Biomecánica lateral de las zapatillas

Las zapatillas de correr pueden tener defectos de fabricación o diseño. Compruebo su biomecánica para evitar lesiones.

Analizo la biomecánica lateral de las zapatillas antes y después de comprarlas.

Antes:

Miro vídeos a cámara lenta y alta calidad. Observo la pronación de diferentes corredores con un mismo modelo de zapatilla, o un mismo corredor con diferentes zapatillas.
Miro fotos con la zapatilla apoyada en el suelo, desde una perspectiva posterior. Analizo qué partes de la suela quedan en el aire, si el talón queda vertical y si la mediasuela queda horizontal.

Después:

#ideas:

Relative to joints couplings, certain patterns have been identified as detrimental for the runner´s musculoskeletal health such as prolonging the subtalar eversion beyond the peak knee flexion, which increases the knee stress due to the opposite torques acting on the proximal and distal ends of the tibia [1].

Prolonged eversion has been previously cited as a potential risk factor for developing Achilles tendinopathy and medial tibial stress syndrome [2].

stiffer midsoles reduce peak eversion and eversion excursion. increase in impact peak on the softer surface suggests that runners increase their lower extremity stiffness when running on a compliant surface (suelo o zapatilla) [3].

Peak eversion angle correlaciona con mayor riesgo de lesión. Comparison of ankle kinematics and ground reaction forces between prospectively injured and uninjured collegiate cross country runners [4].

Evitar midsole flare. Aumentan la inestabilidad en medias laderas o al pisar suelos irregulares.

Esto puede ser la causa de tanta eversión en las zapatillas: Under the heel we have a softer compound and along the outside of the heel we have a harder compound to keep the midsole in shape [5].

Referencias

1. BORGIA, Brianne; FREEDMAN SILVERNAIL, Julia; BECKER, James. Joint coordination when running in minimalist, neutral, and ultra-cushioning shoes. Journal of Sports Sciences, 2020, vol. 38, no 8, p. 855-862.

2. HANNIGAN, J. J.; POLLARD, Christine D. Biomechanical analysis of two runners who developed leg injuries during a six-week transition to maximal running shoes: A case series. Journal of Sports Sciences, 2021, vol. 39, no 20, p. 2305-2311.

3. BUTLER, Robert J.; DAVIS, Irene S.; HAMILL, Joseph. Interaction of arch type and footwear on running mechanics. The American journal of sports medicine, 2006, vol. 34, no 12, p. 1998-2005.

4. KUHMAN, Daniel J., et al. Comparison of ankle kinematics and ground reaction forces between prospectively injured and uninjured collegiate cross country runners. Human movement science, 2016, vol. 47, p. 9-15.

5. Zapatillas Nvii Race 2023.