Limited Improvement. The average person’s lung capacity can be improved only 5 percent to 15 percent even with frequent intense aerobic workouts, according to Noakes. Everyone is born with a specific maximum lung capacity, called VO2 Max, which refers to the rate of oxygen flow.When your heart rate increases during aerobic exercise, your oxygen consumption increases: this provides the necessary energy to your muscles for the strenuous activity.imited Improvement. The average person’s lung capacity can be improved only 5 percent to 15 percent even with frequent intense aerobic workouts, according to Noakes. Everyone is born with a specific maximum lung capacity, called VO2 Max, which refers to the rate of oxygen flow.