In his own case, Mr. Daoud now runs consistently with a forefoot landing style, but the transition was not seamless. “I broke a metatarsal while running my first marathon after transitioning a bit too quickly and expecting a bit too much from my body too soon,” he says. So fair warning to those considering making the transition to forefoot landings: “Give your body time!
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Phys Ed: Does Foot Form Explain Running Injuries? - NYTimes.com
I have to remember the last part of this quote…”Give your Body Time.”