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Hsu WK, Tie THA, Hsu WL, Chen YY. Minimally Invasive Chevron Akin (MICA) Osteotomy Corrects Radiographic Parameters but Not Central Metatarsal Loading in Moderate to Severe Hallux Valgus without Metatarsalgia. Life (Basel) 2024; 14:734. [PMID: 38929717 PMCID: PMC11204634 DOI: 10.3390/life14060734] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2024] [Revised: 05/30/2024] [Accepted: 06/05/2024] [Indexed: 06/28/2024] Open
Abstract
BACKGROUND Central metatarsal pressure is increased in patients with hallux valgus, but the pedographic outcomes after hallux valgus (HV) correction are inconclusive. No known literature has reported the pedographic outcomes after HV correction with Minimally Invasive Chevron and Akin Osteotomy (MICA). METHODS A prospective cohort of 31 feet from 25 patients with moderate-to-severe symptomatic HV but without metatarsalgia underwent MICA and was evaluated using radiographic parameters and pedographic measurements (Footscan®, RSscan International, Olen, Belgium). Data were collected preoperatively and 3 months after surgery. RESULTS The radiographic parameters of the hallux valgus angle, intermetatarsal angle, distal metatarsal articular angle, first metatarsal head lateral shape, and lateral sesamoid grade significantly improved after MICA. The corrected first metatarsal length was significantly shortened by 2.3 mm, with consistent second metatarsal protrusion distance, lateral Meary's angle, and calcaneal pitch angle. Max force, max pressure, cumulative force, and cumulative pressure on the central metatarsals did not show significant changes between pre- and post-operative measurements, while these parameters significantly decreased in the hallux and first metatarsal area. CONCLUSION MICA effectively corrects radiographic parameters but does not reduce central metatarsal loading in patients with moderate-to-severe HV without metatarsalgia.
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Affiliation(s)
- Wei-Kuo Hsu
- Department of Orthopaedic Surgery, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan 701, Taiwan; (W.-K.H.); (T.-H.A.T.)
| | - Tung-Hee Albert Tie
- Department of Orthopaedic Surgery, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan 701, Taiwan; (W.-K.H.); (T.-H.A.T.)
| | - Wei-Li Hsu
- School and Graduate Institute of Physical Therapy, College of Medicine, National Taiwan University, Taipei 100, Taiwan
| | - Yan-Yu Chen
- School and Graduate Institute of Physical Therapy, College of Medicine, National Taiwan University, Taipei 100, Taiwan
- Department of Orthopaedic Surgery, Show Chwan Memorial Hospital, Changhua 500, Taiwan
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Li W, Zou K, Guo J, Zhang C, Feng J, You J, Cheng G, Zhou Q, Kong M, Li G, Guo CF, Yang J. Integrated Fibrous Iontronic Pressure Sensors with High Sensitivity and Reliability for Human Plantar Pressure and Gait Analysis. ACS NANO 2024; 18:14672-14684. [PMID: 38760182 DOI: 10.1021/acsnano.4c02919] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2024]
Abstract
Flexible sensing systems (FSSs) designed to measure plantar pressure can deliver instantaneous feedback on human movement and posture. This feedback is crucial not only for preventing and controlling diseases associated with abnormal plantar pressures but also for optimizing athletes' postures to minimize injuries. The development of an optimal plantar pressure sensor hinges on key metrics such as a wide sensing range, high sensitivity, and long-term stability. However, the effectiveness of current flexible sensors is impeded by numerous challenges, including limitations in structural deformability, mechanical incompatibility between multifunctional layers, and instability under complex stress conditions. Addressing these limitations, we have engineered an integrated pressure sensing system with high sensitivity and reliability for human plantar pressure and gait analysis. It features a high-modulus, porous laminated ionic fiber structure with robust self-bonded interfaces, utilizing a unified polyimide material system. This system showcases a high sensitivity (156.6 kPa-1), an extensive sensing range (up to 4000 kPa), and augmented interfacial toughness and durability (over 150,000 cycles). Additionally, our FSS is capable of real-time monitoring of plantar pressure distribution across various sports activities. Leveraging deep learning, the flexible sensing system achieves a high-precision, intelligent recognition of different plantar types with a 99.8% accuracy rate. This approach provides a strategic advancement in the field of flexible pressure sensors, ensuring prolonged stability and accuracy even amidst complex pressure dynamics and providing a feasible solution for long-term gait monitoring and analysis.
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Affiliation(s)
- Wendong Li
- School of Aeronautics and Astronautics, State Key Laboratory of Polymer Materials Engineering of China, Robotic Satellite Key Laboratory of Sichuan Province, Sichuan University, Chengdu, 610065, People's Republic of China
| | - Kangkang Zou
- School of Aeronautics and Astronautics, State Key Laboratory of Polymer Materials Engineering of China, Robotic Satellite Key Laboratory of Sichuan Province, Sichuan University, Chengdu, 610065, People's Republic of China
| | - Junwei Guo
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering of China, Sichuan University, Chengdu, 610065, People's Republic of China
| | - Cancan Zhang
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering of China, Sichuan University, Chengdu, 610065, People's Republic of China
| | - Jiabao Feng
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering of China, Sichuan University, Chengdu, 610065, People's Republic of China
| | - Jia You
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering of China, Sichuan University, Chengdu, 610065, People's Republic of China
| | - Gang Cheng
- Beijing Key Laboratory of Intelligent Space Robotic Systems Technology and Applications, Beijing Institute of Spacecraft System Engineering, Beijing, 100094, People's Republic of China
| | - Qinghua Zhou
- School of Aeronautics and Astronautics, State Key Laboratory of Polymer Materials Engineering of China, Robotic Satellite Key Laboratory of Sichuan Province, Sichuan University, Chengdu, 610065, People's Republic of China
| | - Miqiu Kong
- School of Aeronautics and Astronautics, State Key Laboratory of Polymer Materials Engineering of China, Robotic Satellite Key Laboratory of Sichuan Province, Sichuan University, Chengdu, 610065, People's Republic of China
| | - Guangxian Li
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering of China, Sichuan University, Chengdu, 610065, People's Republic of China
| | - Chuan Fei Guo
- Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, Guangdong 518055, People's Republic of China
| | - Junlong Yang
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering of China, Sichuan University, Chengdu, 610065, People's Republic of China
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Rabal-Pelay J, Cimarras-Otal C, Lacárcel-Tejero B, Alcázar-Crevillén A, Villalba-Ruete JA, Berzosa C, Bataller-Cervero AV. Changes in Baropodometric Evaluation and Discomfort during the Workday in Assembly-Line Workers. Healthcare (Basel) 2024; 12:761. [PMID: 38610183 PMCID: PMC11011590 DOI: 10.3390/healthcare12070761] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2024] [Revised: 03/19/2024] [Accepted: 03/27/2024] [Indexed: 04/14/2024] Open
Abstract
Prolonged standing at work is associated with health risks. The appearance of lower-limb and lower-back discomfort is one of the most prevalent factors in prolonged standing workers. The aim of this research was to evaluate the effect of an eight-hour workday on foot pressure and musculoskeletal discomfort in standing workers. Thirty-six assembly-line workers (six women) were recruited to participate in a cross-sectional study to assess foot pressure and surface, foot, knee, and lower-back discomfort before and after a real workday. Baropodometry outcomes (surface and pressure) were evaluated by the pressure platform SensorMedica and musculoskeletal discomfort was evaluated by Cornell's Musculoskeletal Discomfort Questionaire. Total foot surface (p = 0.01) and foot discomfort (p = 0.03) increased significantly at the end of the workday. Prolonged standing during 8 h workday increased the foot discomfort and total foot surface in assembly-line workers. No foot pressure variable (forefoot, rearfoot, or total) was significantly modified after the workday in assembly-line workers.
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Affiliation(s)
- Juan Rabal-Pelay
- ValorA Research Group, Universidad San Jorge, Autovía A-23 Zaragoza-Huesca km 299, 50830 Villanueva de Gállego, Spain; (J.R.-P.); (C.B.); (A.V.B.-C.)
| | - Cristina Cimarras-Otal
- ValorA Research Group, Universidad San Jorge, Autovía A-23 Zaragoza-Huesca km 299, 50830 Villanueva de Gállego, Spain; (J.R.-P.); (C.B.); (A.V.B.-C.)
| | | | | | - José Antonio Villalba-Ruete
- BSH Electrodomésticos España S.A., Polígono Industrial La Cartuja Baja, Ctra. Castellón, km 6.300, Cartuja Baja, 50720 Zaragoza, Spain
| | - César Berzosa
- ValorA Research Group, Universidad San Jorge, Autovía A-23 Zaragoza-Huesca km 299, 50830 Villanueva de Gállego, Spain; (J.R.-P.); (C.B.); (A.V.B.-C.)
| | - Ana Vanessa Bataller-Cervero
- ValorA Research Group, Universidad San Jorge, Autovía A-23 Zaragoza-Huesca km 299, 50830 Villanueva de Gállego, Spain; (J.R.-P.); (C.B.); (A.V.B.-C.)
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Liu M, Kang N, Zhang Y, Wen E, Mei D, Hu Y, Chen G, Wang D. Influence of motor capacity of the lower extremity and mobility performance on foot plantar pressures in community-dwelling older women. Heliyon 2024; 10:e28114. [PMID: 38560666 PMCID: PMC10979215 DOI: 10.1016/j.heliyon.2024.e28114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2023] [Revised: 03/12/2024] [Accepted: 03/12/2024] [Indexed: 04/04/2024] Open
Abstract
Objectives To investigate the associations of motor capacity of the lower extremity and mobility performance in daily physical activities with peak foot plantar pressures during walking among older women. Methods Using the data collected among 58 community-dwelling older women (68.66 ± 3.85 years), Pearson correlation and multiple linear regression analyses were performed to analyze the associations of motor capacity of the lower extremity (the 30-s chair stand test, the timed one-leg stance with eyes closed, and the Fugl-Meyer assessment of lower extremity), mobility performance in daily physical activities (the average minutes of moderate to vigorous physical activity every day and the metabolic equivalents), and foot plantar pressures (peak force and peak pressure) with the age and body fat percentage as covariates. Results (1) The motor capacity of the lower extremity has higher explanatory power for peak foot plantar pressures compared with the mobility performance in daily physical activities. (2) Higher body fat percentage was positively associated with peak force and pressure, while a lower score on the Fugl-Meyer assessment of lower extremity was negatively associated with both of them. (3) The metabolic equivalents were positively associated with the peak force, while the 30-s chair stand test was negatively associated with it. Conclusions Mobility performance in daily physical activities can be significant predictors for peak foot plantar pressures among older women. The significant predictor variables include the Fugl-Meyer assessment of lower extremity, the 30-s chair stand test, and metabolic equivalents.
