Simi and the Pro7 Galileo experiment: duck-like walk by wearing flip-flops?
After analysis of captured data with the Simi Motion software we discovered similarities between a walking duck and a human walking with flip-flops. The similarities were especially obvious in the acceleration of the knee joint and the ankle joint. This means a human foot hits the ground just like a duck's does. In addition, the fact that the shoe is not tightly connected to the foot might lead to the foot "searching for ground" faster. This seems to be a result of the fear of losing the shoe.
Furthermore, the results show clearly that walking with flip-flops is more unstable than barefoot walking. This is precisely shown by the local discontinuities in the flip-flop diagram curves. Walking with flip-flops does not only lead to higher angles, but also to higher angle speeds and accelerations.
Based on these results, flip-flops should be considered a fashion accessory and not be worn all the time. Of more use are shoes that support the foot in its natural posture and movement.
Obviously, a duck is not a human being, so there are some differences. Especially the foot placement was contrary: while the foot tip points slightly outwards during human gait (with flip-flops as well), the duck's point inwards. It is noticeable that during one step, the duck retracts its foot almost completely under its wing as if it had to step over an obstacle. Human gait is much more economic and ergonomic as the foot raises only as high as necessary. It is because of these two differences that ducks move far more efficiently in the water than on land.
Click here to view the 3D diagrams from this analysis in detail:
