Foot Arch Research Articles

USO DE TERAPIAS MANUAIS NA REABILITAÇÃO DA FASCITE PLANTAR: UMA REVISÃO SISTEMÁTICA.

Fasciitis is an inflammation of the plantar fascia, a structure that helps support the medial arch of the foot and is designed to absorb much of the impact. Plantar fasciitis can result from a number of factors, including excessive stress and overload, which can result in inflammation, stress fractures of the calcaneus, compressive neuropathy of the plantar nerves, and more. The aim of this study is to to elucidate how manual therapies can be effective in the treatment of plantar fasciitis. In its preparation, a literature review was carried out to evaluate the effectiveness or not of manual therapies in the treatment of plantar fasciitis, the databases used were: Pubmed, SciElo and PEDro , in Portuguese and English, in the period from January 2019 to December 2024. Ten studies were included to be analyzed in this systematic review, and it showed that manual therapy provides significant benefits, such as reducing pain and improving the function of patients with plantar fasciitis. In conclusion, this study offers valuable insight into how an integrated approach can benefit patients with plantar fasciitis . The findings reinforce the need for personalized treatments, emphasizing that combining different modalities may be key to successful recovery. However, there have been few scientific articles on these manual techniques, so it is worth highlighting the importance of encouraging further studies.

The Relationship of Arcus Pedis Form with Running Speed in Markentho's Football Running Community at Manahan Stadium

Background: Running speed refers to a person's ability to perform consecutive movements to cover a distance in the shortest possible time. This speed is influenced by the arch of the foot (arcus pedis), which can be classified as low, high, or average, and functions as a shock absorber when the foot contacts the ground. Common deformities in abnormal foot structures include pes cavus and flat feet. Aim: To determine the relationship between the condition of the arcus pedis and running speed in the Anak Buah Markentho running community at Manahan Stadium. Methods: This research was conducted on 25 members of a running community. The normality test was performed using the Shapiro-Wilk test, and the hypothesis was tested using Spearman's correlation. Results: The analysis yielded a significance value of 0.000 (p < 0.05), indicating a significant correlation between the shape of the arcus pedis and running speed. The Spearman correlation coefficient was 0.691, showing a positive and strong correlation. Conclusion: Greater deviations in the arch shape are associated with lower running speed, demonstrating a significant and strong correlation. This suggests a clear relationship between the shape of the arcus pedis and running speed.

The Effect of Towel Toe Curl Exercise and Tibialis Posterior Strengthening on Dynamic Balance of Flatfoot Patients at SD Negeri 104242 Lubuk Pakam

Background: Improper use of the foot can cause problems when walking and even endanger a person's health. The arch of the foot helps withstand impact pressure and provides stability when standing or walking. Flatfoot is a deformity related to the foot, such as medial longitudinal arch disorders of the foot, valgus deformity of the heel, and forefoot abduction. The exercise methods that can be given to overcome flatfoot are Towel toe curl exercise and tibialis posterior strengthening. Purpose: to improve foot function by strengthening the intrinsic muscles of the foot. While tibialis posterior strengthening exercise is to strengthen the tibialis posterior muscle, which is part of the extrinsic muscle. Research method: This type of research is quantitative with a one group pre-test and post-test design. Data analysis using paired sample t-test. The sample of this study were children at SD Negeri 104242 Lubuk Pakam who suffered from flatfoot with a total of 22 samples. The intervention given was towel toe curl and tibialis posterior strengthening 3 times a week for 4 weeks with a total of 12 actions. Before the dynamic balance intervention, respondents were measured first (pretest) with the Y Balance Test (YBT) and re-measured after the intervention (Posttest). Results and discussion: The results of the paired sample t-test obtained a significant value (p) of 0.000, greater than the alpha value (a) (0.000 <0.05), meaning that there is a significant effect of towel toe curl exercises and tibialis posterior strengthening on improving dynamic balance in flatfoot children. Conclusion: Based on the results of the study, it can be concluded that towel toe curl exercises and tibialis posterior strengthening can be one of the training methods that can be applied to overcome dynamic balance disorders in flatfoot sufferers

