The Invisible Fix: Hiding Clinical Foot Science Inside the Shoes Women Actually Want to Wear

Plantar Heel Pain (PHP) is a very common and often debilitating condition, affecting approximately 1 in 10 people with women up to 2.5 times more likely to report this condition than men. Most existing research into footwear design for PHP focuses on the mechanical performance of sports footwear or clinical orthotics. The challenge was to investigate how specific design features in everyday footwear could improve the real-life experience of women suffering from PHP, in order to inspire both positive change in clinical non-surgical intervention and the innovative design of practical, wearable footwear that helps to alleviate the symptoms of PHP.

The project was informed by over 15 years of FRANKIE4 customer feedback, including 150,000+ five-star reviews frequently highlighting relief from heel and forefoot discomfort. While this provided valid real-world insight, FRANKIE4 moved beyond anecdotal evidence to validate performance.FRANKIE4 partnered with Queensland University of Technology (QUT) on an independent, ethics-approved, government co-funded study with an industry-recognised research team.A controlled study evaluated six randomised shoe and insole conditions alongside a control shoe, measuring immediate effects on plantar pressure, impact forces and comfort. This enabled design variables to be isolated and their effects on biomechanical outcomes to be clearly understood.

This project demonstrates how thoughtful design can directly improve everyday wellbeing. By identifying footwear features that effectively reduce pressure and spread load as well as increasing comfort, the research has clear positive benefits for people experiencing PHP, particularly those who spend long hours standing or walking. The findings provide valuable practical guidance for both clinicians and designers, helping bridge the gap between research and real-world application. Commercially, the insights support the development of better-performing products, while more broadly contributing to preventative health by showing how everyday design decisions can help to reduce pain and improve quality of life.

Key features of this project include its combination of scientific rigour and real-world design application. The innovative approach of this study integrates objective biomechanical data with user-reported comfort and pain ratings, ensuring both performance and experience are considered equally in the design process. A major strength is the ability to isolate and evaluate specific design variables, including outsole material, heel-to-toe pitch, and insole contouring. This provides clear, actionable insights into how individual features contribute to overall performance. Acknowledging that comfort is a major factor in delivering any lasting biomechanical benefits to the consumer is a novel approach to research and has enriched the insights from this study. The research highlights the importance of designing footwear as a system, showing that the interaction between shoe and insole is critical to achieving optimal outcomes, moving beyond traditional approaches that consider components in isolation. Importantly, the project focuses on everyday footwear rather than athletic or clinical products, addressing a significant gap in existing research and making the findings highly relevant to real-world users, particularly women in occupations that require prolonged standing. Finally, the collaboration between industry and independent researchers represents practical relevance, demonstrating a strong model for design-led research and innovation.