The Institute for Biomechanics at the Swiss Federal Institute of Technology, Zurich, conducted a study to investigate the influence of the kyBoot and Joya shoes developed by Karl Müller Senior and Junior on the gait pattern when walking and running and to examine the forces placed on the feet. The study included 12 test subjects (barefoot, kyBoot, Joya, MBT and Joyssy for 3 test subjects), high-speed video recordings of impacts on the ground, kinetic measurements of ground reaction forces and kinematic measurements of the position and movement of the body.