ВЗАИМОСВЯЗЬ УТОЛЩЕНИЯ СВОДА СТОПЫ И РАЗВИТИЯ ЦНС У ДЕТЕЙ. (ОБЗОР ЛИТЕРАТУРЫ)

Today, the World Health Organization believes that musculoskeletal disorders in children occupy a leading position. According to statistics provided by Russian orthopedists over the past year, 24.2 - 67.3% of schoolchildren, depending on the region, have longitudinal or transverse flat feet. The second most common disorder in children is developmental disorders in the field of intellectual activity. Motor activity is a natural need for people to move. Intellectual development is understood as a set of various cognitive functions of an individual in society: from thinking, as well as perception, to the imagination and thinking of a person. Therefore, studying the relationship between the musculoskeletal and nervous systems in children is an important task of our time. The purpose of our study was to assess the relationship between thickening of the arch of the foot and the development of the central nervous system in children, through the prism of scientific works of orthopedists, pediatricians, neurologists and psychologists. Our review of the literature proves the importance of studying this problem and the need for a clinical study. To improve diagnostics, it is necessary to create a combined universal assessment system that will allow comparing results and conducting a mathematical analysis of the initial state of the musculoskeletal system and intellectual level in children, as well as to analyze changes in the course of therapy. Also, in our opinion, it is necessary to develop a set of exercises for therapeutic physical training that will not only strengthen muscles, form the arches of the feet, but also simultaneously train the frontal lobes of the brain, which will enhance concentration and develop memory. Therefore, we consider it necessary to expand the range and conduct extensive studies with a large sample size.

Research on the Construction Mechanics and Stability Control Technology of Expressway Tunnel Based on Numerical Analysis

As an effective structural form, connecting arch tunnel has been widely used in practical engineering because of its smooth linear shape, small footprint and good bridge and tunnel connection. With the increase of domestic traffic volume year by year, the width of the even arch tunnel is gradually changed from two-way four lanes to two-way six lanes. I20 I-steel, spacing 0.75∼1 m, anchor length 3∼4 m, ring spacing 0.5∼1 m, the side ring spacing of the middle wall is 0.75 m, the side ring spacing of the side wall is 1 m, and the shotcrete thickness is 0.25∼0.3 m. The excavation span of a two-way six-lane continuous-arch tunnel is considerable, leading to complex stress characteristics, thereby posing risks to construction safety and structural stability. Following the construction of the initial tunnel, disturbance to the surrounding rock occurs, affecting subsequent excavation phases. The initial support requirements for subsequent excavations are more intricate, with increased internal forces compared to the initial tunnel segment. As the rear tunnel progresses, the surrounding rock near the middle wall shifts towards the rear tunnel, reducing internal forces in the concrete and steel arch frame. However, as the rear tunnel distance increases, concrete stress and axial forces on the middle wall side of the initial tunnel begin to rise. Throughout the construction, the steel arch frame’s internal forces and spray concrete stress on the middle wall side’s arch waist and foot are the highest, making them susceptible to disruption from construction on the opposite side, thus constituting critical tunnel components. Numerical simulations effectively capture surrounding rock and structural stress dynamics during large-span arch tunnel construction. Simulation outcomes align closely with field measurements, particularly in three-dimensional simulations, enhancing construction understanding and management.

Research on the failure mechanisms and preventive actions of tunnels under butterfly load in loess regions

The results of surrounding rock pressure measurements from numerous loess tunnels exhibit a butterfly distribution pattern, subsequently referred to as ’butterfly load’. This pattern significantly deviates from the load distribution and magnitude—referred to as ’specification load’—calculated by current Chinese tunnel design specifications. By means of model experimental and numerical simulation, the mechanical behavior, failure cause, failure mechanism and preventive actions of tunnel structure under different load distribution are studied. The experimental results indicate that the ultimate bearing capacity of the tunnel structure under the butterfly load is significantly lower than that under the specification load, with the ultimate bearing capacity decreasing as load unevenness increases. The butterfly load increases the unevenness of the axial force distribution throughout the annular structure and also causes the structure to produce reverse moments in the vault and arch shoulder. Similarly, the morphological characteristics of the cracks show that the butterfly load most significantly influences the tunnel vault and arch shoulder. Under the influence of the butterfly load, the lining structure is prone to developing cracks at the arch shoulder and arch foot positions, with tensile cracks located at the vault position. Aiming at the failure mechanism of tunnel structure under butterfly load, it is suggested to implement advanced small conduit grouting at the tunnel arch to suppress the dislocation of the formation and to lay root piles at the arch foot to improve the bearing capacity of the tunnel bottom. The prevention effect of this technology in different loess regions is sandy loess > general loess > clay loess.

