Measuring Comfort Perception of Footwear

NewsBot · Mar 11, 2010

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Identifying Clinically Meaningful Tools for Measuring Comfort Perception of Footwear.
Mills K, Blanch P, Vicenzino B.
Med Sci Sports Exerc. 2010 Mar 8. [Epub ahead of print]

PURPOSE:: Measures of comfort are important in the prescription and development of footwear. The purpose of our study was to examine 3 commonly used scales (visual analogue scale (VAS), Likert and ranking scale) to determine the most reliable, calculate a minimal clinically important change in rating scales and explore dimensions of comfort important to the patient.

METHODS:: 20 subjects were consecutively allocated to 2 experiments consisting of 5 sessions of repeated measures. Using comfort measures from each subject's usual jogging shoe, experiment 1examined the reliability of the VAS and Likert scales over 6 dimensions of the foot, including overall comfort. The second experiment examined the reliability of ranking scale by assessing the ranked position of the shoe. Comfort measures were taken in both walking and jogging.

RESULTS:: The ranking scale was the most stable scale. Mixed linear modelling found VAS was more stable than the Likert scale. The VAS required 2 sessions to become reliable for all measures but those taken from the heel, which required more. Using data-derived approach, a clinically important change in comfort was 9.59 mm on the 100 mm VAS, an anchor-based approach was 10.2 mm. Subjects identified arch comfort as the most important consideration in footwear comfort.

CONCLUSIONS:: Ranking scale and VAS are reliable measures of footwear comfort. Using the VAS, a change 9.59 mm and10.2 mm indicate a clinically relevant change in comfort. The most important dimensions to the patient are overall comfort and the arch.
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NewsBot · Jan 4, 2014

Perception of comfort in running shoes

Biomechanical variables and perception of comfort in running shoes with different cushioning technologies
Roberto C. Dinato, Ana P. Ribeiro, Marco K. Butugan, Ivye L.R. Pereira, Andrea N. Onodera, Isabel C.N. Sacco
Journal of Science and Medicine in Sport; Available online 1 January 2014

Objective
To investigate the relationships between the perception of comfort and biomechanical parameters (plantar pressure and ground reaction force) during running with four different types of cushioning technology in running shoes.
Design
randomized repeated measures.
Methods
Twenty-two men, recreational runners (18 to 45 years) ran12 km/h with running shoes with four different cushioning systems. Outcome measures included nine items related to perception of comfort and 12 biomechanical measures related to the ground reaction forces and plantar pressures. Repeated measure ANOVAs, Pearson correlation coefficients, and step-wise multiple regression analyses were employed (p≤0.05).
Results
No significant correlations were found between the perception of comfort and the biomechanical parameters for the four types of investigated shoes. Regression analysis revealed that 56% of the perceived general comfort can be explained by the variables push-off rate and pressure integral over the forefoot (p = 0.015) and that 33% of the perception of comfort over the forefoot can be explained by second peak force and push-off rate (p = 0.016).
Conclusions
The results did not demonstrate significant relationships between the perception of comfort and the biomechanical parameters for the three types of shoes investigated (Gel, Air, and EVA). Only the shoe with Adiprene+ technology had its general comfort and cushioning perception predicted by the loads over the forefoot. Thus, in general, one cannot predict the perception of comfort of a running shoe through impact and plantar pressure received
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Blaise Dubois · Jan 6, 2014

Re: Perception of comfort in running shoes

Interesting,
In Quebec City, we are in the process to investigate comfort (stand-up, walking, running). The client is blind (covering sheet on top of the different shoe)… and test different shoes with different minimalist index (TRC rating) -no just big bulky shoe-
The tendency for the moment is:
1. They prefer more minimal shoes
2. that are not to far from their habits
It seems that this perception persist after for longer run...

Dr. Steven King · Jan 6, 2014

Re: Perception of comfort in running shoes

Aloha,

Shoe and orthotic comfort has always been difficult to test and even more dificult to prove.

One attribute i rarely see in shoe comfort ratings is how comfortable they are on the lower extreamity, lower back and body as a whole.

They often tend to focus on the comfort of the foot not the whole body that is being affected by the function (or lack of fuction ie minimalism) of the orthosis/footwear.

What is true comfort?

