Excessive Pronation Research Articles

탄소나노튜브를 기반으로 하는 충격흡수제의 물리적 특성 비교분석

ABSTRACT The purpose of this study was (a) to develop carbon nanotube-based shock absorbers for reducing potentially harmful impact forcesand excessive foot pronation, and (b) to briefly determine how the effects of carbon nanotube-based shock absorbers on biomechanicalvariance during drop landing. A university student(age: 24.0 yrs, height: 176.2 cm, weight: 679.5 N) who has no musculoskeletaldisorder was recruited as the subject. Hardness, specific gravity, tensile strength, elongation, 100% modulus, tear strength, splittearstrength, compression set, resilience, vertical GRF, and loading rate were determined for each material. For each dependent variable, adescriptive statistics was used for different conditions. The property test results showed that tensile strenth, tear strength, split tearstrength, compression set, and resilience in carbon nanotube-based shock absorbers were greater than general Ethylene VinylAcetate(EVA). These indicated that resistance against variable strength in developed carbon nanotube-based shock absorbers weregreater than general EVA. In vertical GRF of CNTC was less than those of EVA during drop landing and loading rate of CNTCwas greater than EVA. It seems that the use of CNT can be a effective way of reducing and controlling shock from impact.Keywords : Carbon Nanotube, Shock Absorber, Mechanical Property Test, Sports Injury

Differences in Static- and Dynamic-Balance Task Performance After 4 Weeks of Intrinsic-Foot-Muscle Training: The Short-Foot Exercise Versus the Towel-Curl Exercise

Proper functioning of the intrinsic foot musculature (IFM) is essential in maintaining the integrity of the medial longitudinal arch (MLA). Improper functioning of the IFM leads to excessive pronation of the foot, which has been linked to various pathologies. Therefore, training the IFM to avoid excessive pronation may help prevent some of these pathologies; however, it is not clear how to train these muscles optimally. To investigate the effects of 2 different types of IFM training on the height of the MLA and static- and dynamic-balance task performance. Randomized controlled trial, repeated-measures mixed-model design. University biomechanics laboratory for testing and a home-based training program. 24 healthy, university-age volunteers (3 groups of 8) with no history of major lower limb pathology or balance impairment. One experimental group performed 4 wk of the short-foot exercise (SFE) and the other performed 4 wk of the towel-curl exercise (TCE). Participants were asked to perform 100 repetitions of their exercise per day. Navicular height during weight bearing, the total range of movement of the center of pressure (COP) in the mediolateral (ML) direction for a static-balance test and a dynamic-balance test. There were no differences in the navicular height or static-balance tests. For the dynamic-balance test, all groups decreased the ML COP movement on the dominant limb by a small amount (~5 mm); however, the SFE group was able to decrease COP movement much more than the TCE group in the nondominant limb. The SFE appeared to train the IFM more effectively than the TCE; however, there were differing results between the dominant and nondominant legs. These imbalances need to be taken into consideration by clinicians.

Characterisation of pes planovalgus by patients with Juvenile Idiopathic Arthritis with the Oxford Foot Model

