃度的增加幅度在精胺酸與安慰劑組無顯著差異，與安慰劑組相比較，精胺酸組在第 3、13、14、15 階段的功率輸出下降比例較低，疲勞指數改變比例精胺酸 組在第 1、3 階段較安慰劑組顯著為低。本研究顯示，口服精胺酸補充劑可減緩男性頂尖柔道選手在 5 分鐘間歇划船器運動測試末期的功率消退，可能有助於提升柔道選手運動表現，但機轉可能與血漿乳酸與氨的移除無關。
It has been shown that L-arginine, an intermediate of urea cycle, could increase exercise performance. The objectives of this study are to investigate the effect of oral arginine supplementation on peak power and development of fatigue in a 5-min intermittent rowing test in elite judo athletes. The exercise-induced changes of lactate and ammonia were similar in arginine and placebo groups. The decline in power output was smaller in arginine group, compared to placebo, in the 3rd, 13th, 14th, and last stages. The change of fatigue index was smaller in the arginine group than the control at the first and 3rd stages. This study suggested that acute oral supplementation of arginine could delay fatigue and enhance power output in an intermittent rowing test in male judo athletes. The mechanism is independent from metabolism of lactate and ammonia.