Saturation I think not 100% sure sorry
Carbon dioxide is transported in the blood in three ways: (i) dissolved in solution; (ii) buffered with water as carbonic acid; (iii) bound to proteins, particularly haemoglobin. Source: https://academic.oup.com/bjaed/article/5/6/207/331369
Athletes need a lot of protein and it is unhealthy for a athlete to become vegetarian Bc they don’t have anything to burn off during the sport