Physical Therapy Department, Center of Human Motion Science, Shi-raz University of Medical Sciences, Shiraz, IranIntroduction: Foot hyper pronation may cause malalignment ofthe lower extremity, frequently leading to structural and func-tional deficits both in standing and walking [1]. Based on couplingbetween rear foot frontal plane motion and rotation of tibia, itis speculated that excessive pronation results in abnormal tib-ial rotation which increases stress on the joints of the lowerextremity during weight bearing [2]. It has been postulated thatabnormal subtalar joint motion is linked to knee joint prob-lems like patellofemoral pain syndrome as it may affect kneemechanics. The purpose of this study was therefore to measurepatellofemoral joint forces during stance phase of walking in sub-jects with hyper pronated foot and to compare them to the healthysubjects.Patients/materials and methods: 10 subjects with neutrallyaligned feet and 10 with hyperpronated feet aged 23±2.5 yearswere selected via clinical examination. Kinetic and kinematic datawere collected by using a force platform (Kistler, Switzerland)and six camera motion capture system (Qualisys, Ltd., Sweden)while subjects walked at their preferred speed. Mean and peakknee extensor mechanism forces were quantified using Newto-nian inverse dynamics during stance phase of walking. Then, meanandpeakpatellarmechanismanglesandpatellofemoraljointforceswere calculated in both groups.Results: Significant higher amount of mean patellar mechanismangle and also mean and peak forces across the knee extensormechanism were found in flat footed group compared to normalgroup [P 0.05]. Moreover, statistical analysis revealed a signifi-cant difference in mean patellofemoral joint force between normal(178.3±93.27N)andhyperpronatedfootgroups(478.1±191.5N)[P=0.001]. Peak patellofemoral joint force was also significantlyhigher in flat footed group (561.8±279.6N) compared to normalgroup (269.8±193.8) [P=0.019].Discussion and conclusion: Increased patellofemoral joint forcecauses the patellofemoral joint pathologies like arthritis. It canbe concluded that changes of the medial longitudinal arch heightwould alter the net external flexion moment, force applied to theextensor mechanism, patellar mechanism angle and consequentlythe patellofemoral joint forces during stance phase of walking,through which developing a tendency towards musculoskeletalinjuries.Disclosure: No significant relationships.References

Evaluating the Biomechanics of the Pediatric Foot in Turner Syndrome

Turner syndrome is a genetic disorder that can present clinically with multiple concurrent comorbidities. This case report describes a 12-year-old girl with Turner syndrome who was referred for podiatric medical assessment and explores the application of optoelectronic stereophotogrammetry in the biomechanical assessment of the foot and lower limb. A four-segment kinematic foot model using 14-mm reflective markers was applied to the foot and lower limb of the patient to track motion at the tibia, rearfoot, forefoot, and hallux. Kinematic results presented in this case study illustrate evidence of excessive foot pronation throughout the stance phase of gait. Whether excessive pronation is a general characteristic of foot function in Turner syndrome remains to be confirmed, but the findings presented suggest that a comprehensive evaluation of foot biomechanics in patients with Turner syndrome may be warranted.

Ground reaction forces analyses during the gait of healthy individuals with and without the use of a calcaneus insole

The foot forms the base of propulsion and balance during the gait. It is well known that excessive or prolonged pronation and supination changes the gait’s mechanical movement. Hence, the use of corrective insoles is recommended when calcaneus alterations (valgus and varun) are present. Objetive: The main purpose of this article was to analyze the effects of a calcaneus insole on normal individuals on the Ground Reaction Force variables. Method: The experiment used ten adults (31.9 ± 6,7 years, 65.9 ± 15.4 kg and 1.7 ± 0.1 m) and registered no apparent changes in gait or pathologies that have an effect on the locomotor system. The following gait conditions were analyzed and compared: barefoot, using a sport shoe, and using the sport shoe with insole. The variables analyzed were vertical, medial lateral, and anterior-posterior dynamic ground reaction forces. An ANOVA one-way was used in order to compare the three different conditions. Statistically significant differences were revealed between the conditions of barefoot and sport shoe with insole for the vertical GRF during initial contact Fz1 (F2,59 = 3.4; p < 0.0406) and for the GRF anterior-posterior in the terminal stance phase Fy2 (F2,59 = 3.63; p < 0.0332). Results: These results indicated that the use of an insole increased the vertical impact on the locomotor system during the response to load phase, probably because of its greater stiffness compared to the barefoot or sport shoe trials. The insole also changed the GRF anterior-posterior during the terminal stance that corresponded with the acceleration/propulsion gait phase. Conclusion: Just based on the analysis of the dynamic variables, it was concluded that the use of insoles did not induce any significant increase in lateral forces that would indicate the reduction of excessive pronation or supination during the response load phase. The use of an insole produced a significant dynamic effect on the pronation/supination only in the propulsive gait phase.

