Why Is There Blood in Urine After Running?

Many readers are interested in the right subject: why is there blood in the urine after running? Our makers are pleased to see that we have already researched current studies on this fascinating subject. We will give you a wide range of answers based on the latest medical reports, advanced research papers, and sample survey information. Keep repeating to find out more.

All long distance runners are obligated to monitor their urine production. Urine production provides a good picture of the body’s water management and it is very important to keep it under control when very hot. Marathon runners and athletes are familiar with the precedent that urine can be very concentrated when urinating after a long session of running or exercise. Sometimes. there can become blood in it.


The presence of blood in the urine after a run may be related to almost any cause.

1. its effect on the bladder wall

The scientific term for blood in urine is hematuria. The most common cause of hematuria after running is its effect on the bladder wall. The bladder wall contains numerous blood vessels that experience free during running, especially in an empty bladder, there The bladder wall is affected. Repeated force on the bladder wall during running may be necessary to damage blood vessels, and this damage can lead to bleeding. If you notice blood in your urine after a prolonged run, do not empty your bladder for the session. If urine is present in the bladder while running, the possibility of injury is small.

The extent of internal damage can be seen with a cystoscope and may take several days to fully heal.

2. changes in the permeability of the filtering system

Another major cause of blood in the urine after a run may be caused by the permeability of the renal tubules. The kidneys are composed of thousands of microscopic filters or tubules. Under normal circumstances, their membranes do not shed blood. However, after running or intensive exercise, their permeability may increase, allowing some red blood cells to pass along with the filtered urine. This can lead to hematuria. This condition is temporary and is allowed after the effort has ceased.

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3. increased vulnerability of red blood cells

The scar red color of blood is caused by the presence of hemoglobin. Under normal living conditions, hemoglobin is found in red blood cells. If for some reason the red blood cells are damaged, hemoglobin is released into the blood. This hemoglobin is filtered by the kidneys and can cause a reddish discoloration to the urine. Some people have more fragile red blood cells than others, but during running the increased fragility can damage the red blood cells. This is known as hemoglobinuria or lysis.

Four Other Causes

Running is not considered the only cause of hematuria. The presence of blood in the urine after running can be associated with almost any other cause. If you notice the presence of blood in your urine, you should consult your physician regarding the correct diagnosis and treatment. Some common causes:

  • UTI or urinary tract infection: Urinary tract infections are a fairly common cause of microscopic hematuria in the elderly. Bacteria can penetrate the urinary tract via the urethra and begin to multiply. Symptoms include a burning sensation or pain when urinating, soiled urine that burns, or a constant urge to pee.
  • Kidney stones: kidney or bladder stones can cause hematuria. These stones occur when certain minerals concentrate and crystallize in the kidney or bladder wall. Over time, these tiny crystals have every chance to freeze into huge stones. They may not make a sound for long. Causing obstruction of the urinary tract can lead to severe pain and bleeding noted as the presence of blood in the urine.
  • Enlargement of the prostate: the prostate is due to the bladder and surrounds the large lobe or urethra in the upper part of the man. As the prostate enlarges, it squeezes the urethra, making urination more difficult. Other symptoms of an enlarged prostate are a constant desire to pee and the presence of blood in the urine. Prostate infections can cause such symptoms.
  • Kidney disease: Inflammation of the filtration system or glomerulonephritis often causes hematuria. Glomerulonephritis may be part of a systemic disease or may affect only the kidneys. It can occur after a throat infection.
  • Cancer: the presence of honest blood in the urine can be a symptom of kidney, prostate, or bladder cancer. It occurs in advanced stages. and there It is usually not considered a symptom of other conditions in its early stages.
  • Hereditary disorders. People with certain inherited disorders are more likely to develop hematuria. These disorders include sickle cell anemia, in which red blood cells are simply damaged, and Alport syndrome, which affects the kidney filtration system.
  • Trauma: Damage to the kidneys can cause hematuria. A blow to the kidney will result in the appearance of blood in the urine.
  • Medications: Some medications, such as the chemotherapy drug cyclophosphamide and blood thinners, can cause hematuria.
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Is there any way to prevent this?

There is no absolute way to prevent hematuria after running. However, there this can be done if you notice blood in your urine after running. These precautions include, among other things, ingesting the correct amount of water and running with a partially full bladder. If you notice blood in the urine after intensive training. and there There are no accompanying symptoms. No need to worry.

When should I be concerned?

The presence of blood in the urine after a run is not considered abnormal, but if you notice it you must go to a doctor. If there If abdominal pain and fever become a nuisance, you probably have an infection that needs to be treated.

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Alex Koliada, PhD

Alex Koliada, PhD

Alex Koliada, PhD, is a well-known doctor. He is famous for his studies of ageing, genetics and other medical conditions. He works at the Institute of Food Biotechnology and Genomics NAS of Ukraine. His scientific researches are printed by the most reputable international magazines. Some of his works are: Differences in the gut Firmicutes to Bacteroidetes ratio across age groups in healthy Ukrainian population [BiomedCentral.com]; Mating status affects Drosophila lifespan, metabolism and antioxidant system [Science Direct]; Anise Hyssop Agastache foeniculum Increases Lifespan, Stress Resistance, and Metabolism by Affecting Free Radical Processes in Drosophila [Frontiersin].
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