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Affiliation(s)
- Min Liu
- Institute of Population Research, Peking University, Beijing, 100871, China
| | - Ning Kang
- Institute of Population Research, Peking University, Beijing, 100871, China
| | - Yalu Zhang
- School of Social Welfare, Stony Brook University, New York, 11794, United States
| | - Erya Wen
- Department of Physical Education, Peking University, Beijing, 100871, China
| | - Donghui Mei
- Institute of Population Research, Peking University, Beijing, 100871, China
| | - Yizhe Hu
- Department of Physical Education, Peking University, Beijing, 100871, China
| | - Gong Chen
- Institute of Population Research, Peking University, Beijing, 100871, China
| | - Dongmin Wang
- Department of Physical Education, Peking University, Beijing, 100871, China
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Arin-Bal G, Livanelioglu A, Leardini A, Belvedere C. Correlations between plantar pressure and postural balance in healthy subjects and their comparison according to gender and limb dominance: A cross-sectional descriptive study. Gait Posture 2024; 108:124-131. [PMID: 38039867 DOI: 10.1016/j.gaitpost.2023.11.017] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Revised: 09/07/2023] [Accepted: 11/22/2023] [Indexed: 12/03/2023]
Abstract
BACKGROUND Lower extremity injuries rank among the most common injuries affecting young population, and numerous factors affect the outcomes of plantar pressure and balance assessment. RESEARCH QUESTION Does a correlation exist between plantar pressure and postural balance in healthy subjects and are there any difference in the results based on gender and limb dominance? METHODS This study involved thirty healthy recreationally active young adults (15 females, 15 males). Plantar pressures were analyzed using the MatScan Pressure Mat System, and postural balance was evaluated using Biodex Balance System. All assessments conducted under both static and dynamic conditions. Correlations were tested by Spearman Correlation Coefficient, and comparative tests were performed for gender and limb dominance. RESULTS Correlations were observed between plantar pressure parameters and balance scores, particularly in the dynamic conditions (p < 0.05). Gender-based differences were noted in plantar pressure parameters (p < 0.05), with females demonstrating improved balance stability scores. No significant differences were found based on limb dominance in plantar pressure and postural balance data (p > 0.05). SIGNIFICANCE This study provides valuable detailed insights into the existing literature concerning plantar pressure and postural balance assessments within the healthy population. A strong correlation was observed between plantar pressure and postural balance, and the comparisons of these assessments were affected by gender but not by limb dominance. These results could lead the way for better rehabilitation approaches by considering the correlations and differences across diverse populations.
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Affiliation(s)
- Gamze Arin-Bal
- Hacettepe University, Faculty of Physical Therapy and Rehabilitation, Ankara, Turkey.
| | - Ayse Livanelioglu
- Hacettepe University, Faculty of Physical Therapy and Rehabilitation, Ankara, Turkey
| | - Alberto Leardini
- Movement Analysis Laboratory, IRCCS Istituto Ortopedico Rizzoli, Bologna, Italy
| | - Claudio Belvedere
- Movement Analysis Laboratory, IRCCS Istituto Ortopedico Rizzoli, Bologna, Italy
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Cárdenas-Rodríguez MF, Paute-Tigre CG, Bueno-Palomeque FL. In-Field Recording of Six Biaxial Angles and Plantar Pressures in Weightlifting through a Wearable System. JOURNAL OF MEDICAL SIGNALS & SENSORS 2023; 13:290-299. [PMID: 37809018 PMCID: PMC10559295 DOI: 10.4103/jmss.jmss_61_22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Revised: 02/11/2023] [Accepted: 03/08/2023] [Indexed: 10/10/2023]
Abstract
Background Monitoring and evaluation of the techniques used in weightlifting are based on the subjective observation of the coach, which can ignore important aspects of short duration. This study aimed to implement an embedded system to register the angular variation of the hip, knee, and ankle joints, and plantar pressure during training. Methods Four professional and four amateur athletes performed five snatch lifts. To evaluate the angular measurement, the tests were simultaneously videotaped and the results were contrasted. Results The angular data presented a correlation coefficient of 0.92 and a delay of 495 ± 200 ms. The characterization of the sensors was implemented in a microcontroller with a mean absolute percentage error of 18.8% in the measurements. When comparing the average results between the elite and amateur groups, the amateur group performed a delayed descent in the first three phases of the lift and an accelerated descent in the fourth phase. A not uniform plantar pressure was registered in the same group, causing a reduction in the final speed of recovery with the barbell. Conclusions The proposed system has been developed for biaxial angular registration of hip, knee, ankle, and plantar pressure during weightlifting snatch. The option to contrast between signals presented by the system met the requirements requested by the coaching staff and is seen as a promising quantitative analysis tool to support the coach and the athlete.
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Tomac A, Ion AP, Opriș DR, Arbănași EM, Ciucanu CC, Bandici BC, Coșarcă CM, Covalcic DC, Mureșan AV. Ledderhose's Disease: An Up-to-Date Review of a Rare Non-Malignant Disorder. Clin Pract 2023; 13:1182-1195. [PMID: 37887082 PMCID: PMC10605618 DOI: 10.3390/clinpract13050106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Revised: 09/07/2023] [Accepted: 09/15/2023] [Indexed: 10/28/2023] Open
Abstract
Plantar fibromatosis (or Ledderhose's disease) is a rare benign condition, difficult to treat, defined by gradual-growing nodules in the central medial part of the plantar fascia, with the possibility of sclerosis and shrinkage of the entire fascia or, rarely, contractures of the toes. From a histopathological point of view, it is linked to Dupuytren's contracture of the hand and Peyronie's disease of the penis, being part of a large group of fibromatoses, based on a proliferation of collagen and fibroblasts. Its etiology is still not fully understood, even though it has been associated with trauma, diabetes mellitus, use of anticonvulsants, frozen shoulder, alcohol consumption, and liver disease. Typically, ultrasound confirms the diagnosis, and magnetic resonance imaging is used for more aggressive and advanced types. Several conservative treatment techniques, such as steroid injections, verapamil, imatinib, radiation therapy, extracorporeal shock wave therapy, tamoxifen, sorafenib, mitomycin C, and collagenase, have been documented. When non-operative care fails, surgical measures may be considered, even though recurrence is expected. We attempted to provide a better understanding of this disease by covering all of the important aspects: its history, clinical and radiologic findings, diagnosis, pathophysiology features, conservative and surgical treatment, recurrence rate, and prognosis.
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Affiliation(s)
- Alexandru Tomac
- Clinic of Plastic Surgery, Saint Spiridon Emergency Clinical Hospital, 700111 Iasi, Romania;
| | - Alexandru Petru Ion
- George Emil Palade University of Medicine, Pharmacy, Science, and Technology of Targu Mures, 540139 Targu Mures, Romania;
| | - Diana Roxana Opriș
- Emergency Institute of Cardiovascular Diseases and Transplantation (IUBCVT), 540139 Targu Mures, Romania;
| | - Eliza Mihaela Arbănași
- Faculty of Pharmacy, George Emil Palade University of Medicine, Pharmacy, Science, and Technology of Targu Mures, 540139 Targu Mures, Romania
| | - Claudiu Constantin Ciucanu
- Clinic of Vascular Surgery, Mures County Emergency Hospital, 540136 Targu Mures, Romania; (B.C.B.); (C.M.C.); (D.C.C.); (A.V.M.)
| | - Bogdan Corneliu Bandici
- Clinic of Vascular Surgery, Mures County Emergency Hospital, 540136 Targu Mures, Romania; (B.C.B.); (C.M.C.); (D.C.C.); (A.V.M.)
| | - Cătălin Mircea Coșarcă
- Clinic of Vascular Surgery, Mures County Emergency Hospital, 540136 Targu Mures, Romania; (B.C.B.); (C.M.C.); (D.C.C.); (A.V.M.)
| | - Diana Carina Covalcic
- Clinic of Vascular Surgery, Mures County Emergency Hospital, 540136 Targu Mures, Romania; (B.C.B.); (C.M.C.); (D.C.C.); (A.V.M.)
| | - Adrian Vasile Mureșan
- Clinic of Vascular Surgery, Mures County Emergency Hospital, 540136 Targu Mures, Romania; (B.C.B.); (C.M.C.); (D.C.C.); (A.V.M.)