A Hui Hou,
Steve

NewsBot · Aug 11, 2015

Re: Perception of comfort in running shoes

Evolution of perceived footwear comfort over a prolonged running session
F. Hintzy, J. Cavagna, N. Horvaisa
The Foot; Online first

Highlights
•The perceived overall footwear comfort decreased over prolonged trail running at race speed.
•The change in overall footwear comfort therefore indicated a clinically relevant deterioration in footwear comfort over time.
•This decrease was not proportional to time and became significant only after 44 min of running or 7.8 km.
•Judgement based on perception could then be skewed by fatigue independently of the actual footwear comfort.
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Background
The purpose of this study was to investigate the subjective perception of overall footwear comfort over a prolonged running session.

Methods
Ten runners performed two similar sessions consisting of a 13-km trail run (5 laps of 2.6 km) as fast as possible. The overall footwear comfort was evaluated before running and at the end of each lap with a 150-mm visual analogic scale, as well as speed, heart rate and rate of perceived exertion.

Results
The results showed that both overall footwear comfort and speed decreased consistently during the run session, and significantly after 44 min of running (i.e. the 3rd lap). It could be hypothesized that the deterioration of overall footwear comfort was explained by mechanical and energetical parameter changes with time and/or fatigue occurring at the whole body, foot and footwear levels.

Conclusion
These results justify the use of a prolonged running test for running footwear comfort evaluation.
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Dr. Steven King · Aug 11, 2015

Re: Perception of comfort in running shoes

Aloha,

I suppose similar findings are found in the sports equipment industry such as with backpack comfort and other pieces of needed gear. I know the best way to test our combat boots and shoes is on a long run. Things start to feel a little different at mile 16 and again at 26. And it is amazing how many things just go away in the end as you run through them and how many things that did not seem like a problem on the run become so a day or two afterward.

It would have been nice to see the additional condition of barefoot running in this study but test runners may have some issue with that and you cannot force study subjects to do something they consider dangerous or harmful without assuring and proving it to them otherwise. You also are responsible if they do get hurt.

A Hui Hou,
Steve

NewsBot · Sep 30, 2015

Re: Perception of comfort in running shoes

Definition and evaluation of plantar mechanical comfort for the support of footwear design
Charlie C.L. Wang, Chinese University of Hong Kong, and Yunbo Zhang
Computer-Aided Design and Applications

Footwear is one of the most widely and intensively used human centric products. Evaluating and optimizing footwear performance is of outmost importance for human comfort. This paper presents a definition of foot plantar mechanical comfort along with a detailed approach for evaluating it through finite element analysis. An extensive review of biomechanical and shoe mechanical aspects related to human comfort is presented providing ample justification for the selection of the comfort characteristics which are addressed in this paper. A foot biomodel has been developed which is combined with solid shoe structures in order to evaluate plantar pressures distribution and shock absorption. In addition, bending and torsional behavior of shoe structures is also taken into account and, therefore, appropriate finite element models have been developed and tested. All experiments are analytically presented and discussed, while the related results illustrate the potential of the proposed approach to support footwear design optimization under an integrated biomechanics-enabled framework
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NewsBot · Oct 21, 2015

Re: Perception of comfort in running shoes

Footwear fit perception with or without attention
Wing Kai Lam, Hiu Tung Fung & Jamie Matthew Poolton
Footwear Science

Purpose: The overarching aim of this study was to evaluate the role of attention in basketball footwear fit perception.

Experimental protocol: Twenty-nine university basketball players rated footwear fit of correctly fitted basketball shoes and of shoes half a US size smaller and half a US size bigger following three fit perception protocols of increasing complexity (Step-In; Basic Course; Basketball Specific Course). The fit perception protocols were completed both with and without concurrent performance of an attentionally demanding secondary task. Footwear fit was rated by response to both a four-variable scale and a two-variable scale. The experiment protocol was repeated on a second day to test for inter-day reliability.

Results: The player's sensitivity to differences in shoe size was similar following each fit perception protocol and substantial and almost perfect inter-day reliability was demonstrated (ICC > 0.6). The imposition of a secondary task had no detrimental effect on players' capacity to differentiate shoe size (P > 0.05). Reducing the number of fit judgements resulted in superior shoe size differentiation (P < 0.05).

