What is it you want me to help with
Creatine kinase (CK) is an enzyme found in the heart, brain, skeletal muscle, and other tissues. Increased amounts of CK are released into the blood when there is muscle damage. This test measures the amount of creatine kinase in the blood.
The liquid part of the blood which carries red blood cells, white blood cells,and platelets is called plasma
Marathon race would not be considered as a team sport.