Skip to content

Fitness & Exercise

Font Size

Running Shoes: Hazardous to Your Joints?

Study Shows Running Shoes Exert More Stress on Knees and Hips Than Running Barefoot
By
WebMD Health News
Reviewed by Louise Chang, MD

Jan. 7, 2010 -- Compared to running barefoot, running in conventional running shoes increases stress on the knee joints up to 38%, according to a new study.

''There is an increase in joint torque that may be detrimental," says D. Casey Kerrigan, MD, the lead author of the study, published in PM&R: The Journal of Injury, Function and Rehabilitation.

Joint torque is a measure of how much a force causes the joint to rotate.

But Kerrigan is not advocating that runners take up barefoot running -- just that her findings may be a reason to redesign running shoes. Kerrigan, formerly chairwoman and professor of physical medicine and rehabilitation at the University of Virginia, Charlottesville, now heads JKM Technologies and is designing a running shoe.

At least one podiatric specialist calls the study finding ''much ado about nothing."

Running Shoes Study: Details

Kerrigan's team evaluated 68 runners -- 37 women, average age 31, and 31 men, average age 36 --   who ran at least 15 miles a week. None had any history of musculoskeletal injury.

Participants ran barefoot on a treadmill and then in a running shoe: the Brooks Adrenaline.

Kerrigan's team observed how each condition, barefoot and shod, affected the joints of the hip, knee, and ankle.

Compared to running barefoot, the researchers found running in running shoes increased stress on the lower extremities. They found a  54% increase in the hip internal rotation torque and a 36% to 38% increase in knee torque.  Is that increase mild, moderate, worrisome? "We don't know," Kerrigan tells WebMD. "We just know it's an increase."

She attributes the increased stress to the characteristic design of the majority of running shoes, including an elevated heel and increased material in the midsole arch.

Providing this cushioning in the heel, she suspects, counteracts the body's natural response to compensate for the torque associated with impact.

The increases found in her current study are higher than when she compared barefoot walking to walking in high heels. The high-heel shoes increased knee joint torque by 20% to 26%, she says.

Running Shoes Study: Analysis

Some torque on the knee is normal, of course. "What we are saying is, there is an increase over what would be experienced just walking around," Kerrigan says.

Her concern is that the excess stress may contribute to knee osteoarthritis, although the study did not look at a link between running shoes and injury or running shoes and the development of arthritis.

She isn't suggesting barefoot running -- a trend that's picked up steam in the past year or so -- is necessarily better than running in athletic shoes, she says.

Running Shoes Study: Other Opinions

''It's much ado about nothing," says Bruce Williams, DPM, past president of the American Academy of Podiatric Sports Medicine and a spokesman for the American Podiatric Medical Association, of the study results.

Healthy Living Tools

Ditch Those Inches

Set goals, tally calorie intake, track workouts and more, all via WebMD’s free Food & Fitness Planner.

Get Started

Today on WebMD

pilates instructor
15 moves that get results.
woman stretching before exercise
How and when to do it.
 
couple working out
Moves you can do at home.
woman exercising
Strengthen your core with these moves.
 
man exercising
Article
7 most effective exercises
Interactive
 
Man looking at watch before workout
Slideshow
Overweight man sitting on park bench
Video
 

Pollen counts, treatment tips, and more.

It's nothing to sneeze at.

Loading ...

Sending your email...

This feature is temporarily unavailable. Please try again later.

Thanks!

Now check your email account on your mobile phone to download your new app.

pilates instructor
Slideshow
jogger running among flowering plants
Video
 
woman walking
Article
Taylor Lautner
Article