Disturbances in BCAA Metabolism and the Effects of Feeding and Exercise in COPD

In this study we investigate whether milk based protein sources of BCAA (casein and whey proteins) are superior to soy protein in the stimulation of protein anabolism before, during and after cycle exercise in COPD and healthy elderly and young subjects, and whether adding BCAA to soy protein will increase protein anabolism in these subjects. To investigate Leucine, Isoleucine and Valine metabolism during and after exercise in COPD and healthy subjects