Gina Kolata on exercise. It’s a topic of endless debate among
runners. Is there a best way to run, so that you use the least
energy and go the fastest? And does it help to run barefoot or
in minimalist shoes? Most of the scientific research is just
inadequate to answer these questions, said Iain Hunter, a
biomechanics researcher at Brigham Young University. Some
studies have indicated that the fastest middle-distance runners
— those racing between about half a mile and a mile — land on
the midfoot or forefoot. But for these runners, economy — using
the least amount of energy — is not an issue, because the race
is so short. When people sprint or run very fast for short
distances, they naturally change stride, landing more toward the
front of the foot. But that does not mean running that way is
better for longer distances. Last spring, Dr. Hunter saw an
opportunity to get some data on elite distance runners and to
determine if there is a particular style they favor. Do they hit
the ground with the heel, midfoot