Conclusion: The findings imply that the availability of attention would be similar across fit perception protocols of different complexity. Moreover, asking players to consider fewer aspects of forefoot shoe fit may result in better and more reliable judgements of shoe fit.
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NewsBot · Jan 21, 2016

A reliable measure of footwear upper comfort enabled by an innovative sock equipped with textile pressure sensors
Alexis Herbaut et al
Ergonomics

Footwear comfort is essential and pressure distribution on the foot was shown as a relevant objective measurement to assess it. However, asperities on the foot sides, especially the metatarsals and the instep, make its evaluation difficult with available equipments. Thus, a sock equipped with textile pressure sensors was designed. Results from the mechanical tests showed a high linearity of the sensor response under incremental loadings and allowed to determine the regression equation to convert voltage values into pressure measurements. The sensor response was also highly repeatable and the creep under constant loading was low. Pressure measurements on human feet associated with a perception questionnaire exhibited that significant relationships existed between pressure and comfort perceived on the first, the third and the fifth metatarsals and top of the instep.

Practitioner Summary: A sock equipped with textile sensors was validated for measuring the pressure on the foot top, medial and lateral sides to evaluate footwear comfort. This device may be relevant to help individuals with low sensitivity, such as children, elderly or neuropathic, to choose the shoes that fit the best.
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NewsBot · Jul 9, 2016

Intra-rater reliability of footwear-related comfort assessments
Stefan Hoerzer, Matthieu B. Trudeau, W. Brent Edwards & Benno M. Nigg
Footwear Science: 08 Jul 2016

Comfort is an important aspect of athletic footwear since it has been associated with health and performance benefits. Footwear comfort is also a key consideration in orthotic therapy during the prescription/fitting process of foot orthoses. However, little is known about the actual ability of individuals to reliably assess footwear-related comfort. Therefore, the main objective of this study was to determine the intra-rater reliability of footwear comfort assessments. Ninety healthy male adults completed one familiarization and two testing sessions on different days. During each session, participants performed running trials to assess comfort of six different shoe insoles using Visual Analog Scales (VASs) and Yes?No questions. For the VAS, intra-rater reliability was determined using intra-class correlation coefficients. Cronbach's alpha was calculated to obtain the intra-rater reliability based on the Yes?No questions. For 31.1% of the participants a reliable assessment based on the VAS (intra-class correlation coefficient ≥ 0.7) was obtained. Using Yes?No questions (Cronbach's alpha ≥ 0.7), 46.7% of the participants had a reliable comfort assessment. The majority of individuals did not seem able to reliably assess footwear comfort, and the reason for this poor reliability remains unclear. However, when using footwear comfort in orthotic therapy, scientific research projects, or footwear development one should account for this low reliability of comfort assessments. This may be done by (1) simplifying the measure used to assess comfort, (2) only selecting individuals that were pre-tested for reliable assessments, and/or (3) establishing mean comfort ratings for an individual across multiple testing sessions.
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Dr. Steven King · Jul 10, 2016

Aloha,
This is a good reason why human subject testing of footwear and orthotic therapies should be held off until further biomechanical testing is done by purely mechanical means.
Asking our patients if the "pills" we give them are tasty and easy to swallow does affect compliance but if it results in reducing the effectiveness of the treatment modality what good have we done?

Shoe comfort is not condition for Gait Maximalism.

Maximalism must prove significant improvements of safety, stability, energy efficiency and Greenability.

Mahalo,
Steve

NewsBot · Jul 31, 2018

Comfort assessment of running footwear: Does assessment type affect inter-session reliability?
European Journal of Sport Science

Assessing comfort of running footwear reliably is challenging. The purpose of this study was to compare the intra-rater reliability between different assessment types, to calculate intra-individual reliability scores and to evaluate the effect of rater selection based on individual reliability scores on group level reliability. Three assessment types: ranking, Visual Analogue Scale (VAS), and Likert Scale (LS) were provided twice in six separate sessions among 30 participants, who assessed comfort of five shoes after treadmill running. Spearman's rho provided an evaluation of inter-session relative reliability and typical error as a measure of absolute reliability for each assessment type. Ranking (r = 0.70, 95% confidence interval [CI] 0.61–0.78) yielded the highest relative reliability for overall comfort, followed by VAS (r = 0.67, 95% CI 0.56–0.75) and LS (r = 0.63, 95% CI 0.52–0.72), with large-scale overlaps of CIs between assessment types. The same order of assessment types was found for the percentage of reliable raters (r ≥ 0.7) with 60% in ranking scale, 47% in VAS and 37% in LS. Forming subgroups corresponding to the intra-individual reliability substantially increased group level reliabilities. Based on measures of relative reliability, an extreme reduction in resolution as provided by the ranking from pairwise comparisons seems to be a valuable tool in footwear comfort assessments if assessment time is of minor importance. No preference can be provided for the two investigated rating scales. Besides the assessment type, a selection of the best raters in additional reliability checks seems to be a prerequisite for further comfort-related studies.
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NewsBot · Dec 16, 2018