- Department of Vascular Surgery, George Emil Palade University of Medicine, Pharmacy, Science, and Technology of Targu Mures, 540139 Targu Mures, Romania
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de Haan A, Hijmans JM, van der Vegt AE, van der Laan HP, van Nes JGH, Werker PMN, Langendijk JA, Steenbakkers RJHM. Effect of painful Ledderhose disease on dynamic plantar foot pressure distribution during walking: a case-control study. Foot (Edinb) 2023; 56:101990. [PMID: 36905795 DOI: 10.1016/j.foot.2023.101990] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/16/2023] [Revised: 02/23/2023] [Accepted: 02/27/2023] [Indexed: 03/13/2023]
Abstract
BACKGROUND Plantar pressure distribution during walking in patients with painful Ledderhose disease is unknown. RESEARCH QUESTION Do patients with painful Ledderhose disease have an altered plantar pressure distribution during walking compared to individuals without foot pathologies? It was hypothesized that plantar pressure is shifted away from the painful nodules. METHODS Pedobarography data of 41 patients with painful Ledderhose disease (cases, mean age: 54.2 ± 10.4 years) was collected and compared to pedobarography data from 41 individuals without foot pathologies (controls, mean age: 21.7 ± 2.0 years). Peak Pressure (PP), Maximum Mean Pressure (MMP) and Force-Time Integral (FTI) were calculated for eight regions (heel, medial midfoot, lateral midfoot, medial forefoot, central forefoot, lateral forefoot, hallux and other toes) under the soles of the feet. Differences between cases and controls were calculated and analysed by means of linear (mixed models) regression. RESULTS Proportional differences in PP, MMP and FTI showed increased values for the cases compared to the controls, especially in the heel, hallux and other toes regions, and decreased values in the medial- and lateral midfoot regions. In naïve regression analysis, being a patient was a predictor for increased- and decreased values for PP, MMP and FTI for several regions. When dependencies in the data were taken into account with linear mixed-model regression analysis, the increased- and decreased values for the patients were most prevalent for FTI at the heel, medial midfoot, hallux and other toes regions. SIGNIFICANCE In patients with painful Ledderhose disease, during walking, a shift of pressure was found towards the proximal and distal foot regions, while offloading the midfoot regions.
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Affiliation(s)
- Anneke de Haan
- University of Groningen, University Medical Center Groningen, Department of Radiation Oncology, Groningen, the Netherlands.
| | - Juha M Hijmans
- University of Groningen, University Medical Center Groningen, Department of Rehabilitation Medicine, Groningen, the Netherlands
| | - Anna E van der Vegt
- University of Groningen, University Medical Center Groningen, Department of Rehabilitation Medicine, Groningen, the Netherlands
| | - Hans Paul van der Laan
- University of Groningen, University Medical Center Groningen, Department of Radiation Oncology, Groningen, the Netherlands
| | | | - Paul M N Werker
- University of Groningen, University Medical Center Groningen, Department of Plastic Surgery, Groningen, the Netherlands
| | - Johannes A Langendijk
- University of Groningen, University Medical Center Groningen, Department of Radiation Oncology, Groningen, the Netherlands
| | - Roel J H M Steenbakkers
- University of Groningen, University Medical Center Groningen, Department of Radiation Oncology, Groningen, the Netherlands
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Sun H, He C, Vujaklija I. Design trends in actuated lower-limb prosthetic systems: a narrative review. Expert Rev Med Devices 2023; 20:1157-1172. [PMID: 37925668 DOI: 10.1080/17434440.2023.2279999] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Accepted: 11/02/2023] [Indexed: 11/07/2023]
Abstract
INTRODUCTION Actuated lower limb prostheses, including powered (active) and semi-active (quasi-passive) joints, are endowed with controllable power and/or impedance, which can be advantageous to limb impairment individuals by improving locomotion mechanics and reducing the overall metabolic cost of ambulation. However, an increasing number of commercial and research-focused options have made navigating this field a daunting task for users, researchers, clinicians, and professionals. AREAS COVERED The present paper provides an overview of the latest trends and developments in the field of actuated lower-limb prostheses and corresponding technologies. Following a gentle summary of essential gait features, we introduce and compare various actuated prosthetic solutions in academia and the market designed to provide assistance at different levels of impairments. Correspondingly, we offer insights into the latest developments of sockets and suspension systems, before finally discussing the established and emerging trends in surgical approaches aimed at improving prosthetic experience through enhanced physical and neural interfaces. EXPERT OPINION The ongoing challenges and future research opportunities in the field are summarized for exploring potential avenues for development of next generation of actuated lower limb prostheses. In our opinions, a closer multidisciplinary integration can be found in the field of actuated lower-limb prostheses in the future.
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Affiliation(s)
- Haoran Sun
- School of Mechanical Engineering, Southwest Jiaotong University, Chengdu, P.R. China
- Department of Electrical Engineering and Automation, Aalto University, Espoo, Finland
| | - Chaoming He
- School of Mechanical Engineering, Southwest Jiaotong University, Chengdu, P.R. China
| | - Ivan Vujaklija
- Department of Electrical Engineering and Automation, Aalto University, Espoo, Finland
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Hu X, Tang J, Cai W, Sun Z, Zhao Z, Qu X. Characteristics of foot plantar pressure during turning in young male adults. Gait Posture 2023; 101:1-7. [PMID: 36696820 DOI: 10.1016/j.gaitpost.2023.01.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Revised: 07/27/2022] [Accepted: 01/08/2023] [Indexed: 01/11/2023]
Abstract
BACKGROUND Turning gait is considered as a challenging motor task. However, only few existing studies reported turning biomechanics from the aspect of foot plantar pressure. RESEARCH QUESTION This study aimed to investigate turning biomechanics by studying foot plantar pressure characteristics METHODS: Twelve young male participants were involved in this experimental study. They were instructed to perform turning tasks with different turning angles (i.e., 30°, 60°, and 90°). Foot plantar pressure was quantified by the force time integral (FTI) underneath seven plantar sub-areas. Analysis was carried out for different turning strategies (spin turns versus step turns), separately. RESULTS The results showed that for small-angle spin turns, plantar pressure patterns changed at the early stage of the approaching step, suggesting a preparatory action for the increased lower limb range of motion in the transverse plane during turning; for step turns, an imbalance weight bearing mechanism was adopted when making large-angle turns to compensate for the centripetal force during turning. SIGNIFICANCE The findings provide improved knowledge about turning biomechanics. They have practical implications for motion planning of lower-limb assistive devices for those with difficulties in turning.
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Affiliation(s)
- Xinyao Hu
- Institute of Human Factors and Ergonomics, College of Mechatronics and Control Engineering, Shenzhen University, China
| | - Junpeng Tang
- Institute of Human Factors and Ergonomics, College of Mechatronics and Control Engineering, Shenzhen University, China
| | - Wenfei Cai
- Department of Sports, Shenzhen University, China
| | - Zhenglong Sun
- School of Science and Engineering, Chinese University of Hong Kong (Shenzhen), Shenzhen, China
| | - Zhong Zhao
- Institute of Human Factors and Ergonomics, College of Mechatronics and Control Engineering, Shenzhen University, China
| | - Xingda Qu
- Institute of Human Factors and Ergonomics, College of Mechatronics and Control Engineering, Shenzhen University, China.
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Wong DWC, Cheung JCW, Zhao JG, Ni M, Yang ZY. Forefoot Function after Hallux Valgus Surgery: A Systematic Review and Meta-Analysis on Plantar Load Measurement. J Clin Med 2023; 12:jcm12041384. [PMID: 36835920 PMCID: PMC9965975 DOI: 10.3390/jcm12041384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Revised: 01/31/2023] [Accepted: 02/06/2023] [Indexed: 02/12/2023] Open
Abstract
While hallux valgus (HV) surgeries are useful for correcting skeletal alignment problems, their effects on plantar load, which reflects forefoot functions, are less understood. The objective of this study is to conduct a systematic review and meta-analysis on the plantar load change after HV surgeries. A systematic search of Web of Science, Scopus, PubMed, CENTRAL, EMBASE, and CINAHL was performed. Studies that assessed the pre- and post-operative plantar pressure of HV patients undergoing surgeries and reported load-related parameters over the hallux, medial metatarsal, and/or central metatarsal regions were included. Studies were appraised by using the modified NIH quality assessment tool for before-after study. Studies suitable for meta-analysis were pooled with the random-effects model, using the standardized mean difference of the before-after parameters as an effect measure. Twenty-six studies containing 857 HV patients and 973 feet were included for the systematic review. Meta-analysis was conducted on 20 of them, and most studies did not favor HV surgeries. Overall, HV surgeries reduced the plantar load over the hallux region (SMD -0.71, 95% CI, -1.15 to -0.26), indicating that forefoot function worsened after surgeries. For the other five outcomes, the overall estimates were not statistically significant, indicating that surgeries did not improve them either. There was substantial heterogeneity among the studies, which in most cases could not be resolved by pre-planned subgroup analyses by surgical classification, year of publication, median age of patients, and length of follow-up. Sensitivity analysis removing lower-quality studies showed that the load integrals (impulse) over the central metatarsal region significantly increased (SMD 0.27, 95% CI, 0 to 0.53), indicating that surgeries increased the risk of transfer metatarsalgia. There is no solid evidence that HV surgeries could improve forefoot functions from a biomechanical point perspective. Currently available evidence even suggests that surgeries might reduce the plantar load over the hallux and adversely affect push-off function. The reasons behind and the effectiveness of alternative surgical methods warrant further investigation.
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Affiliation(s)
- Duo Wai-Chi Wong
- Jockey Club School of Public Health and Primary Care, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong 999077, China
- Department of Biomedical Engineering, Faculty of Engineering, The Hong Kong Polytechnic University, Hong Kong 999077, China
| | - James Chung-Wai Cheung
- Jockey Club School of Public Health and Primary Care, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong 999077, China
| | - Jia-Guo Zhao
- Department of Orthopaedic Surgery, Tianjin Hospital, Tianjin 300211, China
| | - Ming Ni
- Department of Science Development, Ruijin Hospital, Shanghai Jiao Tong University, Shanghai 200240, China
- Department of Orthopaedics, Pudong New Area People’s Hospital, Shanghai 201299, China
| | - Zu-Yao Yang
- Jockey Club School of Public Health and Primary Care, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong 999077, China
- Correspondence: ; Tel.: +852-2252-8739
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12
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Ben Ammar M, Sahnoun S, Fakhfakh A, Viehweger C, Kanoun O. Self-Powered Synchronized Switching Interface Circuit for Piezoelectric Footstep Energy Harvesting. SENSORS (BASEL, SWITZERLAND) 2023; 23:s23041830. [PMID: 36850428 PMCID: PMC9966393 DOI: 10.3390/s23041830] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Revised: 01/13/2023] [Accepted: 01/27/2023] [Indexed: 06/01/2023]
Abstract
Piezoelectric Vibration converters are nowadays gaining importance for supplying low-powered sensor nodes and wearable electronic devices. Energy management interfaces are thereby needed to ensure voltage compatibility between the harvester element and the electric load. To improve power extraction ability, resonant interfaces such as Parallel Synchronized Switch Harvesting on Inductor (P-SSHI) have been proposed. The main challenges for designing this type of energy management circuits are to realise self-powered solutions and increase the energy efficiency and adaptability of the interface for low-power operation modes corresponding to low frequencies and irregular vibration mechanical energy sources. In this work, a novel Self-Powered (SP P-SSHI) energy management circuit is proposed which is able to harvest energy from piezoelectric converters at low frequencies and irregular chock like footstep input excitations. It has a good power extraction ability and is adaptable for different storage capacitors and loads. As a proof of concept, a piezoelectric shoe insole with six integrated parallel piezoelectric sensors (PEts) was designed and implemented to validate the performance of the energy management interface circuit. Under a vibration excitation of 1 Hz corresponding to a (moderate walking speed), the maximum reached efficiency and power of the proposed interface is 83.02% and 3.6 mW respectively for the designed insole, a 10 kΩ resistive load and a 10 μF storage capacitor. The enhanced SP-PSSHI circuit was validated to charge a 10 μF capacitor to 6 V in 3.94 s and a 1 mF capacitor to 3.2 V in 27.64 s. The proposed energy management interface has a cold start-up ability and was also validated to charge a (65 mAh, 3.1 V) maganese dioxide coin cell Lithium battery (ML 2032), demonstrating the ability of the proposed wearable piezoelectric energy harvesting system to provide an autonomous power supply for wearable wireless sensors.