Lower extremity kinematics in children with and without flexible flatfoot: a comparative study

BackgroundA high percentage of young children present with flatfeet. Although the percentage of those with flatfeet declines with age, about 15% of the population maintains a flat arch. A reduction in longitudinal arch height usually combines with excessive subtalar joint pronation and may be related to other musculoskeletal problems of the lower extremity kinetic chain. The purpose of this study is to describe and compare the lower extremity kinematics between children with normal arches and those with flexible flatfeet, with the intent of providing practical information for decision making when treating children with flexible flatfeet.MethodsTwenty children with flexible flatfeet (years age mean (SD), 9.7 (0.9) years) and 10 children with normal arches (yeas age mean (SD), 9.6 (1.2) years) were included. Kinematic data (maximum and minimum angles, and movement range, velocity, and excursion) of the hip, knee and rearfoot were collected during walking using Liberty Electromagnetic Tracking System. Kinematic variables were compared between the normal arches and flexible flatfeet groups using repeated measures mixed effects ANOVA.ResultsMovement patterns at the hip, knee and ankle joints were similar between children with flexible flatfeet and with normal arches. The results of ANOVA showed no significant main effect or interaction in any of the kinematic variables (P ≥ 0.05).ConclusionsThis study identified no kinematic adaptation during walking in children with flexible flatfoot. We suggested that future research should take the influence of the mid-foot and forefoot into consideration when examining lower extremity kinematics in children with flexible flatfoot.

The effect of different depths of medial heel skive on plantar pressures

BackgroundFoot orthoses are often used to treat lower limb injuries associated with excessive pronation. There are many orthotic modifications available for this purpose, with one being the medial heel skive. However, empirical evidence for the mechanical effects of the medial heel skive modification is limited. This study aimed to evaluate the effect that different depths of medial heel skive have on plantar pressures.MethodsThirty healthy adults (mean age 24 years, range 18–46) with a flat-arched or pronated foot posture and no current foot pain or deformity participated in this study. Using the in-shoe pedar-X® system, plantar pressure data were collected for the rearfoot, midfoot and forefoot while participants walked along an 8 metre walkway wearing a standardised shoe. Experimental conditions included a customised foot orthosis with the following 4 orthotic modifications: (i) no medial heel skive, (ii) a 2 mm medial heel skive, (iii) a 4 mm medial heel skive and (iv) a 6 mm medial heel skive.ResultsCompared to the foot orthosis with no medial heel skive, statistically significant increases in peak pressure were observed at the medial rearfoot – there was a 15% increase (p = 0.001) with the 4 mm skive and a 29% increase (p < 0.001) with the 6 mm skive. No significant change was observed with the 2 mm medial heel skive. With respect to the midfoot and forefoot, there were no significant differences between the orthoses.ConclusionsThis study found that a medial heel skive of 4 mm or 6 mm increases peak pressure under the medial rearfoot in asymptomatic adults with a flat-arched or pronated foot posture. Plantar pressures at the midfoot and forefoot were not altered by a medial heel skive of 2, 4 or 6 mm. These findings provide some evidence for the effects of the medial heel skive orthotic modification.

