A complete blood count (CBC) gives important information about the kinds and numbers of cells in the blood, especially red blood cells, white blood cells, and platelets. A CBC helps your doctor check any symptoms, such as weakness, fatigue, or bruising, you may have. This test measures the amount of space (volume) red blood cells take up in the blood. 2  The value is given as a percentage of red blood cells in a volume of blood. 3  For example, a hematocrit of 38 means that 38% of the blood's volume is made of red blood cells.
At a typical cycling or running ârace paceâ, carbohydrate utilization is in the range of 2-3g/minute. Thus it is crucial to have a good glycogen stores as well as to have the proper carbohydrate intake during exercises lasting more than 2 hours.
It's gone out of favor with most athletes. You don't need it if you eat enough carbs while you're training. You should only consider carb loading if you're doing very hard, continuous exercise for 90 minutes or more, and you're working with a sports dietitian.