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Affiliation(s)
- Meriam Ben Ammar
- Measurements and Sensor Technology, Faculty of Electrical Engineering and Information Technology, Chemnitz University of Technology, 09126 Chemnitz, Germany
- National School of Electronics and Telecommunications of Sfax, University of Sfax, Sfax 3038, Tunisia
- Laboratory of Signals, Systems, Artificial Intelligence and Networks, Digital Research Center of Sfax, University of Sfax, Sfax 3038, Tunisia
| | - Salwa Sahnoun
- National School of Electronics and Telecommunications of Sfax, University of Sfax, Sfax 3038, Tunisia
- Laboratory of Signals, Systems, Artificial Intelligence and Networks, Digital Research Center of Sfax, University of Sfax, Sfax 3038, Tunisia
| | - Ahmed Fakhfakh
- National School of Electronics and Telecommunications of Sfax, University of Sfax, Sfax 3038, Tunisia
- Laboratory of Signals, Systems, Artificial Intelligence and Networks, Digital Research Center of Sfax, University of Sfax, Sfax 3038, Tunisia
| | - Christian Viehweger
- Measurements and Sensor Technology, Faculty of Electrical Engineering and Information Technology, Chemnitz University of Technology, 09126 Chemnitz, Germany
| | - Olfa Kanoun
- Measurements and Sensor Technology, Faculty of Electrical Engineering and Information Technology, Chemnitz University of Technology, 09126 Chemnitz, Germany
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13
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Running Velocity and Longitudinal Bending Stiffness Influence the Asymmetry of Kinematic Variables of the Lower Limb Joints. Bioengineering (Basel) 2022; 9:bioengineering9110607. [PMID: 36354518 PMCID: PMC9687503 DOI: 10.3390/bioengineering9110607] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2022] [Revised: 10/10/2022] [Accepted: 10/19/2022] [Indexed: 11/17/2022] Open
Abstract
Running-related limb asymmetries suggest specific sports injuries and recovery circumstances. It is debatable if running speed affected asymmetry, and more research is required to determine how longitudinal bending stiffness (LBS) affected asymmetry. The purpose of this study was to investigate the influence of running velocity and LBS on kinematic characteristics of the hip, knee, ankle, metatarsophalangeal joint (MTP) and the corresponding asymmetry. Kinematic (200 Hz) running stance phase data were collected bilaterally for 16 healthy male recreational runners (age: 23.13 ± 1.17, height: 175.2 ± 1.6 cm, body mass: 75.7 ± 3.6 kg, BMI: 24.7 ± 1.3 kg/m2) running on a force plate at three different velocities (10, 12 and 14 km/h) and three increasing-LBS shoes in a randomized order. The symmetry angle (SA) was calculated to quantify gait asymmetry magnitude at each running velocity and LBS. Changes in running velocity and LBS led to differences in kinematic variables between the hip, knee, ankle and MTP (p < 0.05). Significant changes in SA caused by running velocity were found in the knee flexion angle (p = 0.001) and flexion angle peak velocity (p < 0.001), ankle plantarflexion angle (p = 0.001) and plantarflexion angle peak velocity (p = 0.043) and MTP dorsiflexion angle (p = 0.001) and dorsiflexion angle peak velocity (p = 0.019). A significant change in the SA caused by LBS was found in the MTP dorsiflexion peak angle velocity (p = 0.014). There were interaction effects between running velocity and LBS on the MTP plantarflexion angle (p = 0.033) and plantarflexion angle peak velocity (p = 0.038). These findings indicate the existence of bilateral lower limb asymmetry. Meanwhile, it was proved that running velocity and LBS can influence the asymmetry of lower limb joints. Additionally, there was an interaction between running velocity and LBS on the asymmetry of the lower limb. These findings can provide some information for sports injuries, such as metatarsal stress fractures and anterior cruciate ligament injuries. They can also provide some useful information for running velocities and running shoes.
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The Design of a Smart Lower-Limb Prosthesis Supporting People with Transtibial Amputation—A Data Acquisition System. APPLIED SCIENCES-BASEL 2022. [DOI: 10.3390/app12136722] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
For people with amputated lower limbs, it is imperative to make high-performance prostheses that reproduce, as accurately as possible, the functions of the amputated limb. In this case, a preliminary study of the lower limbs from a kinematic and dynamic point of view is necessary. This paper proposes a prosthesis design and a system for acquiring the information needed to determine the stepping phase kinematic and dynamic parameters of the legs. This system consists of a sensory system attached to the legs and a acquisition data unit built around a microcontroller. The sensory system is based on a sensory system for determining the weight distribution on the sole, made of resistive pressure sensors. The sensory system will be subjected to measurement repeatability and homogeneity tests to evaluate and validate the accuracy and error of the proposed solution. The data obtained by the sensory system is transmitted in real-time, via wi-fi, to a computer system for interpretation. After processing and interpreting the data using standard data sets for comparison, the position of the legs, the type of gait and the phase of movement can be determined. Constructively, the system is configurable and can be adapted to any person, male or female, regardless of shoe size.
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15
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Semjonova G, Davidovica A, Kozlovskis N, Okss A, Katashevs A. Smart Textile Sock System for Athletes’ Self-Correction during Functional Tasks: Formative Usability Evaluation. SENSORS 2022; 22:s22134779. [PMID: 35808274 PMCID: PMC9268753 DOI: 10.3390/s22134779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Revised: 06/20/2022] [Accepted: 06/22/2022] [Indexed: 11/24/2022]
Abstract
(1) Background: The development of a lightweight, easy-to-use system that measures the foot’s plantar pressure is becoming an increasingly important area of research in physiotherapy. For further development of the smart sock system, a formative usability study was conducted, where the smart textile sock sensor system was used for self-correction during functional tasks; (2) Methods: Five athletes from the football school participated in the formative usability study. Athletes performed pre-defined functional tasks for self-correction when interacting with the smart textile sock system. Formative usability evaluation methods: effectiveness (task success rate, error rate), efficiency (time-based), satisfaction evaluated by System Usability Scale (SUS); (3) Results: Formative usability indicators: task completeness effectiveness ranged from 40% to 100% in the first- and second-stage tasks. Completed task efficiency time: Stage 1, from 4.2 s (SD 1.3) to 88.8 s (SD 19.8); Stage 2, from 7.2 s (SD 1.9) to 9.6 s (SD 2.1). Satisfaction was assessed by the SUS system user group with 76 points (SD 7.42), which indicates “good” satisfaction; (4) Conclusions: formative usability indicators showed the need for technical improvements to the smart textile sock pressure sensor system. The SUS results indicate “good” satisfaction with the smart textile sock pressure sensor system and its application.
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Affiliation(s)
- Guna Semjonova
- Department of Rehabilitation, Riga Stradins University, 16 Dzirciema Street, LV-1007 Riga, Latvia;
- Correspondence:
| | - Anna Davidovica
- Department of Rehabilitation, Riga Stradins University, 16 Dzirciema Street, LV-1007 Riga, Latvia;
| | - Nikita Kozlovskis
- Institute of Applied Computer Systems, Riga Technical University, LV-1658 Riga, Latvia;
| | - Aleksandrs Okss
- Institute of Design Technologies, Riga Technical University, LV-1048 Riga, Latvia;
| | - Aleksejs Katashevs
- Institute of Biomedical Engineering and Nanotechnology, Riga Technical University, LV-1048 Riga, Latvia;
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16
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Safarloo S, Núñez-Cascajero A, Sanchez-Gomez R, Vázquez C. Polymer Optical Fiber Plantar Pressure Sensors: Design and Validation. SENSORS 2022; 22:s22103883. [PMID: 35632292 PMCID: PMC9144141 DOI: 10.3390/s22103883] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Accepted: 05/18/2022] [Indexed: 02/04/2023]
Abstract
The proper measurement of plantar pressure during gait is critical for the clinical diagnosis of foot problems. Force platforms and wearable devices have been developed to study gait patterns during walking or running. However, these devices are often expensive, cumbersome, or have boundary constraints that limit the participant’s motions. Recent advancements in the quality of plastic optical fiber (POF) have made it possible to manufacture a low-cost bend sensor with a novel design for use in plantar pressure monitoring. An intensity-based POF bend sensor is not only lightweight, non-invasive, and easy to construct, but it also produces a signal that requires almost no processing. In this work, we have designed, fabricated, and characterized a novel intensity POF sensor to detect the force applied by the human foot and measure the gait pattern. The sensors were put through a series of dynamic and static tests to determine their measurement range, sensitivity, and linearity, and their response was compared to that of two different commercial force sensors, including piezo resistive sensors and a clinical force platform. The results suggest that this novel POF bend sensor can be used in a wide range of applications, given its low cost and non-invasive nature. Feedback walking monitoring for ulcer prevention or sports performance could be just one of those applications.
