Julie, thank you for your reply. My retest was just a shade above normal and the test included cardiac and skeletal muscle fractions this time and it was all skeletal; I had played a three match tennis tournament over the weekend prior and no doubt that was the reason for the slight elevation. The previously extremely high reading was, I think a lab error. My doctor had, however, induced a little paranoia by mentining several insidious rheumotologic disorders as possible causes of elevated cpk. I must repeat that I was astounded that my lipids were so favorable after a couple of weeks of 20 grams or less of carbs and lots of eggs, meat and fat!!! The hdl to total cholesterol ratio was 3.0! As another list member pinted out, my slightly high triglycerides (115) may have been due to fat metabolism since I had lost several pounds in the prior two weeks. Rick Julie Jarvis RPA-C wrote: > > A side note re the blood work; my cpk (creatine kinase was 955 which > > is several times normal; this is a muscle enzyme > > > Yes, the exercise alone can sure cause rises in CPK like that. Please let us > know your new results. > > Julie Jarvis > Physician Assistant