👉 Hemoconcentration is a measure of how much oxygen in a person's blood is being used up by their body. It is often used to compare the efficiency of different forms of exercise or physical activity, such as running or cycling. Hemoconcentration can be calculated using various formulas depending on the type of exercise and other factors, but it is generally expressed in milligrams per deciliter (mg/dL) or micromoles per liter (μmol/L).