Because neither of these systems requires oxygen to produce energy
Psychologically basketball requires energy from the aerobic and anaerobic energy systems. This combination of energy requirements is often refered to as an intergration of energy systems on a continuum over time.
Anaerobic
In Anaerobic exercise
Aerobic exercise is exercise with oxygen, in other words, exercise that gets you breathing hard by utilizing your cardiovascular system. Running, jogging, swimming, and walking are examples of aerobic exercise. Anaerobic exercise is exercise without oxygen, in other words, exercise that does not get you breathing hard. Doing a single squat or bench press are examples of anaerobic exercise. Actually, every exercise is at least slightly aerobic or slightly anaerobic. Also, many anaerobic exercises can be made aerobic simply by doing more of them, for example, doing 50 bench presses or squats without pausing.
Anaerobic
Chemical energy. The currency of metabolism is adenosine triphosphate (ATP) which is responsible for all human muscular mechanical activity. However, the type of energy is very simply "chemical".
anaerobic exercise is an exercise whereby an an individual is active in the absence of oxygen.
Anaerobic exercise uses about 10 times more energy than aerobic exercise, and you have more "fuel" available for aerobic exercise. Anaerobic exercise also produces lactic acid, which is what causes your muscles to burn.
anaerobic metabolism system
In aerobic exercise, the energy used comes primarily from aerobic metabolic processes which use oxygen to process the "fuel" being metabolized. This is in contrast to anaerobic exercise where the energy used comes primarily from metabolic processes that do not require separate oxygen.
Aerobic Metabolism is the pathway used for exercise
protein