Early postexercise muscle glycogen recovery is enhanced with a carbohydrate-protein supplement
Early postexercise muscle glycogen recovery is enhanced with a carbohydrate-protein supplement
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DOI：
10.1152/japplphysiol.00394.2002
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发表时间：
2002-10-01
影响因子：
3.3
通讯作者：
Price, TB
中科院分区：
文献类型：
--
作者：
Ivy, JL;Goforth, HW;Price, TB
在本研究中，我们验证了一个假设，即与等量碳水化合物（LCHO）或热量当量（HCHO）的碳水化合物补充剂相比，碳水化合物-蛋白质（CHO-Pro）补充剂在运动后补充肌肉糖原方面更有效。经过2.5 +/- 0.1小时的高强度循环以消耗肌肉糖原储存后，受试者（n = 7）采用秩序设计，在运动后（10分钟）和运动后2小时立即补充CHO-Pro （80 g CHO, 28 g Pro， 6 g脂肪），LCHO （80 g CHO， 6 g脂肪）或HCHO （108 g CHO， 6 g脂肪）。运动前和恢复后4 h，定期用核磁共振波谱法测定股外侧肌糖原。运动显著降低了肌糖原储存（最终浓度：40.9 +/- 5.9 mmol/l CHO-Pro, 41.9 +/- 5.7 mmol/l HCHO, 40.7 +/- 5.0 mmol/l LCHO）。恢复240 min后，CHO-Pro组肌糖原（88.8 +/- 4.4 mmol/l）显著高于LCHO组（70.0 +/- 4.0 mmol/l, P = 0.004）和HCHO组（75.5 +/- 2.8 mmol/l, P = 0.013）。糖原储存量在LCHO和HCHO处理之间无显著差异。不同治疗组的血浆胰岛素反应无显著差异，但CHO-Pro治疗组的血糖水平明显降低。这些结果表明，在运动后，补充CHO- pro比补充相同CHO或卡路里含量的CHO更有效地快速补充肌糖原。
In the present study, we tested the hypothesis that a carbohydrate-protein (CHO-Pro) supplement would be more effective in the replenishment of muscle glycogen after exercise compared with a carbohydrate supplement of equal carbohydrate content (LCHO) or caloric equivalency (HCHO). After 2.5 +/- 0.1 h of intense cycling to deplete the muscle glycogen stores, subjects (n = 7) received, using a rank-ordered design, a CHO-Pro (80 g CHO, 28 g Pro, 6 g fat), LCHO (80 g CHO, 6 g fat), or HCHO (108 g CHO, 6 g fat) supplement immediately after exercise (10 min) and 2 h postexercise. Before exercise and during 4 h of recovery, muscle glycogen of the vastus lateralis was determined periodically by nuclear magnetic resonance spectroscopy. Exercise significantly reduced the muscle glycogen stores (final concentrations: 40.9 +/- 5.9 mmol/l CHO-Pro, 41.9 +/- 5.7 mmol/l HCHO, 40.7 +/- 5.0 mmol/l LCHO). After 240 min of recovery, muscle glycogen was significantly greater for the CHO-Pro treatment (88.8 +/- 4.4 mmol/l) when compared with the LCHO (70.0 +/- 4.0 mmol/l; P = 0.004) and HCHO (75.5 +/- 2.8 mmol/l; P = 0.013) treatments. Glycogen storage did not differ significantly between the LCHO and HCHO treatments. There were no significant differences in the plasma insulin responses among treatments, although plasma glucose was significantly lower during the CHO-Pro treatment. These results suggest that a CHO-Pro supplement is more effective for the rapid replenishment of muscle glycogen after exercise than a CHO supplement of equal CHO or caloric content.