Advanced footwear technology has rewritten the record books, but a study from Mass General Brigham published in the journal PM&R suggests the same shoes that make runners faster may also be nudging them towards injury. The research found that running in carbon-plated, highly cushioned racing shoes produces subtle changes in gait, specifically a lower cadence and greater inward collapse of the foot, that are established risk factors for bone stress injuries.
The study was deliberately small and tightly controlled. Twenty-three healthy elite distance runners, eleven women and twelve men, ran in three different conditions: a neutral shoe, a lightweight responsive-foam trainer, and an advanced footwear model combining a thick, compliant midsole with a stiff embedded plate. By holding the runners constant and varying only the footwear, the researchers could isolate how the shoe itself reshaped mechanics rather than how different athletes happened to move.
Two findings stood out. In the advanced footwear condition, runners took fewer steps per minute, a drop in cadence that typically goes hand in hand with a longer stride and a degree of overstriding. Lower cadence and longer strides increase the loading the skeleton must absorb with each footfall. The athletes also showed greater rearfoot eversion excursion, a measure of how far the foot rolls inward through the gait cycle. Both changes are individually linked in the wider literature to the accumulation of bone stress over a training block.
The authors were careful not to overclaim. The study does not show that super shoes cause bone stress fractures, only that they shift biomechanics in a direction associated with elevated risk. Whether those small, repeated changes translate into actual injuries over months of high-volume training is precisely the question the next wave of research will need to answer, ideally through prospective studies that track runners and their footwear over a full season rather than across a single laboratory session.
For now, the practical guidance is measured rather than alarmist. Athletes and coaches need not abandon the technology that has reshaped competitive racing, but the findings reinforce the case for rotating footwear rather than logging every session in racing shoes, for introducing advanced models gradually, and for treating a sudden, wholesale switch to plated shoes as a meaningful change in training load. As with much of the super-shoe era, the performance gains are real and so, increasingly, is the need to manage their side effects.