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A 24-year-old female asked:

I have brown urine. drinking lots of water. weightlifting 3 times a week. what could this be? increased dark urine after i exercise.

3 doctor answers6 doctors weighed in
Dr. Matt Wachsman
Internal Medicine 37 years experience
UHOH: muscle breakdown shows up as brown urine. This is incredibly dangerous and needs immediate treatment. cannot say in your particular case, but generally,
Dr. Matthew Cahill
Internal Medicine 26 years experience
Probably myoglobinur: Many possible explanations here, including supplements that discolor urine, other causes of renal injury, dehydration, bleeding in kidney OR increased muscle breakdown and excretion in urine. Only the first would be trivial. You need to stop exercising and get your renal function and urine analysed by a doctor to be sure. The best thing you are doing is hydrating...keep that up. Get well
Dr. Robert Grieco
Family Medicine 38 years experience
Muscle injury: The dark urine is a sure sign that you are over doing your workouts. When you push it too far you kill some muscle which is called rhabdomyolysis. Take it a bit slower.

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Last updated Mar 18, 2019

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