At what point does carbon dioxide buildup become dangerous during heavy exercise?

Carbon dioxide buildup becomes dangerous when exertion is high and oxygen is scarce because this scenario leads to an imbalance in the body's respiratory process. During intense physical activity, muscles produce more carbon dioxide as a waste product of metabolism. If the body is unable to effectively expel this excess carbon dioxide due to increased exertion and insufficient oxygen supply, it can result in respiratory acidosis. This condition can impair bodily functions and lead to symptoms such as headaches, dizziness, and shortness of breath, which can significantly compromise performance and physical safety. Additionally, when oxygen levels are low in tandem with high carbon dioxide levels, it can lead to hypoxia, further exacerbating the dangerous effects of this buildup. Understanding the relationship between exercise intensity, oxygen availability, and carbon dioxide levels is crucial for maintaining safety during strenuous activities.