Research on the Evolutionary Law of Fracture Formation in Loose Seams Under High-Intensity Mining with Shallow Depth

The western mining regions of China, known for shallow-buried and high-intensity mining activities, face significant ecological threats due to damage to loose strata and the surface. The evolution of fissures within the loose layer is a critical issue for surface ecological environment protection in coal mining areas. The study employed field measurements, mechanical experiments, numerical simulations, and theoretical analysis, using the ‘triaxial consolidation without drainage’ experiment to assess the physical and mechanical properties of various strata in the loose layer. Additionally, the PFC2D numerical simulation software was employed to construct a numerical model that elucidates the damage mechanisms and reveals the evolution of loose layer fissures and the development of ground cracks. The research findings indicate that during shallow-buried high-intensity mining loose layer fissures undergo a dynamic evolution process characterized by “vertical extension-continuous penetration-lateral expansion”. As the working face advances, these fissures eventually propagate to the surface, forming ground cracks. The strong force chains within the overlying rock (or soil) layers develop in the form of an “inverted catenary arch”. As the arch foot and the middle of the arch overlap, fissures propagate along these strong force chains to the surface, resulting in ground cracks. The study elucidates the surface damage patterns in shallow-buried, high-intensity mining, offering theoretical insights for harmonizing coal mining safety with ecological conservation in fragile regions.

Contribution of the plantar fascia and long plantar ligaments to the stability of the longitudinal arch of the foot

The contribution of the Plantar Fascia (PF) and Long Plantar Ligament (LPL), two ligaments extending from the hindfoot to the forefoot, to arch stability has been studied in the past using in vivo, in vitro, and in silico methodologies. In silico studies were based on one single model obtained from one single subject and did not account for the known inter-subject morphological and biomechanical variations. In the present study, we developed computational dynamic models of nine different legs obtained from nine different individuals to evaluate the role of the LPL and PF in arch support, accounting for biological differences between subjects. These models were validated by comparing the simulation results against experimental results from the corresponding cadaver legs. After validation, we simulated body weight conditions for each model by applying a vertical load to the tibia, starting from zero and increasing linearly to 720 N. Kinematic and dynamic parameters, including the variation of the medial arch angle and of the navicular height, as well as the passive forces developed by the LPL and PF, were used to evaluate the contribution of these ligaments to arch support under body weight. The results indicate that a total collapse of the medial longitudinal arch occurred only when both the LPL and PF were absent, but a stable arch was maintained when either one of these two ligament structures were present. The results varied significantly among the specific models, highlighting the importance of using multiple models to account for inter-subject morphological differences.

ArchCheck Tool: An Innovative Instrument to Measure Arch Height

BACKGROUND Pes planus, commonly known as flat foot is a deformity of the foot, characterized by loss of the medial longitudinal arch of the foot. There are several diagnostic methods available, such -as radiographs and digital footprint scanning techniques, that involve the usage of ink, dyes, and expensive instrumentation which may be harmful and not readily available at all time. The arch height may prove to be a user-friendly, portable, and affordable means of grading the foot. However, no tools were found during the search for review of literature. Hence, a need for a tool to measure the arch height and further give standard range of the arch height for flat feet and non-flat feet was identified. OBJECTIVE To design a tool and further provide values to differentiate flatfoot and non-flatfoot using arch height as a measurement tool. RELEVANCE The instrument was designed to quantify arch height and values to differentiate flatfoot and non-flatfoot are provided by comparison with Chippaux Smirak Index (CSI). METHOD The study evaluated the medial longitudinal arches of 30 individuals (60 feet) using static footprints and arch height measurement with tool. The footprints were classified into flatfoot and non-flatfoot using CSI. Data was subjected to appropriate statistical analysis. RESULTS The range of medial longitudinal arch height between 15-21mm in sitting position and 13-19 mm in standing position identified with non-flat foot, while the range of medial longitudinal arch height between 10-14 mm in sitting position and 8-12 mm in standing position identified with flat foot when compared with CSI. These findings suggest that the tool can be used effectively to measure the medial longitudinal arch height and differentiate between individuals with flat foot and non-flat foot. CONCLUSION The study concludes that the tool is effective in measuring the medial longitudinal arch height and can be used to differentiate between individuals with flat foot and non-flat foot. Designers of the tool would like to name the tool as ArchCheck Tool.