Running Pattern Recognition in a Comfortable and an Uncomfortable Shoe Condition
Manz, Sabina
Thesis, 2018

The diverse development of running shoes has mostly been driven by three functional factors: reducing injury risk, increasing performance, and increasing perceived comfort. The few studies that focused on comfort provide contradicting results. Comfort is a subjective impression, different for every individual, and is speculated to be one of the most important features of a running shoe, however, it is not well understood or quantifiable. As a result, comfort and its relationship to running biomechanics has not been established. The purpose of this study was to (a) distinguish movement patterns while running in a comfortable shoe condition from movement patterns while running in an uncomfortable shoe condition, (b) determine if these patterns are localized to a specific body segment, and (c) determine which classification tool (linear or spherical) yields the most conclusive results. The movement patterns while running in two different shoes were compared and classified using a support vector machine and spherical classification. The classifications were performed using accelerations and angular velocities from all five sensor locations as well as using subsets of the data. The highest classification (61.88%) was found using spherical classification and a subset of the data. Both classification tools resulted in low success rates. The running kinematics in this study were unaffected by a change in comfort. Keywords: running, pattern recognition, comfort, shoes, inertial measurement units
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NewsBot · Jun 9, 2020

The running shoe comfort assessment tool (RUN-CAT): Development and evaluation of a new multi-item assessment tool for evaluating the comfort of running footwear
Christopher Bishop et al
Journal of Sports Sciences: 06 Jun 2020

Comfort is important for running shoe prescription in athletes to enhance performance and potentially decrease injury risk. A three-stage process was used to develop a new running footwear comfort assessment tool (RUN-CAT): (i) a survey of 282 runners to identify meaningful items of comfort, (ii-a) field testing of 100 runners who assessed the comfort of different shoes, (ii-b) item reduction using bootstrap aggregation and weightings using multiple regressions to identify a final set of items, and (iii) defining test-retest reliability, standard error of measurement (SEM), minimal detectable difference (MDD90) and minimal important difference (MID) values for the final tool. Of the 19 initial items, after item reduction, four were included in the final tool: heel cushioning, shoe stability, forefoot cushioning and forefoot flexibility. Reliability of the overall comfort score was good to excellent (within-day ICC 0.88, between-day 0.70) with all four components displaying good reliability (ICC >0.70). The SEM of the comfort score was 2.8 points and the MDD90 was 6.5 mm. Subject nominated MID values ranged from 9.3 to 9.9 mm. The RUN-CAT demonstrates excellent reliability, acceptable measurement error and can discriminate between footwear models. Clinicians and researchers can incorporate the RUN-CAT to optimise running shoe comfort in athletes.
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NewsBot · Sep 22, 2021

Methods for assessing footwear comfort: a systematic review
Elsa C. Matthias,Helen A. Banwell &John B. Arnold
Footwear Science: 18 Aug 2021

Perceived footwear comfort influences wearability and can impact on physical mobility, performance and foot-related complaints. To date, there has been no comprehensive review of the characteristics or methods for measuring perceived footwear comfort. The aims of this systematic review were to identify, appraise and synthesise the literature on methods used to assess perceived footwear comfort, and report their validity and reliability. Electronic databases were systematically searched and the articles screened and appraised for methodological risk of bias using a modified Quality Index checklist. Data on footwear comfort assessment tools (methods, populations, footwear types, reliability/validity) was extracted by two reviewers. A narrative synthesis was undertaken to describe the findings. Ninety-nine articles involving 6980 participants were assessed as eligible for review. Perceived footwear comfort has been assessed by a variety of methods including the visual analogue scale (VAS), Likert-type scales, ranking scales and questionnaires. The studies have covered a range of populations, both healthy and pathological, ranging between ages 8 and 75 years, most commonly adults. Investigations into reliability of perceived footwear comfort scales were limited, and whilst some tools had evidence of moderate to high reliability, findings were population dependent. Developmental or independent validity testing was typically not undertaken. Risk of bias was variable across studies. Perceived footwear comfort assessment has been performed across a wide range of populations and footwear types. Whilst select measures had evidence for their reliability, the results were variable and population dependent. There is scope for further research into the reliability and validity of perceived footwear comfort assessment tools in different populations.
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NewsBot · Oct 26, 2021

