Physical exercise or strenuous sporting activities can increase blood creatine kinase (CK) levels—something to bear in mind in patients with suspected statin-associated muscle symptoms.

How long do CK levels stay elevated after exercise?

After a muscle is injured, it takes a certain amount of time for CK levels to return to normal. They should decrease by half every 36 hours. For example, a level that is 100 times higher (about 15,000 U/L) will take 10 days or so to return to normal.

Can I workout with high CK levels?

There is also correlation between CK level and injury; for instance, if you have high levels of CK and continue to exercise, you will increase your risk of injury, cramps, and fatigue.