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Affiliation(s)
- Sahar Safarloo
- Electronics Technology Department, Escuela Politécnica Superior, Universidad Carlos III de Madrid, 28911 Leganés, Spain; (S.S.); (A.N.-C.)
| | - Arántzazu Núñez-Cascajero
- Electronics Technology Department, Escuela Politécnica Superior, Universidad Carlos III de Madrid, 28911 Leganés, Spain; (S.S.); (A.N.-C.)
| | - Ruben Sanchez-Gomez
- Nursing Department, Faculty of Nursing, Physiotherapy and Podiatry, Universidad Complutense de Madrid, 28040 Madrid, Spain;
| | - Carmen Vázquez
- Electronics Technology Department, Escuela Politécnica Superior, Universidad Carlos III de Madrid, 28911 Leganés, Spain; (S.S.); (A.N.-C.)
- Correspondence:
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17
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Bernardes RA, Caldeira S, Parreira P, Sousa LB, Almeida IF, Santos-Costa P, Paiva-Santos F, Guardado Cruz A. Baropodometric Assessment of the Podiatric Profile of Nursing Students in Clinical Settings: A Study Protocol. Front Public Health 2022; 10:862048. [PMID: 35646767 PMCID: PMC9135167 DOI: 10.3389/fpubh.2022.862048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Accepted: 04/13/2022] [Indexed: 11/13/2022] Open
Abstract
Introduction Nursing students are exposed to increased risks of developing foot and ankle disorders due to prolonged standing and walking positions during clinical settings. This can lead to high dropout rates from nursing degree, thus contributing to a future shortage in nursing professionals. This protocol aims to develop a study to understand the influence of prolonged standing and walking positions on nursing students' foot health, and specifically to study the relationship between the podiatric profile (regional force and pressure exerted on the foot) and related signs and symptoms. Methods and Analysis A prospective observational cohort study will be conducted with 194 nursing students. Participants will be asked to walk through a baropodometric platform before and after a 5-month clinical training session. Assessment will focus on the change in podiatric profile, namely foot posture and foot function, at 5 months, and changes in foot health at 5 months. The study will start in January 2022 and it's expected to end by June 2022. Discussion The study aims to perform an innovative assessment of nursing students' podiatric profile, which will allow for a comprehensive description of foot/ankle changes and their relationship with prolonged standing and walking contexts. Ethics and Dissemination The study was approved by The Ethical Committee of the Health Sciences Research Unit: Nursing (UICISA: E), of the Nursing School of Coimbra (ESEnfC), with the approval code nr. P799_07_2021. The study was also recorded in ClinicalTrials.gov on the number NCT05197166. Findings will be used to publish articles in peer-review scientific journals and oral communications and posters at scientific meetings.
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Affiliation(s)
- Rafael A. Bernardes
- The Health Sciences Research Unit: Nursing (UICISA: E), Nursing School of Coimbra (ESEnfC), Coimbra, Portugal
- *Correspondence: Rafael A. Bernardes
| | - Sílvia Caldeira
- Centre for Interdisciplinary Research in Health, Institute of Health Sciences, Universidade Cattólica Portuguesa, Lisbon, Portugal
| | - Pedro Parreira
- The Health Sciences Research Unit: Nursing (UICISA: E), Nursing School of Coimbra (ESEnfC), Coimbra, Portugal
| | - Liliana B. Sousa
- The Health Sciences Research Unit: Nursing (UICISA: E), Nursing School of Coimbra (ESEnfC), Coimbra, Portugal
| | - Inês F. Almeida
- The Health Sciences Research Unit: Nursing (UICISA: E), Nursing School of Coimbra (ESEnfC), Coimbra, Portugal
| | - Paulo Santos-Costa
- The Health Sciences Research Unit: Nursing (UICISA: E), Nursing School of Coimbra (ESEnfC), Coimbra, Portugal
| | - Filipe Paiva-Santos
- The Health Sciences Research Unit: Nursing (UICISA: E), Nursing School of Coimbra (ESEnfC), Coimbra, Portugal
| | - Arménio Guardado Cruz
- The Health Sciences Research Unit: Nursing (UICISA: E), Nursing School of Coimbra (ESEnfC), Coimbra, Portugal
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18
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Żurawski A, Śliwiński Z, Suliga E, Śliwiński G, Wypych Ż, Kiebzak W. Effect of Thoracic Kyphosis and Lumbar Lordosis on the Distribution of Ground Reaction Forces on the Feet. Orthop Res Rev 2022; 14:187-197. [PMID: 35601185 PMCID: PMC9121884 DOI: 10.2147/orr.s344972] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Accepted: 04/27/2022] [Indexed: 11/24/2022] Open
Abstract
Introduction In clinical practice, foot load receptors are very important in shaping the correct vertical posture and optimal equilibrium reactions. They are so important that stimulating them gives measurable effects in improving both balance and posture. Plantar pressure distribution is an important parameter that provides information on changes in a person’s posture, also during gait. Aim The aim of the work is to assess the effect of thoracic kyphosis and lumbar lordosis on the distribution of ground reaction forces on the feet. Materials and Methods A total of 211 subjects aged 8–12 were examined. Body posture and distribution of ground reaction forces on the feet were assessed using the following parameters: thoracic kyphosis angle, lumbar lordosis angle, maximum pressure (static), average pressure (static), foot surface, distribution of foot pressure, maximum pressure (dynamic), time load (dynamic). DIERS formetric and DIERS pedoscan methods were used to measure the parameters. Results The level of the kyphosis angle correlated positively with the percentage distribution of forefoot load in static conditions. The level of lordosis angle correlated positively with the foot surface and forefoot load. Positive correlation of the lordosis angle is also related to its connection with the difference in leg load during gait. A broader cause and effect view of body posture defects and the distribution of ground reaction forces on the feet can affect a more complete assessment of the correlation between these variables, contributing to more effective treatment of any disorders of the described phenomena. Conclusion The size of thoracic kyphosis and lumbar lordosis affects the distribution of ground reaction forces on the feet. The effect of lumbar lordosis has a linear value in relation to percentage distribution of forefoot and heel loads.
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Affiliation(s)
| | | | - Edyta Suliga
- Collegium Medicum, Jan Kochanowski University, Kielce, Poland
| | | | - Żaneta Wypych
- Collegium Medicum, Jan Kochanowski University, Kielce, Poland
- Correspondence: Żaneta Wypych, Tel +48 728373970, Email
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19
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Ardhianto P, Subiakto RBR, Lin CY, Jan YK, Liau BY, Tsai JY, Akbari VBH, Lung CW. A Deep Learning Method for Foot Progression Angle Detection in Plantar Pressure Images. SENSORS 2022; 22:s22072786. [PMID: 35408399 PMCID: PMC9003219 DOI: 10.3390/s22072786] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Revised: 03/31/2022] [Accepted: 04/01/2022] [Indexed: 02/01/2023]
Abstract
Foot progression angle (FPA) analysis is one of the core methods to detect gait pathologies as basic information to prevent foot injury from excessive in-toeing and out-toeing. Deep learning-based object detection can assist in measuring the FPA through plantar pressure images. This study aims to establish a precision model for determining the FPA. The precision detection of FPA can provide information with in-toeing, out-toeing, and rearfoot kinematics to evaluate the effect of physical therapy programs on knee pain and knee osteoarthritis. We analyzed a total of 1424 plantar images with three different You Only Look Once (YOLO) networks: YOLO v3, v4, and v5x, to obtain a suitable model for FPA detection. YOLOv4 showed higher performance of the profile-box, with average precision in the left foot of 100.00% and the right foot of 99.78%, respectively. Besides, in detecting the foot angle-box, the ground-truth has similar results with YOLOv4 (5.58 ± 0.10° vs. 5.86 ± 0.09°, p = 0.013). In contrast, there was a significant difference in FPA between ground-truth vs. YOLOv3 (5.58 ± 0.10° vs. 6.07 ± 0.06°, p < 0.001), and ground-truth vs. YOLOv5x (5.58 ± 0.10° vs. 6.75 ± 0.06°, p < 0.001). This result implies that deep learning with YOLOv4 can enhance the detection of FPA.
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Affiliation(s)
- Peter Ardhianto
- Department of Visual Communication Design, Soegijapranata Catholic University, Semarang 50234, Indonesia;
- Department of Digital Media Design, Asia University, Taichung 413305, Taiwan;
| | | | - Chih-Yang Lin
- Department of Electrical Engineering, Yuan Ze University, Chung-Li 32003, Taiwan;
| | - Yih-Kuen Jan
- Rehabilitation Engineering Lab, University of Illinois at Urbana-Champaign, Champaign, IL 61820, USA;
- Kinesiology and Community Health, University of Illinois at Urbana-Champaign, Champaign, IL 61820, USA
- Computational Science and Engineering, University of Illinois at Urbana-Champaign, Champaign, IL 61820, USA
| | - Ben-Yi Liau
- Department of Biomedical Engineering, Hungkuang University, Taichung 433304, Taiwan;
| | - Jen-Yung Tsai
- Department of Digital Media Design, Asia University, Taichung 413305, Taiwan;
| | | | - Chi-Wen Lung
- Rehabilitation Engineering Lab, University of Illinois at Urbana-Champaign, Champaign, IL 61820, USA;
- Department of Creative Product Design, Asia University, Taichung 413305, Taiwan;
- Correspondence: or
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20
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Perfusion, Stance and Plantar Pressure Asymmetries on the Human Foot in the Absence of Disease—A Pilot Study. Symmetry (Basel) 2022. [DOI: 10.3390/sym14030441] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Physiological perfusion asymmetries in the lower limb are known, although poorly understood, as are asymmetries reported in plantar pressure and stance. This preliminary study aims to explore potential relationships between perfusion and pressure variables in humans. A convenience sample of eight healthy individuals (25.25 ± 5.37 years old) of both sexes, was selected. Chosen variables were perfusion, plantar pressure, and stance. Perfusion was measured in both feet by laser Doppler flowmetry (LDF) and polarized light spectroscopy (PSp), and plantar pressure and stance obtained by a pressure plate. These were measured in baseline (Phase I) in a repeated squatting (Phase II), and in recovery (Phase III). A 95% confidence interval was adopted. Intraindividual significant perfusion asymmetries between both feet were detected by LDF in Phase I. These disappeared in Phase II and returned in Phase III. PSp did not detect any asymmetries. Plantar pressure was also asymmetric and differently distributed along both feet with no statistical significance except in the hindfoot. Significant correlations were found between BMI and mean Plantar Pressure in Phase I and Phase III, and an inverse correlation between LDF perfusion and Plantar Pressure in Phase I. These results seem to suggest an interesting direction for exploration and study of these asymmetries in the absence of disease.
