<unk>  is the specific changes that the respiratory system undergoes in response to the demands of physical exertion. Intense physical exertion, such as that involved in fitness training, places elevated demands on the respiratory system. Over time, this results in respiratory changes as the system adapts to these requirements. These changes ultimately result in an increased exchange of oxygen and carbon dioxide, which is accompanied by an increase in metabolism.<unk>  is a physiological determinant of peak endurance performance, and in elite athletes, the pulmonary system is often a limiting factor to exercise under certain conditions.
Respiratory adaptation
Neural adaptation
Respiratory compensation
Neural facilitation
Sensory-motor coupling
Reproductive compensation
Starvation response
Somatosensory amplification