Dear patient
I understand you’re worried 🤍 Let me explain this calmly.
First, LDH (Lactate Dehydrogenase) is an enzyme present in many tissues —
liver, heart, muscles, blood cells.
A mildly high LDH alone is usually NOT serious, especially if:
You did hill climbing / brisk morning walk just 2 hours before the test
You were fasting
Other
LFT parameters (SGOT/AST, SGPT/ALT, bilirubin, ALP) are normal
👉 Exercise can temporarily increase LDH, especially after muscle strain or climbing. Muscle activity releases LDH into blood.
When is high LDH concerning?
It becomes concerning if:
It is very high (2–3 times upper limit)
Liver enzymes (AST/ALT) are also high
You have symptoms like:
Persistent fever
Severe weakness
Yellow eyes (jaundice)
Unexplained weight loss
Important question for you:
Are your AST, ALT, bilirubin normal?
If yes → Most likely this is exercise-related temporary elevation.
What I suggest:
Don’t panic.
Repeat LDH after 3–5 days
No heavy exercise 48 hrs before test
Normal routine
Stay hydrated.