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21
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Backward vs. Forward Gait Symmetry Analysis Based on Plantar Pressure Mapping. Symmetry (Basel) 2022. [DOI: 10.3390/sym14020203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022] Open
Abstract
Symmetry is one of the factors analysed in normal and pathological gaits. Backward gait is an area of interest to scientists, in terms of its physiology and therapeutic possibilities. This study aimed to analyse the symmetry of the pressure parameters of backward gait in comparison to forward gait using different symmetry indices. Eighty-one healthy people aged between 19 and 84 years took part in the study. Foot pressure distribution was analysed during forward and backward gaits at self-selected speeds. Mean and maximum pressure values were calculated after dividing the foot into four or ten areas. Delta, Ratio Index, Robinson Index, Gait Asymmetry, and Symmetry Angle were calculated for each area, separately for both forward and backward gaits. Higher ratios of asymmetry were found during backward than during forward gait. Larger ratios of asymmetry were found within toes II–V, forefoot, metatarsals I, II, and III, medial and lateral heel areas. No significant correlation between symmetry indices and age or BMI was found. Results suggested that the lower symmetry of backward gait is caused by a higher number of corrective movements that allow for the maintenance of body balance and global symmetry of gait. This can be realised by increased cortical control of the backward gait, which was a new movement task for all participants.
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22
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Subramaniam S, Majumder S, Faisal AI, Deen MJ. Insole-Based Systems for Health Monitoring: Current Solutions and Research Challenges. SENSORS (BASEL, SWITZERLAND) 2022; 22:438. [PMID: 35062398 PMCID: PMC8780030 DOI: 10.3390/s22020438] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/11/2021] [Revised: 01/01/2022] [Accepted: 01/03/2022] [Indexed: 02/04/2023]
Abstract
Wearable health monitoring devices allow for measuring physiological parameters without restricting individuals' daily activities, providing information that is reflective of an individual's health and well-being. However, these systems need to be accurate, power-efficient, unobtrusive and simple to use to enable a reliable, convenient, automatic and ubiquitous means of long-term health monitoring. One such system can be embedded in an insole to obtain physiological data from the plantar aspect of the foot that can be analyzed to gain insight into an individual's health. This manuscript provides a comprehensive review of insole-based sensor systems that measure a variety of parameters useful for overall health monitoring, with a focus on insole-based PPD measurement systems developed in recent years. Existing solutions are reviewed, and several open issues are presented and discussed. The concept of a fully integrated insole-based health monitoring system and considerations for future work are described. By developing a system that is capable of measuring parameters such as PPD, gait characteristics, foot temperature and heart rate, a holistic understanding of an individual's health and well-being can be obtained without interrupting day-to-day activities. The proposed device can have a multitude of applications, such as for pathology detection, tracking medical conditions and analyzing gait characteristics.
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Affiliation(s)
- Sophini Subramaniam
- School of Biomedical Engineering, McMaster University, Hamilton, ON L8S 4L8, Canada;
| | - Sumit Majumder
- Electrical and Computer Engineering, McMaster University, Hamilton, ON L8S 4L8, Canada; (S.M.); (A.I.F.)
- Department of Biomedical Engineering, Chittagong University of Engineering and Technology, Chattogram 4349, Bangladesh
| | - Abu Ilius Faisal
- Electrical and Computer Engineering, McMaster University, Hamilton, ON L8S 4L8, Canada; (S.M.); (A.I.F.)
| | - M. Jamal Deen
- School of Biomedical Engineering, McMaster University, Hamilton, ON L8S 4L8, Canada;
- Electrical and Computer Engineering, McMaster University, Hamilton, ON L8S 4L8, Canada; (S.M.); (A.I.F.)
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Rogerio FRPG, Guedes DP. Plantar pressure during gait: norm-referenced measurement for Brazilian healthy adults using the Footwork Pro® System. FISIOTERAPIA EM MOVIMENTO 2022. [DOI: 10.1590/fm.2022.35137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Abstract Introduction The measurement of plantar pressure is an important component in the evaluation of the locomotive system. However, the absence of norm-referenced measurement poses limitations to its use. Objective To verify the influence of gender on plantar pressure during gait in healthy adults and to propose norm-referenced measurement that may be used as a reference for monitoring. Methods The study included 353 healthy participants (158 females and 195 males), aged between 20 and 64 years, and with a normal foot posture. Using a pressure platform, the peak plantar pressure and pressure-time integrals were measured in three areas of the foot: forefoot, midfoot, and hindfoot. Results Both indicators of plantar pressure showed no significant differences between genders (p ≤ 0.05). Higher peak plantar pressure was found in the forefoot region, while a higher pressure-time integral was found in the hindfoot region. Percentile distribution values were made available for the data set of females and males. Conclusion The available norm-referenced measurement may be used to identify pathological gait parameters, monitor the efficacy of therapeutic interventions, and detect individuals in need of referral for a more sophisticated and detailed evaluation.
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Lanuza-Cerzócimo C, Alfaro-Santafé J, Almenar-Arasanz AJ, Alfaro-Santafé JV, Pérez-Morcillo A, Gómez-Bernal A. Variación baropodométrica con la pérdida de peso: un estudio experimental. REVISTA ESPAÑOLA DE PODOLOGÍA 2022. [DOI: 10.20986/revesppod.2022.1627/2021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Effectiveness of the Mat Pilates on the postural control, plantar pressure and plantar arch of school children: A randomized clinical trial. J Bodyw Mov Ther 2021; 28:576-584. [PMID: 34776199 DOI: 10.1016/j.jbmt.2021.09.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Revised: 07/15/2021] [Accepted: 09/24/2021] [Indexed: 11/23/2022]
Abstract
OBJECTIVE To evaluate the effectiveness of Mat Pilates on postural control, plantar pressure and plantar arch (ALM) in schoolchildren. DESIGN AND SETTING The study was a randomized clinical trial, developed at the Early Childhood Education Institute, Londrina-PR. The participants were randomly assigned to groups: Pilates Group (PG) and Control Group (CG). Patients in the CG did not perform extra physical activity (Interventions). PARTICIPANTS 43 children (eight to 12 years), no prior knowledge of the Pilates method, and no exercise training in the last six months. INTERVENTION The exercise program was based on the Mat Pilates method, twice weekly, 50 min each, 28 sessions. OUTCOME MEASURES Static balance (force platform), dynamic balance (the Reach Test), ALM (plantigraphy) and plantar pressure (baropodometry). The assessors were blinded to the allocation of participants. RESULTS Three children were excluded before randomization and 40 were randomized (PG n: 20; CG n:20).12 children were excluded during the protocol (PG n:7; CG n:5) and included in the intention to treat analysis. No significant difference between groups was observed for static and dynamic balance and ALM measures. There was a significant difference in the following outcomes for the PG: the plantar pressure on the right hemibody forefoot between pre-test 38.70 ± 14.38 and post-test 42.65 ± 15.63 (ES = 0.66; SRM = 0.50). The plantar pressure on the right hemibody rearfoot between pre-test 61.10 ± 14.18 and post-test 56.85 ± 19.39 (ES = 0.68; SRM = 0.53). No adverse or harmful events were reported in any group. CONCLUSION There were no differences in static and dynamic postural control and ALM between PG and CG. However, children GP showed improvement in some results of plantar pressure in relation CG. CLINICAL TRIAL REGISTRATION NUMBER Brazilian Registry of Clinical Trials (REBEC) (N_ RBR-8t5p7d).
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Ahmadian M, Beheshti MT, Kalhor A, Shirian A. Unsupervised Generative Adversarial Network for Plantar Pressure Image-to-Image Translation. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2021; 2021:2580-2583. [PMID: 34891781 DOI: 10.1109/embc46164.2021.9629684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Analyzing human gait from plantar pressure is critical for human health. The majority of works focus on classifying the healthy plantar pattern from unhealthy ones. Different from previous works, we adopt a generative adversarial network to produce healthy plantar pressure image for individual patients. In this work, we do not have pairs of images for training thus we cast the problem as an unsupervised generative adversarial learning task. Our network benefits from multiple components: an encoder-decoder generator, a convolution-based discriminator, a convolution-based evaluation network, and a new term in the loss function to preserve the person's gait style. Our method achieves high performance (99.8%) on the CAD WALK databases which have patients with hallux valgus disease.
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Evaluating the Symmetry in Plantar Pressure Distribution under the Toes during Standing in a Postural Pedobarographic Examination. Symmetry (Basel) 2021. [DOI: 10.3390/sym13081476] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Pedobarography is a safe, non-invasive diagnostic method that enables estimation of plantar pressure distribution. This article aims to describe the symmetry between right and left toes in the Polish adult population using data obtained during postural pedobarographic examinations. Eighty-two patients, both sexes, with a mean age of 42.12 (range 19–70), without significant pathologies, participated in the study. Plantar pressure was evaluated using a PEL38 pressure plate. The study applies the elements of Cavanagh’s classification to identify the foot sole regions: Hallux, Second Toe and Lateral Toe areas and the entire foot surface. The parameters measured included maximal and average pressures, total support area for each foot, and contact area of the foot with the ground at individual moments of standing. The results showed significantly greater loading under the right Hallux in women. As regards men, higher values in the whole foot pressure distribution were noted on the left side. Plantar pressure distribution does not increase along with the global factors such as age and body mass. The findings suggest that the asymmetry in the morphological structure of the foot does not determine the asymmetry in the plantar pressure distribution. None of the feet studied had full symmetry on the entire surface.