Study of correlation between arches of foot and lower back pain in Eastern India

Background: Low back pain is one of the most common disorders of the musculoskeletal system, leading to impaired function and decreased quality of life in many patients. Foot arch alterations may lead to structural changes and/or affect its load distribution. It should be noted that even slight elevations of the foot’s medial longitudinal arch above the norm may lead to changes in load and pressure distribution. Hence, it becomes important to find the relationship between low back pain and altered foot arch indices leading to improper body balance. Aims and Objectives: The aims and objectives of the study are to find any correlation between lower back pain and an altered foot arch index in the Eastern Indian population. Materials and Methods: A total of 60 subjects aged 20–40 years with varying degrees of low back pain were selected. Low back pain scores of the subjects were found using modified oswestry low back pain disability questionnaire. Footprints in standing position using ink were taken on graph paper and the foot arch indices were calculated. Results: 54.16% of the male and 36.11% of female participants had low arched feet, 20.83% of male and 52.78% of female participants had normal arched feet, and 25% of male and 11.11% of female participants had high arched feet with varying degrees of low back pain. 77.42% of the participants with minimal disability due to low back pain were having normal arched feet, 71.43% of the participants with moderate disability due to low back pain were having low arched feet, and 100% of the participants with severe disability due to low back pain were having either high or low arched feet. Conclusion: This study showed that people having either low or high arched feet are at an increased risk of developing acute or chronic low back pain at some stage in their lives. Knowledge of this risk factor might even help people to choose appropriate occupations in the future.

Effects of the excavation of deep foundation pits on an adjacent double-curved arch bridge

The excavation of deep foundation pits can cause variations in the displacement and stress fields of surrounding soils, which hence induces adverse effects on adjacent structures. This study presents a two-stage method to quantify the impact of the excavation of a deep foundation pit on the adjacent double-curved arch bridge in the historical city of Nanjing, Southeastern China. The entire process of the foundation pit excavation was simulated and the induced deformation of the arch foot was obtained in the first stage by hardening soil model with small-strain stiffness. Then, the obtained deformation of the arch foot was applied to the bridge structure as a displacement boundary in the second stage to calculate the internal forces and deformations of the double-curved arch bridge structure. The tensile strength of concrete is taken as the limit value of the tensile stress of the double-curved arch bridge. The limit values of arch foot displacement under four evaluation conditions are obtained by step loading calculation. The present results provide construction guidance and safety warning for the process of foundation pit excavation adjacent to double-curved arch bridges for historical preservation.

Effectiveness of Neuromuscular Taping on Balance, Proprioception, Pain, and Nerve Conduction Parameters in Patients with Diabetic Peripheral Neuropathy: A Two-Group Pretest–Posttest Randomized Sham-Controlled Trial: A Pilot Study

Abstract Aim: Neuromuscular Taping (NMT) is the application of elastic adhesive tape to the skin without any tension in it. NMT creates wrinkles on the surface of the skin to help stretch the skin passively and this elongation force assists in muscle contraction and relaxation. Therefore, this study aimed to assess the effectiveness of NMT in the improvement of sensorimotor complications following diabetic peripheral neuropathy (DPN). Setting and Design: A randomized controlled trial performed at a tertiary health care center. Materials and Methods: A total of 20 participants were recruited and were divided into two groups: The experimental group (EG; N = 10) and the control group (CG; N = 10). Eight weeks of physiotherapy intervention including NMT on bilateral tibialis anterior, tibialis posterior, peroneus longus muscles, transverse arch of the foot, and transcutaneous electrical nerve stimulation (TENS) on the course of bilateral tibial and peroneal nerves for EG. CG received sham taping and TENS as an EG group. The patients were assessed for pre- and post-intervention using the outcomes: Leeds Assessment of Neuropathic Signs and Symptoms and nerve conduction velocity of tibial, peroneal, and sural nerves and H-reflex, Berg Balance Scale, and Pedalo-Sensamove Mini Board. Results: The results revealed that both the groups showed significant improvements in all variables except for the H-reflex of the right and left sides at P > 0.05. EG showed more clinical and symptomatic improvement compared with CG. In EG, most of the variables showed moderate to large effect sizes ranging from 0.66 to 0.97 except for bilateral H-reflex; ranging from 0.15 to 0.33. Conclusion: This study concludes that NMT can be a trustworthy approach to treating DPN.

