https://www.medicalnewstoday.com/articles/319892.php

Nov 2, 2017 ... Low creatinine levels could indicate a problem with the muscles or liver but may be due to something less serious, such as reduced muscle ...

https://labtestsonline.org/tests/creatine-kinase-ck

Jul 24, 2016 ... Creatine kinase (CK) is an enzyme found in the heart, brain, and skeletal ... A CK blood test may be used to detect inflammation of muscles ... What does the test result mean? ... A low CK level may be seen in early pregnancy.

https://www.ncbi.nlm.nih.gov/pubmed/8730112

J Rheumatol. 1996 Apr;23(4):603-8. Low serum creatine kinase activity is associated with muscle weakness in patients with rheumatoid arthritis. Stucki G(1 ) ...

https://www.urmc.rochester.edu/encyclopedia/content.aspx?ContentTypeID=167&ContentID=creatine_kinase_blood

This test measures the amount of an enzyme called creatine kinase (CK) in your blood. ... If this test shows that your CK levels are high, you may have muscle or heart damage ... Ask your healthcare provider what your test results mean for you .

https://www.clinexprheumatol.org/article.asp?a=1531

females and 29 males, with a mean age of 36 years). ... Low serum CK levels (< 33. IU/L) were detected ... patients with normal serum CK levels, those with SLE ...

https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0156433

Jun 1, 2016 ... Background Serum creatine kinase (sCK) reflects CK activity from striated skeletal muscle. ... Conclusion A low level of sCK is associated with an increased risk of death ... Evidence indicates that sCK reflects muscular mass.

https://www.mda.org/quest/article/simply-stated-the-creatine-kinase-test

Jan 31, 2000 ... Because elevated CK levels indicate muscle damage, many parents wonder why their children with Duchenne muscular dystrophy (DMD) had ...

https://www.mda.org/disease/distal-myopathies/diagnosis

CK stands for creatine kinase, an enzyme that leaks out of damaged muscle. When elevated CK levels are found in a blood sample, it usually means muscle is  ...

https://www.healthline.com/health/low-creatinine

May 3, 2017 ... The symptoms that go with low creatinine levels depend on the ... However, this doesn't always mean there's a serious medical problem.

https://www.myositis.org/about-myositis/diagnosis/blood-tests/

If the CK test indicates muscle damage, more tests will be needed to find ... in advanced disease, serum muscle enzyme levels can be persistently low in the ...