Problem
Mary Ann is a 27 years old sedentary female who has decided to begin an aerobic training program for her health and fitness. Prior to beginning her training program, her VO2 max was 38ml/kg/min. after 6 months of regular running, swimming, and cycling her VO2 max had increased to 52ml/kg/min. Explain in detail the underlying mechanisms responsible for this significant increase in her VO2 max.