Use of postural insoles to correct dynamic knee valgus in youth soccer players: a randomized, controlled, double-blind clinical trial

Introduction: Altered alignment of the lower limb promotes dynamic knee valgus (DKV), the foot pronacion is among the injuries associated with DKV and is less studied, as well as their treatment through postural insoles which generate elevation of the medial longitudinal plantar arch of the foot. Objective: To analyze the effect of using a postural insole in correcting DKV in young soccer players. Materials and Method: The following parameters were analyzed: the frontal plane projection angle (FPPA) of the knee by video capture during the lateral step down and the center of pressure excursion index (CPEI) by Computerized Baropodometric Analysis. The sample was randomly divided into 2 groups: Corrective Postural Insole Group (CPIg) and Placebo Postural Insole Group (PPIg). Results: The repeated measures Anova showed significant differences with an increase between the means obtained in the FPPA (P=0.002) and CPEI (P=0.034) assessments of the PPIg group. The means of the evaluations in the CPIg were significant, with an increase for the FPPA (P=0.003), and not significant for the CPEI (P=0.793), but the Bonferroni adjustment showed a significant increase in the means of the FPPA between Ev1 x Ev3 (difference: 6.22º; P=0.001) in PPIg; and between Ev1 x Ev3 (difference: 6.86º; P=0.016) and Ev2 x Ev3 (difference: 4.14º; P=0.015) in the CPIg. Conclusion: The findings allow us to conclude that the use of postural insoles with 5º corrective shims was not effective in reducing DKV, since the PPIg (which did not use corrective shims) also showed the same increase in FPPA.

A method for analysing the dynamic response of a CWSLT under rainfall and earthquake

ABSTRACT In typical engineering applications of loess tunnels, rainfall has a significant influence on the loess mass of tunnels. In order to explore the influence of rainfall seepage on the tunnel dynamic response, this paper takes the common curved wall section loess tunnel (CWSLT) as an example, employs the finite element method (FEM), considers the effects of earthquakes and rainfall seepage, the CWSLT models are established and the shaking table test was carried out, the variation laws of stress, displacement, and acceleration of the CWSLT under different buried depths, rainfall amounts and earthquake types (near-field with pulse, near-field without pulse) are studied. The results show that with the increase of rainfall, the lining stress increases and the tensile stress in the middle of the inverted arch of the tunnel lining structure increases; Under different earthquakes, the maximum stress of the tunnel appears at the arch foot and the midpoint of the inverted arch; With the increase of buried depth, the settlement displacement of loess tunnel increases gradually. The above research results have important guiding significance for the design and construction of loess tunnels.

Mechanical drivers of intrinsic foot muscle for maximum toe flexor strength in upright standing across different body size

This study aimed to evaluate maximum toe flexor strength, foot arch height, intrinsic toe flexor muscle size and foot arch stiffness among individuals with different body sizes, and to compare these variables between sitting and standing positions. Maximum toe flexor strength in sitting and standing, and intrinsic foot muscle thicknesses (flexor hallucis brevis: FHB, flexor digitorum brevis: FDB, abductor hallucis: AH and quadratus plantae: QP), were measured using a toe grip dynamometer and a B-mode ultrasound in healthy young men. FHB was thicker than AH, FDB and QP, AH was thicker than FDB and QP, and no significant difference was found between FDB and QP. Toe flexor strength was correlated with FHB and AH, and foot arch height was correlated with FHB. Toe flexor strength was greater in standing than in sitting. Stepwise multiple regression analysis identified FHB and AH as determinants of toe flexor strength in standing, and the relative muscle strength values per body weight in standing were determined by QP, foot arch index and foot arch stiffness. Overweight individuals had a decreased rate of increase in relative toe flexor strength compared to normal individuals. These results suggest that a large muscle thickness of intrinsic foot muscle a key contributor to toe flexor strength. Moreover, toe flexor muscle in upright standing could have the potential to generate force independently of intrinsic foot muscle size, but obese individuals who chronically put weight on their feet might impair the force amplification mechanism in upright standing.

