Good Thought From "The Scientific American":
Significance
Your body does not have an infinite supply of
glycogen. If your glycogen levels are too low to supply the energy needs of your
muscles, your body will resort to breaking down cellular tissue. Glycogen
depletion causes an intensity of muscle fatigue that increases your risk of
injury, as fatigued muscles do not protect joints as well as muscles in a normal
state. Also, glycogen depletion hampers the immune system. Glycogen depletion
can happen as a result of intermittent, as well as continuous,
exercise.
Overtraining
Strenuous exercise causes small tears in
muscle tissue. During rest periods between workouts, your body works to repair
stressed muscles by restoring glycogen and enzymes and strengthening blood
vessels, writes Mark Jenkins, M.D. Without adequate rest, your performance will
level off or even decline. In serious cases of overtraining, athletes have
become afflicted with symptoms such as fatigue, depression and elevated stress
hormone levels. Also, low glycogen levels can cause symptoms of hypoglycemia to
manifest during a workout.
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