Jaime Andres Nicacio, a physician specializing in physical medicine and rehabilitation at Southwest Washington Medical Center, said education and caution are key to running without traditional shoes.
It is crucial that barefoot and minimalist runners modify their form to strike with their forefoot instead of their heels, Nicacio said.
Otherwise, they might increase their risk of heel stress fractures, Achilles tendonitis, calf strains, knee injuries and forefoot injuries related to overuse. Shod runners, who make initial ground contact with their heels, also might be at risk for these injuries.
Done correctly, however, barefoot or minimalist running results in less impact than running in traditional shoes, Nicacio said.
A forefoot strike reduces the sheer force on the foot and ankle, though the calf muscles must work much harder.
Even with a modified form and a forefoot strike, barefoot and minimalist runners are still at risk for some problems, particularly calf overuse injuries, Nicacio said.
People going barefoot or in shoes with minimal cushioning also have to worry about puncture wounds from stepping on sharp objects, he said. In the warmer months, hot pavement can present a problem, too.
Nicacio said people should educate themselves on proper running form before they try barefoot or minimalist running, and take it slowly when they start. He recommends running no more than a quarter or a half mile to start, then adding 10 to 20 percent every one to two weeks.
--Mary Ann Albright