Extraosseous Talotarsal Stabilization Using HyProCure ® in Adults: A 5-year Retrospective Follow-up

The purpose of this retrospective study was to determine long-term functional outcomes and device tolerance achieved in adult patients who chose to undergo an extraosseous talotarsal stabilization procedure HyProCure ® for the treatment of flexible talotarsal joint deformity. Eighty-three adult patients participated in this study. Postoperative subjective assessment of device performance was evaluated using Maryland Foot Scores, which were collected at a mean follow-up period of 51 months. The mean postoperative Maryland Foot Score was 88 out of 100; postoperatively, 52% of cases reported complete alleviation of foot pain, 69% of cases had no limitations on their foot functional abilities, and 80% of cases reported complete satisfaction with the appearance of their feet. The implant was removed in 7 out of 117 cases (removal rate: 6%) due to prolonged pain of the anterior talofibular ligament (4 cases), psychogenic reaction (2 cases), and postoperative infection (1 case). The long-term positive subjective outcomes and excellent patient satisfaction obtained in this study may imply that extraosseous talotarsal stabilization was effective in stabilizing the talotarsal joint complex and eliminating excessive abnormal pronation, thus reducing pain and improving quality of life of the patients; it represents a possible treatment option for partial talotarsal dislocation in cases with flexible and reducible deformity.

Benefits of custom-made foot orthoses in treating patellofemoral pain

Patellofemoral pain is one of the most common disorders affecting the knee. Forefoot varus and excessive subtalar pronation can be associated with patellofemoral pain. Foot orthotics may produce an improvement in symptoms. The aim of this study was to test whether patellofemoral pain is improved after four weeks of using custom-made foot orthoses. Clinical trial without control group. Twenty-one subjects with patellofemoral pain were given custom-made foot orthoses (2-mm thick polypropylene and 4-mm thick polyethylene foam liner of 45 shore A hardness). Patellofemoral pain was evaluated with a visual analogue scale before applying the treatment, and at two weeks and four weeks follow-up. At the two-week check-up, a forefoot varus posting was added to the orthoses. Improvements in patellofemoral pain was significant in all comparisons: initial pain with pain at the two-week check-up (P < 0.001), initial pain with pain at four weeks (P < 0.001), and pain at two weeks with pain at four weeks (P < 0.001). The effect size was large in all comparisons. For the participants in this study, the custom-made foot orthoses were found to be an effective conservative treatment to reduce the symptoms of patellofemoral pain.

Effect of Extra-osseous Talotarsal Stabilization on Posterior Tibial Tendon Strain in Hyperpronating Feet

Posterior tibial tendon dysfunction is considered one of the most common causes of progressive adult acquired flatfoot deformity. The etiology leading to the dysfunction of posterior tibial tendon remains controversial. The purpose of this study was to quantify strain on the posterior tibial tendon in cadaver feet exhibiting hyperpronation caused by flexible instability of the talotarsal joint complex. We hypothesized that posterior tibial tendon strain would decrease after a minimally invasive extra-osseous talotarsal stabilization procedure. A miniature differential variable reluctance transducer was used to measure the elongation of posterior tibial tendon in 9 fresh-frozen cadaver specimens. The elongation was measured as the foot was moved from its neutral to maximally pronated position, before and after intervention with the HyProCure ® extra-osseous talotarsal stabilization device. The mean elongation of the posterior tibial tendon (with respect to a fixed reference point) was found to be 6.23 ± 2.07 mm and 3.04 ± 1.85 mm, before and after intervention, respectively (N = 27; variation is ± 1 SD). The average elongation reduced by 51% and was statistically significant with p < .001. Strain on the posterior tibial tendon is significantly higher in hyperpronating feet. An extra-osseous talotarsal stabilization procedure reduces excessive abnormal elongation of the posterior tibial tendon by minimizing excessive abnormal pronation. This minimally invasive procedure may thus provide a possible treatment option to prevent or cure posterior tibial tendon dysfunction in patients exhibiting flexible instability of the talotarsal joint complex.

