Short answer

When designing orthotics for ankle instability, consider incorporating a raised perimeter ridge to optimize subtalar joint positioning and mechanoreceptor input, thereby improving dynamic balance.

Field: Human Factors
Source: Iranian Rehabilitation Journal (2023)
Method: Quasi-experimental study
Sample: 30 participants
Evidence: Strong effect

A custom foot orthotic with a raised perimeter ridge significantly improves dynamic postural control in individuals with chronic ankle instability compared to standard custom orthotics. This human factors research insight is drawn from a 2023 study published in Iranian Rehabilitation Journal. Using Quasi-experimental study with 30 participants, researchers explored how this design variable affects real-world outcomes. The key design takeaway: When designing orthotics for ankle instability, consider incorporating a raised perimeter ridge to optimize subtalar joint positioning and mechanoreceptor input, thereby improving dynamic balance.

Study

Human FactorsRecentStrong effect

Perimeter-ridged orthotics enhance dynamic balance in chronic ankle instability

A custom foot orthotic with a raised perimeter ridge significantly improves dynamic postural control in individuals with chronic ankle instability compared to standard custom orthotics.

Iranian Rehabilitation Journal · 2023

Key Findings

01Both CFO and CRFO improved SEBT reaching distances.
02CRFO showed significantly greater improvements in medial, posteromedial, and anteromedial SEBT directions compared to CFO after one month.

Application

Design takeaway

When designing orthotics for ankle instability, consider incorporating a raised perimeter ridge to optimize subtalar joint positioning and mechanoreceptor input, thereby improving dynamic balance.

How to apply

When designing or specifying orthotic footwear, evaluate the potential benefits of a raised perimeter ridge for improving balance and stability, especially for users with recurrent ankle injuries.

Project actions

01When researching assistive devices, look for studies that compare different design variations.
02Consider how small changes in shape or material can affect how a product works for the user.

Method & Evidence

AimTo investigate the effect of a custom mold foot orthosis with a raised perimeter ridge (CRFO) on the dynamic postural control of individuals with chronic ankle instability.

MethodQuasi-experimental study

ProcedureParticipants with chronic ankle instability were divided into two groups. One group used standard custom mold foot orthoses (CFO), and the other used custom mold foot orthoses with a raised perimeter ridge (CRFO). Dynamic postural control was assessed using the Star Excursion Balance Test (SEBT) before and after one month of use.

Sample30 participants

ContextSports medicine and rehabilitation, biomechanics of footwear and orthotics.

Variables

IVType of custom mold foot orthosis (standard vs. raised perimeter ridge).

DVDynamic postural control, measured by Star Excursion Balance Test (SEBT) reaching distances.

CVParticipant age, activity level, presence of chronic ankle instability, duration of orthotic use (one month).

Strengths & Limitations

Strengths

+Direct comparison between two types of custom orthotics.
+Inclusion of a functional balance test (SEBT).

Limitations

The study participants were young and active, so the findings might not apply to older adults or less active individuals. The study duration was only one month.

Reliability & validity

The use of a standardized test (SEBT) and statistical analysis contributes to the reliability and validity of the findings. However, the quasi-experimental design limits causal inference compared to a randomized controlled trial.

Think critically

How might the 'raised ridge' design interact with different types of footwear or ground surfaces to affect its efficacy?

Design Principles

"Subtle geometric modifications in assistive devices can significantly influence user biomechanical performance."

This finding is crucial for designers developing assistive devices for individuals with mobility impairments or those seeking to enhance athletic performance. Understanding how subtle design modifications to orthotics can impact biomechanical function allows for more targeted and effective product development.

What This Means for Your Design

Adding a raised edge around a special shoe insert can help people with wobbly ankles balance better.

How to use in your project

1.Reference this study when discussing the impact of design features on user biomechanics and functional outcomes in your design project.

Add to My Project

Quick Cite

Paragraph starter

The study by Khaliliyan et al. (2023) demonstrated that custom foot orthoses with a raised perimeter ridge significantly enhanced dynamic postural control in individuals with chronic ankle instability, as measured by the Star Excursion Balance Test. This suggests that specific geometric features of orthotic devices can be optimized to improve user biomechanics and functional outcomes, a principle applicable to the design of various assistive technologies.

Source

Iranian Rehabilitation Journal

Effects of the Custom Mold With a Raised Ridge Around the Perimeter Foot Orthoses on Dynamic Postural Control in Chronic Ankle Instability

journal · 2023

View source

Questions About This Research

What does the research say about perimeter-ridged orthotics enhance dynamic balance in chronic ankle instability?: When designing orthotics for ankle instability, consider incorporating a raised perimeter ridge to optimize subtalar joint positioning and mechanoreceptor input, thereby improving dynamic balance. Evidence: Iranian Rehabilitation Journal (2023).
Why does "Perimeter-ridged orthotics enhance dynamic balance in chronic ankle instability" matter for design?: This finding is crucial for designers developing assistive devices for individuals with mobility impairments or those seeking to enhance athletic performance. Understanding how subtle design modifications to orthotics can impact biomechanical function allows for more targeted and effective product development.
How can designers apply this research?: When designing orthotics for ankle instability, consider incorporating a raised perimeter ridge to optimize subtalar joint positioning and mechanoreceptor input, thereby improving dynamic balance.
What were the main findings?: Both CFO and CRFO improved SEBT reaching distances.. CRFO showed significantly greater improvements in medial, posteromedial, and anteromedial SEBT directions compared to CFO after one month.
What research method was used?: Quasi-experimental study with 30 participants.
How strong is the evidence?: Evidence strength is rated Strong effect, based on a 2023 journal from Iranian Rehabilitation Journal.
What should I do differently in my next project?: When designing or specifying orthotic footwear, evaluate the potential benefits of a raised perimeter ridge for improving balance and stability, especially for users with recurrent ankle injuries.
What are the limitations?: The study focused on young, active individuals; results may differ in other populations. Long-term effects were not assessed.