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Internal Bruises on the Inner Knee From Running

by
author image Greg Cooper, D.C.
Greg Cooper began writing in 2007 with his book "The Reasonable Radical." He completed undergraduate work at West Virginia University and received his Doctor of Chiropractic from Sherman College. Cooper taught spinal manipulation in orthopedic hospitals in China and was part of a sports medicine team for the 1992 Olympic trials.
Internal Bruises on the Inner Knee From Running
Running on uneven terrain is more challenging and may affect your stride. Photo Credit Jupiterimages/BananaStock/Getty Images

The discoloration seen under the skin with a bruise is due to damage to tiny blood vessels and blood leaking out of the vessel and into the surrounding tissue. It occurs when those vessels are damaged or broken by a blow to the skin. If this is occurring when you are running, you are probably striking your knees together. Several conditions may cause that kind of contact.

Changes in Terrain

Uneven terrain, like trail running or even the slope of the beach, can be the culprit. These surfaces require better balance and can result in your legs moving in more erratic patterns; occasionally, stride imbalances lead to knees coming into contact with each other. Sometimes the internal bruising may be due to a single hit of one knee against the other. Other times, it may be an accumulation of small contacts over the course of your run.

Changes in Shoes

Running shoes more than a year old or that have logged more than 400 miles need to be replaced. Your shoes may wear even faster if you are a larger runner. Running shoes provide not only shock absorption but help to control supination and pronation, two conditions that create abnormal movement in your feet and translate up to your knees. If you have one of these control problems, you may be striking your knees as your body compensates.

Changes in Stride or Gait

You may have altered your gait, if you have recently made a change in the way you run. Your gait is the pattern of movement of your legs as you run. If you have been a heel-toe runner and have changed to land more on the ball of your foot or your toes, you may have also changed your gait and caused your knees to come into contact with one another. Adopting a longer or shorter stride could be another factor contributing to knee bruising.

Managing and Preventing Knee Bruises

If you have knee bruises, you should treat them with ice packs or cold compresses. Wrap the ice in a towel and apply directly to the skin for about 10 minutes. The ice will reduce the blood flow to the area and limit the extent of the bruise and also reduce inflammation. Paying close attention to your gait while you run should reveal the point in your run when your knees contact each other and you can modify your gait accordingly.

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