PDF(Pubmed)
Abstract：
The main purpose of this study was to investigate the effect of a novel alginate-encapsulated carbohydrate-protein (CHO-PRO ratio 2:1) supplement (ALG) on cycling performance. The ALG, designed to control the release of nutrients, was compared to an isocaloric carbohydrate-only control (CON). Alginate encapsulation of CHOs has the potential to reduce the risk of carious lesions.
METHODS: In a randomised cross-over clinical trial, 14 men completed a preliminary test over 2 experimental days separated by ~6 days. An experimental day consisted of an exercise bout (EX1) of cycling until exhaustion at W~73%, followed by 5 h of recovery and a subsequent time-to-exhaustion (TTE) performance test at W~65%. Subjects ingested either ALG (0.8 g CHO/kg/hr + 0.4 g PRO/kg/hr) or CON (1.2 g CHO/kg/hr) during the first 2 h of recovery.
RESULTS: Participants cycled on average 75.2 ± 5.9 min during EX1. Levels of plasma branched-chain amino acids decreased significantly after EX1, and increased significantly with the intake of ALG during the recovery period. During recovery, a significantly higher plasma insulin and glucose response was observed after intake of CON compared to ALG. Intake of ALG increased plasma glucagon, free fatty acids, and glycerol significantly. No differences were found in the TTE between the supplements (p = 0.13) nor in the pH of the subjects\' saliva.
CONCLUSIONS: During the ALG supplement, plasma amino acids remained elevated during the recovery. Despite the 1/3 less CHO intake with ALG compared to CON, the TTE performance was similar after intake of either supplement.
METHODS: In a randomised cross-over clinical trial, 14 men completed a preliminary test over 2 experimental days separated by ~6 days. An experimental day consisted of an exercise bout (EX1) of cycling until exhaustion at W~73%, followed by 5 h of recovery and a subsequent time-to-exhaustion (TTE) performance test at W~65%. Subjects ingested either ALG (0.8 g CHO/kg/hr + 0.4 g PRO/kg/hr) or CON (1.2 g CHO/kg/hr) during the first 2 h of recovery.
RESULTS: Participants cycled on average 75.2 ± 5.9 min during EX1. Levels of plasma branched-chain amino acids decreased significantly after EX1, and increased significantly with the intake of ALG during the recovery period. During recovery, a significantly higher plasma insulin and glucose response was observed after intake of CON compared to ALG. Intake of ALG increased plasma glucagon, free fatty acids, and glycerol significantly. No differences were found in the TTE between the supplements (p = 0.13) nor in the pH of the subjects\' saliva.
CONCLUSIONS: During the ALG supplement, plasma amino acids remained elevated during the recovery. Despite the 1/3 less CHO intake with ALG compared to CON, the TTE performance was similar after intake of either supplement.
摘要：
这项研究的主要目的是研究新型藻酸盐包封的碳水化合物-蛋白质（CHO-PRO比例2：1）补充剂（ALG）对循环性能的影响。ALG,用来控制营养的释放，与等热量仅碳水化合物对照(CON)进行比较。CHOs的藻酸盐封装具有降低龋齿病变风险的潜力。
方法：在一项随机交叉临床试验中，14名男子完成了为期2天的初步试验，分离为~6天。一个实验日包括骑自行车的运动回合（EX1），直到W〜73％时精疲力竭，随后进行5小时的恢复和随后的W~65%的耗尽时间(TTE)性能测试。受试者在恢复的前2小时内摄入ALG（0.8gCHO/kg/hr+0.4gPRO/kg/hr）或CON（1.2gCHO/kg/hr）。
结果：参与者在EX1期间平均循环75.2±5.9分钟。EX1后血浆支链氨基酸水平显着降低，在恢复期随着ALG的摄入显着增加。在恢复期间,与ALG相比,摄入CON后观察到显著更高的血浆胰岛素和葡萄糖反应.摄入ALG增加血浆胰高血糖素，游离脂肪酸,和甘油显著。在补充剂之间的TTE（p=0.13）和受试者唾液的pH值均未发现差异。
结论：在ALG补充期间，血浆氨基酸在恢复期间保持升高。尽管与CON相比，ALG的CHO摄入量减少了1/3，摄入两种补充剂后的TTE表现相似.
方法：在一项随机交叉临床试验中，14名男子完成了为期2天的初步试验，分离为~6天。一个实验日包括骑自行车的运动回合（EX1），直到W〜73％时精疲力竭，随后进行5小时的恢复和随后的W~65%的耗尽时间(TTE)性能测试。受试者在恢复的前2小时内摄入ALG（0.8gCHO/kg/hr+0.4gPRO/kg/hr）或CON（1.2gCHO/kg/hr）。
结果：参与者在EX1期间平均循环75.2±5.9分钟。EX1后血浆支链氨基酸水平显着降低，在恢复期随着ALG的摄入显着增加。在恢复期间,与ALG相比,摄入CON后观察到显著更高的血浆胰岛素和葡萄糖反应.摄入ALG增加血浆胰高血糖素，游离脂肪酸,和甘油显著。在补充剂之间的TTE（p=0.13）和受试者唾液的pH值均未发现差异。
结论：在ALG补充期间，血浆氨基酸在恢复期间保持升高。尽管与CON相比，ALG的CHO摄入量减少了1/3，摄入两种补充剂后的TTE表现相似.
