NYPD cop who sifted through ten tons of 9/11 debris says he saw a ghost 'trying to help' while searching for clues to identify victims from attacks at landfill, book reveals. 1  Sgt. Frank Marra, 48, said he saw ghost of African American woman, who was dressed in white as a Red Cross worker from Second World War.
oxygen debt. a state that arises in very active muscles when insufficient oxygen is supplied by the lungs, causing the muscle tissue to respire anaerobically with the production of LACTIC ACID. When muscular activities slow down, the rate and depth of breathing remains at a high level until the lactic acid has been oxidized.
What Is Oxygen Debt after Exercise? When you exercise, your body uses a lot of oxygen. This is one of the reasons that you breathe so heavily during exercise. Because so many of your muscles are working together during a workout, your body needs to transport oxygen to all of them to make sure that they can continue to move properly.