The patient reports that he exercises at the local gym 7 days a week for a minimum of 60 minutes each day. He reports that he is able to lift weights up to 100 lb. An elevation of which enzyme may indicate muscle injury secondary to strenuous exercise?

Question

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Creatinine phosphokinase (CPK) is an enzyme that can be elevated in the blood following muscle injury, including injury from strenuous exercise. It is often used as a marker for muscle damage.

The Patient Reports That He Exercises at the Local Gym