4 Your Health: Marathons are not good for the kidneys and knee r - KVOA | KVOA.com | Tucson, Arizona

4 Your Health: Marathons are not good for the kidneys and knee replacements a step short

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Tucson- Knee replacement surgeries in the U.S. have doubled in recent years but the benefits may not be worth the cost for patients with milder symptoms.

A new study found most people reported a higher quality of life after knee replacement surgery but the change was minimal. The outcomes, however, were much better for patients who had severe knee pain before the procedure.

Kidney damage

Running a marathon may cause short term injury to the kidneys.

Yale scientists compared blood and urine samples of runners from before and after completing a marathon.

Right after the race, 82 percent had stage one acute kidney injury, which is when the kidneys fail to filter waste from the blood.

Although the condition cleared up within two days, experts say it's not clear if repeated marathons may cause long term damage.

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