Application of FBG Sensing Technology for Real-Time Monitoring in High-Stress Tunnel Environments

In the process of tunnel construction, problems such as high-stress rockburst, large deformation of soft rock, water inrush and mud gushing, secondary cracking of linings, blasting interference, man-made damage, and mechanical damage are often encountered. These pose a great challenge to the installation of monitoring equipment and line protection. In order to solve these problems, the 2# inclined shaft of Muzhailing Tunnel in the Gansu Province of China, which exists under high stress, water bearing, and bias conditions, was taken as the research object in this paper. By assembling a string, drilling grouting and sealing, and introducing multiple modes of protection, new fiber grating sensor group installation and line protection methods were proposed. The automatic continuous monitoring of the deep deformation of surrounding rock and the automatic continuous monitoring of steel arch stress were realized. The field monitoring results showed that: (1) the fiber grating displacement sensor group could be used to verify the authenticity of the surface displacement results monitored by the total station; (2) the NPR anchor cable coupling support effectively limited the large deformation of soft rock and the expansion of surrounding rock in a loose circle, and the range of the loose circle was stable at about 1 m; and (3) the main influence range of blasting was at a depth of 0~5 m in surrounding rock, and about 25 m away from the working face. In addition, to secure weak links in the steel arch due to the hardening phenomenon, a locking tube was set at the arch foot. In the support design, the fatigue life of the steel was found to be useful as the selection index for the steel arch frame to ensure the stability of the surrounding rock and the long-term safety of the tunnel. The present research adopted a robust method and integrates a variety of sensor technologies to provide a multifaceted view of the stresses and deformations encountered during the tunneling process, and the effective application of the above results could have certain research and reference value for the design and monitoring of high stress, water-bearing, and surrounding rock supports in tunnels.

A concise review of plantar fasciitis: Diagnosis, treatment, and management

Plantar fasciitis is one of the most common causes of heel pain, marked by inflammation of the plantar fascia, a thick connective tissue structure that supports the arch of the foot. This condition can substantially affect quality of life, limiting mobility and daily activities. This review aims to provide a thorough overview of plantar fasciitis, including its etiology, clinical presentation, diagnostic procedures, treatment options, and preventive measures. Emphasis is placed on evidence-based practices and current research trends in the management of this prevalent condition.

Study on Ground Motion Amplification in Upper Arch Bridge Due to “W”-Type Deep Canyon Using Boundary-Integral and Peak Frequency Shift Methods

The study of the dynamic response characteristics of “W”-type deep canyon terrain to double-span concrete arch bridges under earthquake action holds great practical significance. In this research, a bridge in Sichuan Province is taken as the object of study. The boundary-integral equation method and peak frequency shift method are combined to apply an embedded linear time–history analysis algorithm to the finite element spatial dynamic calculation model of the entire bridge, resulting in an improved model. By comparing these two methods with model test results, the seismic response characteristics of the middle part of a “W” concrete arch bridge under different foundation depths and seismic intensities are examined. The boundary integral equation method was utilized to calculate ground motion response at any point on site, revealing a significant amplifying effect of increased seismic wave intensity on acceleration response at the top of the arch bridge. When input seismic wave intensity increased from 0.1 g to 0.3 g, maximum acceleration at buried depths of 3 m and 8 m in the middle of the arch bridge foundation increased by 102.63% and 79.16%, respectively, indicating that shallow buried depth structures are more sensitive to seismic wave intensity. Furthermore, using peak frequency shift rules for analyzing seismic wave propagation characteristics in “W”-type deep canyon topography confirms the sensitivity of shallow buried depth structures to seismic wave intensity and reveals the mechanism through which topography influences seismic wave propagation. This study provides a helpful method for understanding the propagation law and energy distribution characteristics of seismic waves in complex terrain. It was observed that the displacement at the top of the arch bridge increased significantly with an increase in seismic intensity. When subjected to 0.1 g, 0.2 g, and 0.3 g EI-Centro seismic waves, the maximum displacement at the top of the arch bridge model with a foundation buried depth of 3 m was 8 mm, 32 mm, and 142 mm, respectively. For arch bridge models with an 8-m foundation buried depth, these displacements were measured at 6.2 mm, 21 mm, and 68 mm, respectively. The results from model tests verified that increasing the depth of foundation burial effectively reduces the displacement at the top of the structure. Furthermore, by combining a boundary-integral equation method and peak-frequency shift method, this study accurately predicted significant influences on W-shaped double deep canyon topography from seismic response, and successfully captured stress concentration and seismic wave amplification/focusing effects on arch foot structures. The calculated results from both methods align well with model test data which confirm their effectiveness and complementarity when analyzing seismic responses under complex terrain conditions for bridge structures.

