High CPK means that you have muscle that is being destroyed and this is due to the excercise that you are doing. when the muscle get detroyed (rhabdomyolysis) it is excreted (go out of the body) through the kidneys. The creatinine is one of the tests of the kidney and it shows that you have a lot of muscle pieces that went to the kidney to be excreted.
I suggest that the test be repeated but after you stop exercise for few days before the control because CPK is high and to be reassured.
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It is recommended that all individuals see a Family Doctor for a full medical examination annually. Adults should get their blood pressure checked (US Preventive Task Force), a flu vaccine (CDC) and more each year.