Influence of shoes and cover characteristics on the prosthetic feet Energy Storage and Release mechanism

In the Energy Store and Release (ESR) prosthetic feet the energy is stored in spring mechanism during the initial contact phase and will be released during push-off phase. The ESR mechanism is modified during the amputee's gait by the influence of the cover and the shoes' sole's materials characteristics. Other variables could interfere, such as: body weight and walking speed.