Stabilization of Joint Forces of the Subtalar Complex via HyProCure Sinus Tarsi Stent

The foot is the foundation of the body. The stability of the osseous hindfoot structure is crucial in bipedal locomotion. The subtalar joint is responsible for conversion of the rotatory forces of the lower extremities and dictates the movements of the midtarsal joints and the forefoot. In a hyperpronated foot, excessive abnormal pronation results in partial to full obliteration of the sinus tarsi. The hypothesis is that the HyProCure device will prevent obliteration of the sinus tarsi, thereby stabilizing the subtalar joint complex and eliminating the excessive forces to the proximal and distal musculoskeletal system that occur with every step. Five fresh-frozen human foot cadaver specimens that represented pathologic hindfoot and midfoot instability and partial to full obliteration of the sinus tarsi were axially compressed to 2,000 N and internally rotated by 15° to produce maximum pronation of the subtalar joint using a biaxial materials testing machine. The forces were measured across the posterior and anterior talocalcaneal joint facets before and after placement of the HyProCure stent. The subtalar joint stabilized after placement of the HyProCure sinus tarsi stent. The mean ± 1 SD forces in the posterior talocalcaneal joint increased from 795.88 ± 106 N to 1,004.86 ± 72.41 N (P < 0.05, two-tailed paired t test). The mean ± SD forces at the anterior talocalcaneal joint decreased from 520.15 ± 127.18 N to 394.56 ± 73.83 N (P < 0.05), shifting the contact area posteriorly. Placement of the HyProCure subtalar stabilization stent in a hyperpronated foot prevents excessive talar subluxation and assists in proper distribution of the axial loads on the subtalar facet joints.

Effects of motion control footwear on running: A systematic review

Excessive foot pronation is a risk factor of running injuries and motion control footwear is designed to control foot pronation. With the movement transfer between foot pronation and tibial rotation, motion control footwear may not only be confined to controlling foot pronation. In view of the controversies in the literature on effectiveness of motion control footwear, this paper reviewed the efficacy of motion control footwear functions as reported in the literature. Eligible studies were identified from seven electronic databases. Two independent authors extracted the data and assessed the methodological qualities using the Jadad Scale. A total of 14 quasi randomised controlled trials were included. Even though the included studies were rated as “low quality” according to the Jadad Scale, the data were pooled and analysed. Results revealed that motion control footwear was effective in reducing the amount of foot pronation and the peak vertical impact during landing. There is no evidence that suggests motion control footwear for controlling kinematics of the proximal segments.

Radiographic Evaluation of Navicular Position in the Sagittal Plane—Correction Following an Extraosseous Talotarsal Stabilization Procedure

The navicular drop in the sagittal plane on weight-bearing is a valid indicator of foot pronation. Dislocation of the talus on the tarsal mechanism results in hyperpronation, which can lead to excessive navicular drop. The purpose of the present study was to radiographically determine the efficacy of HyProCure ® in realigning the navicular bone in hyperpronating feet. We hypothesized that following the placement of HyProCure ®, the navicular height would increase significantly compared to its preoperative value. Radiographs of 61 adult patients (86 feet) who received HyProCure ® without adjunctive hindfoot or midfoot soft tissue or osseous procedures were analyzed. The distance of the navicular with respect to the cuboid was measured from the pre- and postoperative weight-bearing lateral radiographs. Additionally, we measured foot length to normalize the navicular to cuboid distance. The postoperative radiographs were taken at an average follow-up of 17 days. The mean preoperative true navicular to cuboid distance was 19 ± 6 mm as compared to a mean postoperative value of 24 ± 5 mm. The mean pre- and postoperative normalized navicular to cuboid distances were 0.098 ± 0.029 and 0.125 ± 0.027, respectively (± 1 SD). The postoperative increase in the true and normalized navicular to cuboid distance was statistically significant ( p < .001). HyProCure ® was effective in improving the anatomic alignment of the talonavicular joint by reducing excessive navicular drop. This indicates reduction of excessive abnormal pronation and stabilization of the medial column of the foot, which can also lead to reduction in the excessive forces placed on the supporting soft tissue structures.

The association between runners' lower limb alignment with running-related injuries: a systematic review

BackgroundAlthough running is one of the most popular sports in the world, there are few studies that describe the relationships between anatomic characteristics of lower limb in this population.ObjectiveTo systematically...

