Discussions
During the peak VGRF there something unexpected happened. In the study done by (Zhang, Paquette and Zhang 2013) there was an. Increase in peak VGRF from barefoot to shod. From the results that were obtained from this study with a backpack on there was a small decrease from barefoot to shod, while without a backpack there was an increase from barefoot to shod. This does not agree with the study done by (Zhang, Paquette and Zhang 2013), I cannot explain why this does not agree. There is an decrease in peak VGRF from barefoot unloaded to barefoot loaded, while there is a increase in Peak VGRF from shod unloaded to loaded. One theory for why this happened is of the discomfort of stepping on the heel without any padding. When there is padding the volunteer doesn’t feel nearly as much discomfort when stepping so they won’t try and lower the amount of force being placed with the heel, a strategy to decrease the amount of force would be to decrease step time.
The loading rate showed a decrease from barefoot loaded to shod loaded. This happens because there is padding on the bottom of a shod to absorb the force of the step while barefoot there is only the natural padding that is on your heel. When a load is added the loading rate does not change from bare foot to shod, a theory for why this happens is because the load cancels out the padding of the shod.
The peak braking and propulsive GRF stays the same from barefoot loaded to shod loaded and barefoot unloaded to shod unloaded. From barefoot unloaded to barefoot loaded and shod unloaded to shod loaded there was a decrease. This change was so small that there is nothing to base it off of. The peak braking GRF showed minor changes as well but these changes were so small that there is nothing to base them off of.
The data that has been gathered from this study about step length there shows that there is practically no change from barefoot unloaded to barefoot loaded, while from shod unloaded to shod loaded there is a very significant change. From barefoot unloaded to shod unloaded there was an increase in step length. These results were the same in the study done by Engelen et al (2010), it’s related to the discomfort of the force from stepping. By shortening the distance of your step length you decrease the amount of force being applied to the ground. These results agree with the results from the Majumdar et al (2006) study. The information that has been gathered about the step time is the same as what was gained from the step length because the speed was fixed.
The loading rate showed a decrease from barefoot loaded to shod loaded. This happens because there is padding on the bottom of a shod to absorb the force of the step while barefoot there is only the natural padding that is on your heel. When a load is added the loading rate does not change from bare foot to shod, a theory for why this happens is because the load cancels out the padding of the shod.
The peak braking and propulsive GRF stays the same from barefoot loaded to shod loaded and barefoot unloaded to shod unloaded. From barefoot unloaded to barefoot loaded and shod unloaded to shod loaded there was a decrease. This change was so small that there is nothing to base it off of. The peak braking GRF showed minor changes as well but these changes were so small that there is nothing to base them off of.
The data that has been gathered from this study about step length there shows that there is practically no change from barefoot unloaded to barefoot loaded, while from shod unloaded to shod loaded there is a very significant change. From barefoot unloaded to shod unloaded there was an increase in step length. These results were the same in the study done by Engelen et al (2010), it’s related to the discomfort of the force from stepping. By shortening the distance of your step length you decrease the amount of force being applied to the ground. These results agree with the results from the Majumdar et al (2006) study. The information that has been gathered about the step time is the same as what was gained from the step length because the speed was fixed.