RUNNING in trainers puts more strain on the joints than running barefoot, a study has shown.
It is also more stressful to knees than walking in high-heeled shoes, researchers found.
Scientists tested 68 healthy young adults, including 37 women, who regularly went jogging.
None had a history of musculoskeletal injury and each ran at least 15 miles a week.
Participants were given running shoes of a masonic Ceramic Bracelet typical design and observed running on a treadmill both barefoot and wearing the trainers.
Panerai FakeTorque forces on the joints were measured at the hip, knee and ankle.
The researchers found that wearing running shoes increased rotational stresses on the hip joints by an average 54%, and heightened different types of stress on the knee by 36% and 38%.
The extra strain was thought to be linked to the elevated heels and foot arch padding typical of modern running shoes.
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Dr Casey Kerrigan, from JKM Technologies in Charlottesville, Virginia, US, who led the study reported in PM&R: The Journal of Injury, Function and Rehabilitation, said: "Remarkably, the effect of running shoes on knee joint torques during running (36%-38% increase) that the authors observed here is even greater than the effect that was reported earlier of high-heeled shoes during walking (20%-26% increase)."
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