Ever since composite prosthetics became economically feasible, the demand for them began to rise. Today they cover a wide base of users and are constantly evolving to be a great substitute for healthy limbs.However, this was not always the case. The beginnings of prosthetics were fairly primitive and prosthetic appliances were mostly used for cosmetic purposes. As science began to develop, prosthetics became ever more sophisticated. The greatest advances were always made during great wars and/or after them, as the demand for prosthetic appliances drastically grew. These days there are a lot of other reasons for limb loss, including various diseases, especially in developed countries. Therefore prosthetic science is developing constantly. There is a clear transition from primitive, crude and common engineering material to new material sciences and new materials, like composite materials. Certain firms have specialized in the field of composite prosthetics and there is a clear striving for individualization and adaptability of prosthetic appliances. Prosthetic are being made for many different groups of people, based on criteria like height, weight or gender. There are prosthetics available which are specialized to certain field of expertise, e.g. sprinting, swimming etc. However, there are also prosthetics available which are used on an everyday basis for everyday tasks. Those types of prosthetics can adapt very well to everyday situations. Besides individualization, there is a clear step towards inconspicuousness and natural feel of everyday prosthetics. Running-specific prosthetics on the other hand fall into the category of specialized prosthetics. They can be used either on an amateur or a professional level. For this reason it is important to optimize them for comfortability so they don’t hinder athletes in their accomplishments. Another way to increase performance is to maximize energy return for running prosthetics and therefore minimize strain on the body and thereby fatigue.The goal of this Master’s Thesis is to perform several dynamic analyses on a running-specific prosthesis with variations in composite materials, layups and fiber orientations. The results of the analyses were compared to evaluate the influence of the individual input parameters on the performance of the prosthesis.