Rocker shoes were initially developed for patients with ankle fusions. The rocker design allows the motion of rolling over the fused ankle to supplement the abnormal motion of the ankle. The amount of energy used for this rolling motion is much greater than that of a normal ankle joint.
Rocker bottom shoes stretch the tendons around the ankle joint and increase the energy expenditure for walking. If that is what you want, then you can use them but any benefits that are advertised (if you don’t have an ankle fusion) are really not credible.
Dr. Corenman