Pronação excessiva e varismos de pé e perna: relação com o desenvolvimento de patologias músculo-esqueléticas - revisão de literatura

A literatura propõe mecanismos biomecânicos que relacionam a pronação subtalar excessiva ao desenvolvimento de diversas patologias músculo-esqueléticas. A presença dos desalinhamentos anatômicos antepé varo, retropé varo e tíbia vara pode levar à ocorrência da pronação subtalar excessiva. Entretanto, não existe um consenso sobre a contribuição do padrão de movimento e da presença desses desalinhamentos para o desenvolvimento de patologias. O objetivo deste estudo foi realizar uma revisão da literatura para investigar a influência de varismos aumentados de antepé, retropé e tíbia e da pronação subtalar excessiva no surgimento de patologias músculo-esqueléticas. Foi realizada uma pesquisa bibliográfica sistematizada nas bases Medline, ISI - Web of Science, Lilacs e Scielo, tendo sido selecionados 13 estudos analíticos. Do total de 13 estudos, 10 encontraram associação de patologias no membro inferior com um ou mais dos desalinhamentos anatômicos analisados ou com um ou mais parâmetros cinemáticos relacionadas à pronação subtalar excessiva. A análise dos estudos sugere que a pronação subtalar excessiva e/ou a presença de desalinhamentos que podem levar a esse padrão de movimento são possíveis fatores de risco para o desenvolvimento de patologias músculo-esqueléticas no membro inferior.

The effects of enhanced plantar sensory feedback and foot orthoses on midfoot kinematics and lower leg neuromuscular activation

Excessive foot pronation has been associated with injuries of the lower extremity. No research has investigated the effect of enhancing plantar sensory feedback on foot pronation. The aim of this study was to determine whether a shoe with enhanced plantar sensory feedback reduces midfoot pronation. Midfoot kinematics and electromyography of the peroneus longus, tibialis anterior and medial gastrocnemius of 21 males (age: 21.0±4.0 years, height: 176.8±5.0cm, mass: 73.3±6.5kg) were recorded whilst walking in a neutral shoe, a neutral shoe with a prefabricated foot orthotic and a neutral shoe with nodules located on the plantar-medial insole (experimental shoe). Friedman's ANOVA and Wilcoxon tests were used to evaluate differences between shoe conditions. Mean midfoot-tibia angles during ground contact were significantly more supinated when wearing the experimental shoe (+7.14°, p=0.023) or orthotic (+3.83°, p=0.006) compared to the neutral shoe. During the loading phase, midfoot angles were significantly more supinated when wearing the experimental shoe compared to the orthotic (+5.53°, p=0.008) or neutral shoe (+6.20°, p=0.008). In the midstance phase, midfoot supination was significantly higher in the orthotic compared to the neutral shoe (+2.79°, p=0.006). Finally, supination was increased during the propulsive phase when wearing the experimental shoe compared to the orthotic (+7.43°, p=0.010) or neutral shoe (+10.83°, p=0.009). No significant (p<0.05) differences in muscle activation were observed. These results suggest that increasing plantar sensory feedback to the medial aspect of the foot reduces midfoot pronation during an acute bout of walking. Further work is needed to explore whether these effects remain over longer time periods.

Hallux Limitus y su relación con el pie pronado como factor etiológico

The first metatarsophalangeal joint is very important in the propulsive phase of gait, hence the importance of biomechanics. It is therefore very important to study the conditions affecting this joint. One of the pathologies that occur over the first metatarsophalangeal joint is hallux limitus, therefore the importance of better understanding their clinical stages, and etiology, especially the etiologic factors of biomechanical origin as overpronation, as is the most common is. Therefore, this article seeks to make a literature review and confirm whether the excess pronation is a cause of hallux limitus.

