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Article
Leg and Joint Stiffness Adaptations to Minimalist and Maximalist Running Shoes
Journal of Applied Biomechanics
  • Allison H. Gruber, Indiana University
  • Shuqi Zhang, Boise State University
  • Jiahao Pan, Boise State University
  • Li Li, Georgia Southern University
Document Type
Article
Publication Date
10-1-2021
Disciplines
Abstract

The running footwear literature reports a conceptual disconnect between shoe cushioning and external impact loading: footwear or surfaces with greater cushioning tend to result in greater impact force characteristics during running. Increased impact loading with maximalist footwear may reflect an altered lower-extremity gait strategy to adjust for running in compliant footwear. The authors hypothesized that ankle and knee joint stiffness would change to maintain the effective vertical stiffness, as cushioning changed with minimalist, traditional, and maximalist footwear. Eleven participants ran on an instrumental treadmill (3.5 m·s−1) for a 5-minute familiarization in each footwear, plus an additional 110 seconds before data collection. Vertical, leg, ankle, and knee joint stiffness and vertical impact force characteristics were calculated. Mixed model with repeated measures tested differences between footwear conditions. Compared with traditional and maximalist, the minimalist shoes were associated with greater average instantaneous and average vertical loading rates (P < .050), greater vertical stiffness (P ≤ .010), and less change in leg length between initial contact and peak resultant ground reaction force (P < .050). No other differences in stiffness or impact variables were observed. The shoe cushioning paradox did not hold in this study due to a similar musculoskeletal strategy for running in traditional and maximalist footwear and running with a more rigid limb in minimalist footwear.

Citation Information
Allison H. Gruber, Shuqi Zhang, Jiahao Pan and Li Li. "Leg and Joint Stiffness Adaptations to Minimalist and Maximalist Running Shoes" Journal of Applied Biomechanics (2021)
Available at: http://works.bepress.com/shuqi-zhang/29/