LEGEND: Language: Focus - Exercise 1
Is muscle glycogen metabolism affected by fitness?
Glycogen, a polymer of glucose, is stored in muscles as a ready source
of fuel during exercise. This study investigates the relationship between
fitness and the rate of muscle glycogen consumption during exercise.
Study Design: Eight subjects (19-22 years), 4 male
and 4 female, with varying levels of fitness were chosen. Fitness levels
were assessed by measuring the O2 consumption during a 5 min period of
maximum sustainable exercise. Subjects then cycled for 2 h; muscle biopsies
were taken at 30 min intervals during the exercise period.
