Final answer:
A greater aerobic scope under un-stressful conditions allows the organism to invest into glucose circulating in the bloodstream, pyruvic acid, and fatty acids. Aerobic respiration is much more efficient than anaerobic glycolysis, producing approximately 36 ATPs per molecule of glucose versus four from glycolysis. Aerobic training increases the efficiency of the circulatory system, allowing for a steady supply of oxygen (O2) to the muscles for longer periods of time.
Step-by-step explanation:
A greater aerobic scope under un-stressful conditions allows the organism to invest into glucose circulating in the bloodstream, pyruvic acid, and fatty acids. Aerobic respiration, which takes place in mitochondria, is much more efficient than anaerobic glycolysis, producing approximately 36 ATPs per molecule of glucose versus four from glycolysis. Aerobic training increases the efficiency of the circulatory system, allowing for a steady supply of oxygen (O2) to the muscles for longer periods of time.