Aldolase is an enzyme found especially in the liver and skeletal muscles. When the liver or muscles are damaged, the cells release their contents (including aldolase) into the bloodstream. Since muscle weakness can be caused by problems with either the nerves or the muscles, this test identifies weakness caused by muscular problems.
Creatine Kinase (also known as CK, or Creatine Phosphokinase [CPK]) is an important diagnostic blood test for myopathies. CK is a type of protein called an enzyme that is especially active in skeletal muscle, heart tissue, and the brain. When muscle tissue is damaged, the cells release their contents into the bloodstream, causing elevated CK levels in the blood
Sedimentation Rate (also called erythrocyte sedimentation rate [ESR] or sed rate) measures swelling and inflammation of the muscles. Doctors use the sed rate to watch the progress of the muscle inflammation. This test is not specific to a particular disease but simply identifies the presence and severity of the inflammation.