To investigate the influence of Joya shoes on people’s gait when walking, and to study the forces acting on their feet, the Biomechanics Institute at the Swiss Federal Institute of Technology (ETH Zurich) carried out a study using a gait analysis. This study involved twelve test subjects and looked into the sequence of movements when walking barefoot, in Joyas, in KyBoots and in MBTs. The analysis used high-speed video recordings of foot strike, kinetic measurements of the ground reaction force and kinematic measurements of body position and movement.
The Swiss Federal Institute of Technology’s results speak in favor of Joya:
- In the first heel-strike phase, the cushioning effect of the Joya sole reduces the forces affecting the body considerably (by a factor of 2 to 5) compared with walking/running barefoot.
- Joya produces a far greater range of motion as the sole’s soft, supple structure makes it very yielding. When we walk barefoot on an uneven, natural surface (on sand, uphill, downhill, etc.), the range of motion is also naturally larger. The soft, supple structure of the sole makes it likely that more effort will be required, more energy required and the muscles will get more exercise.
- In Joya shoes, motion graphs generally follow a smoother track (less jerky) than in conventional shoes.
- No difference was found between the Karl Mueller shoes and the rocker sole shoes when it came to upper body posture.
Read more here:
Summary ETH study “Gait parameters of various shoes” (PDF, 4MB)
Full length ETH Studie in German: "Gangparameter von verschiedenen Schuhe" (PDF, 7MB)
Study conducted by Dr Dr Silvio Lorenzetti in cooperation with Dr Renate List, Patrick Hiltpold, Aline Mühl. (c) ETH Zürich 2011.