Acute effects of a shoe with enhanced plantar sensory feedback on midfoot kinematics whilst walking

Background Excessive foot pronation has been associated with injuries of the lower extremity. No research has investigated the effect of altering plantar sensation on foot pronation. The aim of this study was to determine whether a shoe with enhanced plantar sensory feedback could reduce midfoot pronation. Methods The midfoot kinematics of 21 males were recorded whilst walking in a neutral shoe, a neutral shoe with a foot orthotic and a neutral shoe with nodules located on the plantar medial aspect of the foot (experimental shoe). Electromyography of the peroneus longus, tibialis anterior and medial gastrocnemius was also recorded and analysed. A Friedman’s ANOVA was used to evaluate differences between shoe conditions, and a Wilcoxon signed ranks test was conducted to establish where the differences occurred. Results The results demonstrated that midfoot-tibia angles were significantly more supinated during the loading phase when wearing the experimental shoe (median = 47.70°) than when wearing a neutral shoe (median = 41.50°; p =0.008) or a neutral shoe with a foot orthotic (median =42.17°; p=0.008). In the midstance phase, supination angles in both the orthotic and experimental shoes were higher than that of the neutral shoe, with the former reaching significance (median = 19.56°; p = 0.006). During the propulsive phase findings were similar, with a significantly more supinated position in the experimental shoe (median = 48.30) than the neutral shoe (median = 37.47°; p = 0.006) or the neutral shoe with a foot orthotic (median = 40.87°; p=0.010). No significant differences were observed for any muscle group at any stage of the gait cycle. Conclusions Increasing plantar sensory feedback to the medial aspect of the foot reduces midfoot pronation during an acute bout of walking.this may have important implications in relation to our prescription of both athletic footwear and orthotic devices. Further work is needed to explore whether these effects remain over longer time periods.

Kinematics associated with foot pronation in individuals with patellofemoral pain syndrome: a case‐control study

Background Excessive foot pronation during gait is frequently linked to patellofemoral pain syndrome (PFPS) development, due a proposed coupling of increased foot pronation with increased tibial and femoral internal rotation. However, there is a paucity of research which has compared kinematics associated with foot pronation between individuals with PFPS and controls. The aim of this study was to compare forefoot, rearfoot and tibial kinematics associated with foot pronation between individuals with PFPS and controls.

The Effect of HyProCure ® Sinus Tarsi Stent on Tarsal Tunnel Compartment Pressures in Hyperpronating Feet

Tarsal tunnel syndrome is characterized by increased pressure in the tarsal tunnel. In hyperpronation, there is excessive abnormal pronation resulting from partial displacement of the talus on the calcaneus. In this study, we hypothesized that hyperpronation caused by talotarsal instability will lead to increased pressure in the tarsal tunnel and porta pedis. We also hypothesized that the pressure in these compartments will decrease following an extra-osseous talotarsal stabilization procedure using HyProCure ®. Pressures in the tarsal tunnel and porta pedis were measured in 9 fresh-frozen cadaver specimens using an intracompartmental pressure monitor system. Pressures were measured with the foot in neutral and hyperpronated position, before and after stabilization using HyProCure. For the tarsal tunnel, pressure in the neutral position with and without HyProCure was 3 ± 3 mm Hg and 4 ± 3 mm Hg, respectively ( P = .159). However, for the hyperpronating foot, the pressure decreased from 32 ± 16 mm Hg to 21 ± 10 mm Hg ( P < .001) following the placement of HyProCure. In the porta pedis, pressure in the neutral position with and without HyProCure was 2 ± 2 mm Hg and 2 ± 2 mm Hg, respectively ( P = .168). However, for the hyperpronating foot, the pressure decreased from 29 ± 15 mm Hg to 18 ± 11 mm Hg ( P < .001) following the placement of HyProCure. The pain caused by compression of the posterior tibial nerve in the tarsal tunnel and its branches in the porta pedis, owing to hyperpronation, may be alleviated by implantation of HyProCure.