Perception of footwear comfort and its relationship with the foot structure among youngest-old women and men.
Puszczalowska-Lizis E, Koziol K, Omorczyk J
PeerJ 9:e12385 https://doi.org/10.7717/peerj.12385

Background
Adequate footwear comfort and functionality are important regardless of age, but they become particularly important in the youngest-old women and men, mainly due to the fact that this age range is the initial period of old age with changes in shoe preferences. The aim of this study was to assess the perception of footwear comfort and its relationship with the feet structure in youngest-old women and men.

Methods
The cross-sectional study covered community dwellers living on their own aged 65–74 years (50 women; 50 men). The feet characteristics were measured using the CQ-ST podoscope (Electronic System, Ltd, EU), and the perception of footwear comfort was assessed with a visual analogue scale. The assessment took into account gender-specific footwear of a certain brand (Befado Dr orto).

Results
Statistically significant intergender differences were observed in the perception of footwear comfort with respect to the shoe heel width (p = 0.022), the arch height (p = 0.013), the overall comfort (p = 0.049) and the material properties of the footwear (p = 0.017). In women, there were statistically significant positive relationships among the heel angle (γ) and the perception of footwear comfort in terms of heel cushioning (p = 0.021), forefoot cushioning (p = 0.015), arch height (p = 0.029). In men, there was a statistically significant negative relationship of the left foot Clarke’s angle with the heel height (p = 0.043), and a positive relationship between the right foot width and the arch height (p = 0.044).

Conclusions
Youngest-old women, compared to men of the same age range, have a higher perception of shoe comfort in terms of the shoe heel width, the arch height, the overall comfort of the footwear and the material properties of the footwear. The appropriate profile and construction of the shoe allows for an increase in the contact surface of the foot with the shoe, hence the improvement in the perception of footwear comfort in people with lowered arch or widened forefoot.
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NewsBot · Nov 5, 2021

Perception of footwear comfort and its relationship with the foot structure among youngest-old women and men
Ewa Puszczalowska-Lizis et al
PeerJ. 2021 Oct 19;9:e12385

Background: Adequate footwear comfort and functionality are important regardless of age, but they become particularly important in the youngest-old women and men, mainly due to the fact that this age range is the initial period of old age with changes in shoe preferences. The aim of this study was to assess the perception of footwear comfort and its relationship with the feet structure in youngest-old women and men.

Methods: The cross-sectional study covered community dwellers living on their own aged 65-74 years (50 women; 50 men). The feet characteristics were measured using the CQ-ST podoscope (Electronic System, Ltd, EU), and the perception of footwear comfort was assessed with a visual analogue scale. The assessment took into account gender-specific footwear of a certain brand (Befado Dr orto).

Results: Statistically significant intergender differences were observed in the perception of footwear comfort with respect to the shoe heel width (p = 0.022), the arch height (p = 0.013), the overall comfort (p = 0.049) and the material properties of the footwear (p = 0.017). In women, there were statistically significant positive relationships among the heel angle (γ) and the perception of footwear comfort in terms of heel cushioning (p = 0.021), forefoot cushioning (p = 0.015), arch height (p = 0.029). In men, there was a statistically significant negative relationship of the left foot Clarke's angle with the heel height (p = 0.043), and a positive relationship between the right foot width and the arch height (p = 0.044).

Conclusions: Youngest-old women, compared to men of the same age range, have a higher perception of shoe comfort in terms of the shoe heel width, the arch height, the overall comfort of the footwear and the material properties of the footwear. The appropriate profile and construction of the shoe allows for an increase in the contact surface of the foot with the shoe, hence the improvement in the perception of footwear comfort in people with lowered arch or widened forefoot.
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NewsBot · Feb 2, 2022

Footwear comfort: a systematic search and narrative synthesis of the literature
Hylton B. Menz & Daniel R. Bonanno
Journal of Foot and Ankle Research volume 14, Article number: 63 (2021)

Objective
To provide a narrative synthesis of the research literature pertaining to footwear comfort, including definitions, measurement scales, footwear design features, and physiological and psychological factors.

