Those with diabetes mellitus have an increased risk for falls. This is mostly due to the development of peripheral neuropathy which reduces the sensory input from the plantar surface of the foot. This neuropathy also puts them at increased risk for complication such a plantar ulcers, often referred to as the diabetic foot. A number of different strategies are often used to reduce the pressures under the ball of the foot to reduce the risk of these complications. One of these methods is a rocker bottom shoe. This has been shown to reduce plantar pressures, but there is a risk it may increase the risk for falls due to the instability the rocker may create.
A study in Gait and Posture from researchers at East Carolina University used 20 healthy controls to investigate what rocker sole shoes did to parameters associated with the center of mass and center of pressure which are measure of postural stability. They concluded:
In young healthy adults, shoes with rocker bottom soles had a destabilizing effect to perturbed stance, thereby increasing the potential for imbalance. These results raise concerns that footwear with rocker bottom sole modifications to accommodate an insensate foot may increase the risk of falls.
– the subjects were healthy adults and not people with diabetic neuropathy.
– its does point to a theoretical increase in instability in those who do have diabetic neuropathy.
– rocker sole shoes probably should be used with caution in those with diabetic foot complications, especially if they have other risk factors present for falls.