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Post 1 — Why Center of Pressure (COP) Is the Gold-Standard of Gait Control

COP traces how the load travels under your foot during stance. Its path and velocity reflect balance control, dynamic stability, orthotics effectiveness, and gait efficiency—signals that step counts can't reveal. Without reliable COP, gait analysis is mostly guesswork.

What COP actually tells you

  • Stability & balance control: COP motion quantifies postural control; greater variability/velocity often indicates lower stability.
  • Dynamic gait mechanics: The COP trajectory is an indirect manifestation of COM (center of mass) control—useful for assessing walking stability.
  • Clinical insights & orthotics: COP trajectory during stance can elucidate foot pathology and help assess orthotic effectiveness; COP velocity correlates with gait speed and efficiency.

Why many insoles can't do COP (and why walkpad can)

COP needs high-density pressure maps across the whole foot plus adequate sampling. Sparse sensors can't resolve a smooth, reliable COP path—so many "gait" insoles skip it. walkpad computes true COP from a dense sensor matrix with IMU fusion.

Takeaways for runners, coaches, clinicians

  • If your gait tool doesn't compute COP path and velocity, you're missing the most informative stability/control signals.
  • Use COP to track progress, orthotic tuning, and return-to-sport decisions.

Selected references

[1] Quijoux et al., 2021 — Review

A review of center of pressure (COP) variables to quantify standing balance in elderly people: Algorithms and open-source toolbox

https://pmc.ncbi.nlm.nih.gov/articles/PMC8623280/

[2] Tipton et al., 2023

Approximate Entropy and Velocity of Center of Pressure to Index Stability of Quiet Standing

https://www.mdpi.com/2076-3417/13/16/9259

[3] Ruhe et al., 2010 — Systematic review

Center of pressure excursion as a measure of balance performance in patients with non-specific low back pain

https://pmc.ncbi.nlm.nih.gov/articles/PMC3048236/

[4] Richmond & Abrams, 2021 — Perspective

The assessment of center of mass and center of pressure during quiet standing: current perspectives and future directions

https://www.sciencedirect.com/science/article/abs/pii/S0021929021002669

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