The depletion of liver glycogen stores will depend on the duration and
intensity of the exercise or your body’s movement. Glycogen stores will last 90
minutes if you just have low intensity exercise like distance running but if
your body works hard with intense body movement, then the glycogen will be
depleted for approximately 20 minutes. Moreover, if you just have the regular routine
in your day without any stressful exercise, then the glycogen stores will be
depleted in approximately 18 hours.