For mice, too much muscle glycogen impairs endurance exercise performance

(Cell Press) The basics of glycogen biology are thought to be well established, but a study in rodents published July 5 in the journal Cell Metabolism turns long-standing assumptions on their head. Surprisingly, the researchers found that glycogen synthesis does not require a protein called glycogenin, and that high glycogen levels actually impair endurance muscle performance in mice.

from EurekAlert! - Social and Behavioral Science http://ift.tt/2thj1Um