Several physiological changes occur, including alterations in blood gases. Here are some key points:

1. Oxygen and Carbon Dioxide Levels: During exercise, the working muscles require more oxygen, and carbon dioxide production increases. As a result, there is an increase in oxygen consumption (VO2) and carbon dioxide production (VCO2). This leads to changes in arterial blood gases, such as a decrease in arterial oxygen tension (PaO2) and an increase in arterial carbon dioxide tension (PaCO2).

2. Acid-Base Balance:

3. Ventilation:

Good luck

Perhaps some information:

TIBES, U., HEMMER, B., SCHWEIGART, U., BÖNING, D., FOTESCU,

D.: Exercise acidosis as cause of electrolyte changes in femoral

venous blood of trained and untrained man. Pflügers Arch 347:

145-158 (1974)

TIBES, U., HEMMER, B., BÖNING, D.: Heart rate and ventilation in relation to venous [K+], osmolality, pH, PCO2, PO2, [Orthophosphate], and [Lactate] at

transition from rest to exercise in athletes and nonathletes. Eur J Appl Physiol 36: 127-140 (1977)

Note that the question is about venous blood gases, not arterial blood gases. Did you really mean that? Venous blood gases tend to be heterogeneous throughout the body depending on which muscles are active. Sampling of central venous blood gases is not commonly done unless you are in a clinical setting.