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Keatsamarn T, Visitsattapongse S, Aoyama H, Pintavirooj C. Optical-Based Foot Plantar Pressure Measurement System for Potential Application in Human Postural Control Measurement and Person Identification. SENSORS (BASEL, SWITZERLAND) 2021; 21:4437. [PMID: 34203534 PMCID: PMC8271937 DOI: 10.3390/s21134437] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/06/2021] [Revised: 06/23/2021] [Accepted: 06/24/2021] [Indexed: 11/25/2022]
Abstract
Plantar pressure, the pressure exerted between the sole and the supporting surface, has great potentialities in various research fields, including footwear design, biometrics, gait analysis and the assessment of patients with diabetes. This research designs an optical-based foot plantar pressure measurement system aimed for human postural control and person identification. The proposed system consists of digital cameras installed underneath an acrylic plate covered by glossy white paper and mounted with LED strips along the side of the plate. When the light is emitted from the LED stripes, it deflects the digital cameras due to the pressure exerted between the glossy white paper and the acrylic plate. In this way, the cameras generate color-coded plantar pressure images of the subject standing on the acrylic-top platform. Our proposed system performs personal identification and postural control by extracting static and dynamic features from the generated plantar pressure images. Plantar pressure images were collected from 90 individuals (40 males, 50 females) to develop and evaluate the proposed system. In posture balance evaluation, we propose the use of a posture balance index that contains both magnitude and directional information about human posture balance control. For person identification, the experimental results show that our proposed system can achieve promising results, showing an area under the receiver operating characteristic (ROC) curve of 0.98515 (98.515%), an equal error rate (EER) of 5.8687%, and efficiency of 98.515%.
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Affiliation(s)
- Tanapon Keatsamarn
- King Mongkut’s Institute of Technology Ladkrabang, School of Engineering, Bangkok 10520, Thailand; (T.K.); (S.V.)
| | - Sarinporn Visitsattapongse
- King Mongkut’s Institute of Technology Ladkrabang, School of Engineering, Bangkok 10520, Thailand; (T.K.); (S.V.)
| | - Hisayuki Aoyama
- Faculty of Engineering, The University of Electro-Communications, Tokyo 182-8585, Japan;
| | - Chuchart Pintavirooj
- King Mongkut’s Institute of Technology Ladkrabang, School of Engineering, Bangkok 10520, Thailand; (T.K.); (S.V.)
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Asymmetric Gait Analysis Using a DTW Algorithm with Combined Gyroscope and Pressure Sensor. SENSORS 2021; 21:s21113750. [PMID: 34071372 PMCID: PMC8199135 DOI: 10.3390/s21113750] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Revised: 05/20/2021] [Accepted: 05/27/2021] [Indexed: 02/02/2023]
Abstract
Walking is one of the most basic human activities. Various diseases may be caused by abnormal walking, and abnormal walking is mostly caused by disease. There are various characteristics of abnormal walking, but in general, it can be judged as asymmetric walking. Generally, spatiotemporal parameters can be used to determine asymmetric walking. The spatiotemporal parameter has the disadvantage that it does not consider the influence of the diversity of patterns and the walking speed. Therefore, in this paper, we propose a method to analyze asymmetric walking using Dynamic Time Warping (DTW) distance, a time series analysis method. The DTW distance was obtained by combining gyroscope data and pressure data. The experiment was carried out by performing symmetrical walking and asymmetrical walking, and asymmetric walking was performed as a simulation of hemiplegic walking by fixing one ankle using an auxiliary device. The proposed method was compared with the existing asymmetric gait analysis method. As a result of the experiment, a p-value lower than 0.05 was obtained, which proved that there was a statistically significant difference.
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Plantar Pressure Variability and Asymmetry in Elderly Performing 60-Minute Treadmill Brisk-Walking: Paving the Way towards Fatigue-Induced Instability Assessment Using Wearable In-Shoe Pressure Sensors. SENSORS 2021; 21:s21093217. [PMID: 34066398 PMCID: PMC8124239 DOI: 10.3390/s21093217] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Revised: 04/21/2021] [Accepted: 04/26/2021] [Indexed: 12/13/2022]
Abstract
Evaluation of potential fatigue for the elderly could minimize their risk of injury and thus encourage them to do more physical exercises. Fatigue-related gait instability was often assessed by the changes of joint kinematics, whilst planar pressure variability and asymmetry parameters may complement and provide better estimation. We hypothesized that fatigue condition (induced by the treadmill brisk-walking task) would lead to instability and could be reflected by the variability and asymmetry of plantar pressure. Fifteen elderly adults participated in the 60-min brisk walking trial on a treadmill without a pause, which could ensure that the fatigue-inducing effect is continuous and participants will not recover halfway. The plantar pressure data were extracted at baseline, the 30th minute, and the 60th minute. The median of contact time, peak pressure, and pressure-time integrals in each plantar region was calculated, in addition to their asymmetry and variability. After 60 min of brisk walking, there were significant increases in peak pressure at the medial and lateral arch regions, and central metatarsal regions, in addition to their impulses (p < 0.05). In addition, the variability of plantar pressure at the medial arch was significantly increased (p < 0.05), but their asymmetry was decreased. On the other hand, the contact time was significantly increased at all plantar regions (p < 0.05). The weakened muscle control and shock absorption upon fatigue could be the reason for the increased peak pressure, impulse, and variability, while the improved symmetry and prolonged plantar contact time could be a compensatory mechanism to restore stability. The outcome of this study can facilitate the development of gait instability or fatigue assessment using wearable in-shoe pressure sensors.
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Cho YJ, Lee C, Lee JH, Kyung MG, Lee KH, Lee DY. The difference of in-shoe plantar pressure between level walking and stair walking in healthy males. J Biomech 2021; 122:110446. [PMID: 33933862 DOI: 10.1016/j.jbiomech.2021.110446] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2020] [Revised: 03/18/2021] [Accepted: 04/12/2021] [Indexed: 11/16/2022]
Abstract
Stair walking is more demanding locomotion than level walking and can aggravate discomfort of the foot. The purpose of this study is to analyze plantar pressure distribution and pressure patterns during gait cycle at stair walking compared to level walking. Thirty-five healthy males with 23.4 ± 2 years old were included in this study after examining normality. They performed level walking, stair ascending, and descending in same type of shoes. Measurements of in-shoe plantar pressure including peak pressure, pressure-time integral were done by Pedar-X system, masked 7 regions. Also, pressures in each region throughout the gait cycle were analyzed from each type of walking. Statistical analysis was performed using repeated measure one way analysis of variance. Peak pressure in all regions except for the midfoot was higher during level walking than stair walking. Pressure-time integral in the forefoot, midfoot during stair ascending, and the forefoot during stair descending was higher than level walking. In gait cycle, first peak was produced in the heel and the second peak was produced in the hallux during level walking, whereas during stair ascent, the heel and midfoot were in first peak, and the second peak was in the hallux. During stair descent, the first peak were in the forefoot and the midfoot, and the second peak was in the forefoot. In healthy young male adults, forefoot and midfoot are significant regions in the way that they have higher pressure burdens than other foot regions during stair walking.
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Affiliation(s)
- Yun Jae Cho
- Department of Orthopedic Surgery, Han-il General Hospital, Seoul, South Korea.
| | - Choongho Lee
- Department of Orthopedic Surgery, Seoul National University Hospital, Seoul, South Korea.
| | - Jae Hee Lee
- Department of Orthopedic Surgery, Seoul National University Hospital, Seoul, South Korea.
| | - Min Gyu Kyung
- Department of Orthopedic Surgery, Seoul National University Hospital, Seoul, South Korea.
| | - Kyung Hwan Lee
- Department of Orthopedic Surgery, Seoul National University Hospital, Seoul, South Korea.
| | - Dong Yeon Lee
- Department of Orthopedic Surgery, Seoul National University Hospital, Seoul, South Korea.
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Vulnerability of the foot's morphological structure to deformities caused by foot loading paradigm in school-aged children: a cross-sectional study. Sci Rep 2021; 11:2749. [PMID: 33531593 PMCID: PMC7854665 DOI: 10.1038/s41598-021-82475-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Accepted: 01/20/2021] [Indexed: 11/29/2022] Open
Abstract
The study aimed to assess the association between the key predictive foot structure variables and its loading paradigm in 625 school-aged children. Clinical appraisal relied primarily on having the plantar parts of their feet comprehensively assessed with Podoscan 2D Foot CAD, and a dynamometer platform, the research tools of choice widely acknowledged for their overall accuracy and reliability, with a view to determining the distribution of respective foot loads, as well as addressing both balance and gait issues. The Clarke's angle, Wejsflog index, length and width of the feet, regardless of gender, proved the key predictive variables for the foot-loading paradigm. Notably the Clarke's angle, construed the most sensitive variable in assessing flat-footedness, offered an extra added value in overall investigative effort. The actual design of the study protocol effectively complements a standard clinical assessment procedure, whereas by comprehensively addressing those variables, it is also believed to aid clinicians in gaining an extra, hands-on, diagnostic potential, so that any teenagers exposed to the highest risk of developing foot deformities could effectively be identified through pertinent screening tests, and consequently offered a task-oriented, therapeutic management, specifically aimed at preventing potential postural complaints in later life.