Methods
A systematic search was conducted which yielded 101 manuscripts. The most relevant manuscripts were selected based on the predetermined subheadings of the review (definitions, measurement scales, footwear design features, and physiological and psychological factors). A narrative synthesis of the findings of the included studies was undertaken.

Results
The available evidence is highly fragmented and incorporates a wide range of study designs, participants, and assessment approaches, making it challenging to draw strong conclusions or implications for clinical practice. However, it can be broadly concluded that (i) simple visual analog scales may provide a reliable overall assessment of comfort, (ii) well-fitted, lightweight shoes with soft midsoles and curved rocker-soles are generally perceived to be most comfortable, and (iii) the influence of sole flexibility, shoe microclimate and insoles is less clear and likely to be more specific to the population, setting and task being performed.

Conclusion
Footwear comfort is a complex and multifaceted concept that is influenced not only by structural and functional aspects of shoe design, but also task requirements and anatomical and physiological differences between individuals. Further research is required to delineate the contribution of specific shoe features more clearly, and to better understand the interaction between footwear features and individual physiological attributes.
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NewsBot · Feb 17, 2022

Monitoring the Degree of Comfort of Shoes In-Motion Using Triboelectric Pressure Sensors with an Ultrawide Detection Range
Peng Yang et al
ACS Nano. 2022 Feb 16

Shoes play an important role in sports and human daily life. Here, an in-shoe sensor pad (ISSP) attached to the vamp lining is based on a triboelectric nanogenerator (TENG) for monitoring the real-time stress distribution on the top side of a foot. Each sensor unit on this ISSP is an air-capsule TENG (AC-TENG) consisting of activated carbon/polyurethane (AC/PU) and microsphere array electrodes. The detection range of each AC-TENG reaches 7.27 MPa, which is enough for monitoring the pressure change during different sports. This multifunctional ISSP can realize many typical functions of conventional smart shoes, including step counting and human-machine interaction. Moreover, it can also reveal special information, including the fitness of shoes, the stress concentration on toes, and the in-motion comfort degree. The signal processing and data transmission modules in the system have a hybrid power supply with wireless power transfer, while the real-time information about feet can be observed on a cell phone. Hence, this ISSP provides a potential approach to study the feet motion and comfort degree of shoes in long-term operations, which can guide both athlete training and the customized design of shoes.
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NewsBot · Jun 20, 2022

Can footwear satisfaction be predicted from mechanical properties?
Matthew Q. Salzano et al
Footwear Science: 20 Jun 2022

Research is often conducted to investigate footwear mechanical properties and their effects on running biomechanics, but little is known about their influence on runner satisfaction, or how well the shoe is perceived. A tool to predict runner satisfaction in a shoe from its mechanical properties would be advantageous for footwear companies. Data in this study were from a database (n = 615 subject-shoe pairings) of satisfaction ratings (gathered after participants ran on a treadmill), and mechanical testing data for 87 unique subjects across 61 unique shoes. Random forest and elastic net logistic regression models were built to test if footwear mechanical properties and subject characteristics could predict runner satisfaction in 3 ways: degree-of-satisfaction on a 7-point Likert scale, overall satisfaction on a 3-point Likert scale, and willingness-to-purchase the shoe (yes/no response). Data were divided into training and validation sets, using an 80–20 split, to build the models and test their accuracy, respectively. Model accuracies were compared against the no-information rate (i.e. proportion of data belonging to the largest class). The models were not able to predict degree-of-satisfaction or overall satisfaction from footwear mechanical properties but could predict runner’s willingness to purchase with 68–75% accuracy. Midsole Gmax at the heel and forefoot appeared in the top five of variable importance rankings across both willingness-to-purchase models, suggesting its role as a major factor in purchase decisions. The negative regression coefficient for both heel and forefoot Gmax indicated that softer midsoles increase the likelihood of a shoe purchase. Future models to predict satisfaction may improve accuracy with the addition of more subject-specific parameters, such as running goals or foot proportions.
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has anyone tried the Podotech in-shoe pressure measuring system ?

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