Mark Kretschmann(@mark_k):Went for routine blood work after going hard at the gym. The next day, my doctor called about elevated "CK" (creatine kinase) levels! Turns out creatine kinase can spike after a hardcore workout. Muscle stress and damage can show up in your blood work. Worth mentioning that gym session to your doctor. 😏

Mark Kretschmann

@mark_k

SI (AI) & tech news from a software engineer's perspective. Coding, Omarchy Linux, open source & e/acc. More building, less doom.

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Mark Kretschmann@mark_k

2026.09.18 07:42

Went for routine blood work after going hard at the gym. The next day, my doctor called about elevated "CK" (creatine kinase) levels! Turns out creatine kinase can spike after a hardcore workout. Muscle stress and damage can show up in your blood work. Worth mentioning that gym session to your doctor. 😏