Could post-workout brown urine mean mild rhabdomyolysis?

Question

Hi doctor,

I did intense upper-body workouts after a long break. Three days later, I developed muscle soreness, mainly in my chest and triceps. My urine turned brownish but improved to mostly clear with hydration. I have no swelling, normal urine output, no nausea or dizziness, and the soreness is getting better. I live in a country with limited and unreliable medical facilities, so I cannot easily access a hospital; otherwise, I would have gone. Could this be mild rhabdomyolysis, and do I still need hospital tests or treatment?

Please guide.

Thank you.

Answer 1

Hi,

Welcome to icliniq.com.

I read your query and understand your concerns.

It is possible you had a mild form of exertional rhabdomyolysis. The brown urine after intense exercise suggests some muscle breakdown with myoglobin release. The fact that your urine is now mostly clear, your output is normal, there is no swelling, and your soreness is improving are reassuring signs.

However, rhabdomyolysis can sometimes strain the kidneys, so ideally, a simple urine dipstick and blood tests for kidney function and CK (creatine kinase) levels would confirm recovery. Since access to reliable care is limited, you should:

Continue aggressive oral hydration for the next several days (water plus oral rehydration salts if available).
Avoid further strenuous exercise until you are completely pain-free.
Monitor urine color and output closely if it becomes dark again, output decreases, or you develop swelling, nausea, vomiting, confusion, or reduced urination. Seek medical care immediately.

Given your improving trend and no warning signs, urgent hospital admission may not be necessary right now, but a check-up within the next week would still be wise if possible.

I hope this answers your query. Feel free to reach out anytime.

Thank you.