Prevalence, causes, and treatment of plantar fasciitis in young females of a medical college

BackgroundPlantar fasciitis, a common musculoskeletal disorder, is characterized by inflammation of the plantar fascia, a thick band of tissue that connects the heel bone to the toes. The plantar fascia plays a crucial role in supporting the arch of the foot and absorbing shock during movement. Factors such as excessive physical activity, improper footwear, and biomechanical abnormalities are recognized contributors to the development of plantar fasciitis. However, the prevalence and underlying causes may vary across different demographic groups, necessitating targeted investigations.ObjectiveThis study aims to investigate the prevalence, causes and treatment of plantar fasciitis in young female students (18–30) of a medical college in Pakistan and explore potential associations with high-heel footwear.MethodologyIn this study, a cross-sectional survey was carried out, engaging 100 young females from a medical college. Employing a structured questionnaire, we assessed a spectrum of parameters, including heel pain symptoms, footwear habits, and available treatment options. The diagnostic precision of the Windlass test, specific to plantar fasciitis, was incorporated. Rigorous data analysis, utilizing SPSS, centered on discerning associations between the nuances of high-heel wear (considering types and duration) and the reported symptoms. This methodological framework ensures a comprehensive and precise exploration of the prevalence, causes, and treatment of plantar fasciitis in our targeted demographic.ResultsAll the participants were female, and the total number was 100, of which 66% felt pain in the heel when they wore high heels. Out of this 66%, only 6% are diagnosed with plantar fasciitis. The rest of the 60% have pain in the heel due to different causes such as heel spurs, stress fractures, etc. 2% of people receive treatment with steroid injections, and 12% are treated with ice.ConclusionWe conclude that the prevalence of plantar fasciitis is high in females wearing high heels. This study reveals that an increase in the total duration of wearing high heels with hard soles increases the symptoms of plantar fasciitis. Plantar fasciitis can be prevented by education and applying ergonomics and could be treated by steroids and the ice method, according to medical practitioners.

Investigation of soil arching in GRPS embankments under localized loading: Multi-span spring-based trapdoor model test

A novel multi-span spring-based trapdoor apparatus has been developed to simulate more realistically the coupling of piles, soft soil, and geosynthetics, as well as the intricate interactions between adjacent soil arches under localized loading within geo-reinforced pile-supported (GRPS) embankments. By employing movable blocks with varying spring stiffnesses, this study advances the understanding of the coupling effect between piles, soft soil, and geosynthetics. Utilizing digital image correlation (DIC) technology, the research captures the dynamic evolution of soil arch shapes, providing new insights into stabilization mechanisms within GRPS embankments. It is found that lateral geosynthetics can effectively reduce the overall settlement of the embankment and mitigate the influence of trapdoor stiffness on the soil arch height. The geo-reinforcement enhances the stability of soil arches under localized loading by providing essential support to the arch feet of multiple internal soil arches. Four distinct stages in soil arch evolution under localized loading have been identified. The relationship between geo-reinforcement stiffness and trapdoor stiffness in affecting soil arching is complex and varies with different loading scenarios. The membrane effect plays a pivotal role in inter-span load transfer.