Foot speed, foot-strike and footwear: linking gait mechanics and running ground reaction forces
Running performance, energy requirements and musculoskeletal stresses are directly related to the action-reaction forces between the limb and the ground. For human runners, the force-time patterns from individual footfalls can vary considerably across speed, foot-strike and footwear conditions. Here, we used four human footfalls with distinctly different vertical force-time waveform patterns to evaluate whether a basic mechanical model might explain all of them. Our model partitions the body's total mass (1.0Mb) into two invariant mass fractions (lower limb=0.08, remaining body mass=0.92) and allows the instantaneous collisional velocities of the former to vary. The best fits achieved (R2 range=0.95-0.98, mean=0.97±0.01) indicate that the model is capable of accounting for nearly all of the variability observed in the four waveform types tested: barefoot jog, rear-foot strike run, fore-foot strike run and fore-foot strike sprint. We conclude that different running ground reaction force-time patterns may have the same mechanical basis.
© Copyright 2014 The Journal of Experimental Biology. The Company of Biologists. Kaikki oikeudet pidätetään.
Aiheet: | mallintaminen juoksu voima, vahvuus mekaniikka kenkä nopeus jalka sääri, jalka biomekaniikka maan reaktiovoima |
---|---|
Aihealueet: | kestävyys urheilu voima ja nopeus urheilu tekniset ja luonnontieteet valmennusoppi |
DOI: | 10.1242/jeb.099523 |
Julkaisussa: | The Journal of Experimental Biology |
Julkaistu: |
2014
|
Numero: | 217 |
Sivuja: | 2037-2040 |
Julkaisutyypit: | artikkeli |
Kieli: | englanti (kieli) |
Taso: | kehittynyt |