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Plantar Pressure Evaluation during the Season in Five Basketball Movements. APPLIED SCIENCES-BASEL 2020. [DOI: 10.3390/app10238691] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Sports activity is extremely important in the health context, with a clear motivation for its practice. One of the sports that involve more athletes is basketball, where the human body undergoes rapid reactions, emphasizing the contact of the foot with the ground. The main goal of the present study is to evaluate the distribution of plantar pressure in five different basketball movements. Supported by a group of nine volunteer female athletes from a senior basketball team, a data acquisition protocol was defined to identify the changes that occur throughout the sports season. In this study, the maximum values of plantar pressure were evaluated for both feet. The five movements that were defined and studied are all movements that might be performed during the basketball practice period. To guarantee the necessary conditions of data reliability and repeatability, at least seven repetitions were performed for each movement, which occurred at two different moments of the sports season: at the beginning of the competition in November, and at season peak, four months later, in March. Overall, the results obtained did not present statistically significant changes between the two seasons in this study. However, a slight decrease was observed throughout the sporting season for all movements, except for the rebound, where there was a contrary evaluation. Additionally, athletes with a higher level of experience show higher values of plantar pressure than less experienced athletes.
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Fang K, Wang R, Zhang H, Zhou L, Xu T, Xiao Y, Zhou Y, Gao G, Chen J, Liu D, Ai F, Fu J. Mechano-Responsive, Tough, and Antibacterial Zwitterionic Hydrogels with Controllable Drug Release for Wound Healing Applications. ACS APPLIED MATERIALS & INTERFACES 2020; 12:52307-52318. [PMID: 33183010 DOI: 10.1021/acsami.0c13009] [Citation(s) in RCA: 78] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Acute wounds subject to frequent deformations are difficult to be treated because the healing process was easily interfered by external mechanical forces. Traditional wound dressings have limited efficacy because of their poor mechanical properties and skin adhesiveness and difficulty in the delivery of therapeutic drugs effectively. As such, tough and skin-adhesive wound dressings with sustainable and stimuli-responsive drug release properties for treatment of those wounds are highly desirable. For this purpose, we have developed a mechano-responsive poly(sulfobetaine methacrylate) hydrogel which aims to control the delivery of antibiotic drug upon application of mechanical forces. Diacrylated Pluronic F127 micelles were used as a macro-cross-linker of the hydrogel and loaded with hydrophobic antimicrobial drugs. The micelle-cross-linked hydrogel has excellent mechanical properties, with the ultimate tensile strength and tensile strain of up to 112 kPa and 1420%, respectively, and compressive stress of up to 1.41 MPa. Adhesiveness of the hydrogel to the skin tissue was ∼6 kPa, and it did not decrease significantly after repetitive adhesion cycles. Protein adsorption on the hydrogel was significantly inhibited compared to that on commercial wound dressings. Because of the mechano-responsive deformation of micelles, the release of drug from the hydrogel could be precisely controlled by the extent and cycles of mechanical loading and unloading, endowing the hydrogel with superior antibacterial property against both Gram-positive and Gram-negative bacteria. In addition, drug penetration into the skin tissue was enhanced by mechanical stress applied to the hydrogel. The micelle-cross-linked zwitterionic hydrogel also showed good cell biocompatibility, negligible skin irritation, and healing capacity to acute skin wounds in mice. Such a tough mechano-responsive hydrogel holds great promise as wound dressings for acute wounds subjected to frequent movements.
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Affiliation(s)
- Kun Fang
- School of Mechatronics Engineering, Nanchang University, Nanchang 330031, China
- Cixi Institute of Biomedical Engineering, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Cixi, Ningbo 315300, China
| | - Rong Wang
- Cixi Institute of Biomedical Engineering, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Cixi, Ningbo 315300, China
| | - Hua Zhang
- Cixi Institute of Biomedical Engineering, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Cixi, Ningbo 315300, China
| | - Linjie Zhou
- Cixi Institute of Biomedical Engineering, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Cixi, Ningbo 315300, China
| | - Ting Xu
- Cixi Institute of Biomedical Engineering, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Cixi, Ningbo 315300, China
| | - Ying Xiao
- Cixi Institute of Biomedical Engineering, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Cixi, Ningbo 315300, China
| | - Yang Zhou
- Cixi Institute of Biomedical Engineering, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Cixi, Ningbo 315300, China
| | - Guorong Gao
- Cixi Institute of Biomedical Engineering, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Cixi, Ningbo 315300, China
| | - Jing Chen
- Cixi Institute of Biomedical Engineering, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Cixi, Ningbo 315300, China
| | - Donglei Liu
- School of Mechatronics Engineering, Nanchang University, Nanchang 330031, China
| | - Fanrong Ai
- School of Mechatronics Engineering, Nanchang University, Nanchang 330031, China
| | - Jun Fu
- School of Materials Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China
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McKnight M, Tabor J, Agcayazi T, Fleming A, Ghosh TK, Huang H, Bozkurt A. Fully Textile Insole Seam-Line for Multimodal Sensor Mapping. IEEE SENSORS JOURNAL 2020; 20:10145-10153. [DOI: 10.1109/jsen.2020.2990627] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
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A Simple Foot Plantar Pressure Measurement Platform System Using Force-Sensing Resistors. APPLIED SYSTEM INNOVATION 2020. [DOI: 10.3390/asi3030033] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Generally, there are two types of working style, i.e., some people work in sitting conditions, and the remaining work mostly in a standing position. For people working in a standing position, they can spend hours in a day doing their work standing. These people do not realize that it can cause medical issues, especially for the feet, namely biometric problems. In addition, several doctors in Indonesia are already aware of this issue and state that the biometric problems faced by those kinds of people can be predicted from the load distribution on the foot. However, the tool used by the doctors in Indonesia to measure biometric problems is not a digital tool. Therefore it is very difficult to measure and predict the biometric problems quantitatively. This study aims to develop a low-cost static load measuring device using force-sensing resistor (FSR) sensors. The measuring instrument is designed in the form of a pressure plate platform which consist of 30 FSR 402 sensors. The sensors are placed right underneath the display area of the foot, 15 sensors on the soles of the left and right feet. Ten students from the Department of Mechanical Engineering, Diponegoro University (five men and five women) were asked to stand on the platform. Each subject also measured foot length (FL) to estimate shoe size, foot area contact (FAC) for validation between genders, and foot type using the digital footprint tools. From the results of measurements obtained for the left foot in the medial mid foot area, i.e., in sensors 5 and 7, not exposed to the load, on almost all subjects except subject number 3 with a load of 0.196 kg on sensor 7. The highest average load occurs in the heel area i.e., sensor 1 measured 0.713 kg and the smallest average load occurs in the five sensors, with 0 kg. A static load gauge that is designed to be used to measure each leg area for subjects with a shoe size of 40–42 with low price to be held in hospital-orthopedic hospitals and biomechanical research centers.
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Merry K, MacPherson M, Macdonald E, Ryan M, Park EJ, Sparrey CJ. Differentiating Sitting, Standing, and Walking Through Regional Plantar Pressure Characteristics. J Biomech Eng 2020; 142:041004. [PMID: 31581289 DOI: 10.1115/1.4045049] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Indexed: 12/20/2022]
Abstract
Prolonged static weight bearing (WBR) is thought to aggravate plantar heel pain and is common in the workplace, which may put employees at greater risk of developing plantar heel pain. However, objective measures of physical activity and sedentary behaviors in the workplace are lacking, making it difficult to establish or refute the connection between work exposure and plantar heel pain. Characterizing loading patterns during common workplace postures will enhance the understanding of foot function and inform the development of new measurement tools. Plantar pressure data during periods of sitting, standing, and walking were measured in ten healthy participants using the F-Scan in-shoe measurement system (Tekscan Inc, Boston, MA). Peak and average pressure, peak and average contact area, and average pressure differential were analyzed in ten different regions of the foot. A two-way repeated measures analysis of variance (ANOVA) assessed the posture by foot region interaction for each measurement parameter; significant effects of posture by foot region were identified for all five measurement parameters. Ten foot region by measurement parameter combinations were found to significantly differentiate all three postures simultaneously; seven used pressure measures to differentiate while three used area measures. The heel, lateral midfoot (LM), and medial and central forefoot (CFF) encompassed nine of ten areas capable of differentiating all postures simultaneously. This work demonstrates that plantar pressure is a viable means to characterize and differentiate three common workplace postures. The results of this study can inform the development of measurement tools for quantifying posture duration at work.
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Affiliation(s)
- Kohle Merry
- Mechatronic Systems Engineering, Simon Fraser University, 250-13450 102 Avenue, Surrey, BC V3T 0A3, Canada
| | - Megan MacPherson
- Health and Exercise Science, University of British Columbia, 1147 Research Road, Kelowna, BC V1V 1V7, Canada
| | - Evan Macdonald
- Mechatronic Systems Engineering, Simon Fraser University, 250-13450 102 Avenue, Surrey, BC V3T 0A3, Canada
| | - Michael Ryan
- Biomedical Physiology and Kinesiology, Simon Fraser University, 8888 University Drive, Burnaby, BC V5A 1S6, Canada; Kintec Footlabs Inc, 13465 King George Boulevard, Surrey, BC V3T 2T8, Canada
| | - Edward J Park
- Mechatronic Systems Engineering, Simon Fraser University, 250-13450 102 Avenue, Surrey, BC V3T 0A3, Canada
| | - Carolyn J Sparrey
- Mechatronic Systems Engineering, Simon Fraser University, 250-13450 102 Avenue, Surrey, BC V3T 0A3, Canada
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Bravo-Sánchez A, Abián-Vicén J, Jiménez F, Abián P. Influence of badminton practice on calcaneal bone stiffness and plantar pressure. PHYSICIAN SPORTSMED 2020; 48:98-104. [PMID: 31232640 DOI: 10.1080/00913847.2019.1635050] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Objectives: The aim of this study was to analyze the plantar pressures and bone stiffness of the calcaneus in badminton players compare to healthy participants, as well as to detect possible asymmetries and chronic adaptations derived from the prolonged practice of badminton.Methods: Twenty-two badminton players (35.2 ± 13.6 years, 169.4 ± 8.2 cm, 67.6 ± 13.7 kg) and 30 healthy controls (32.2 ± 12.8 years, 170.7 ± 9.5 cm, 66.25 ± 14.84 kg) volunteered to participate in this investigation. A Footwork® Pro pressure platform was used to study plantar pressures and an Achilles® bone scanner was used to record the bone stiffness of the calcaneus. The variables analyzed were plantar surface, percentage of force per area (forefoot and hindfoot), distance between the center of pressure and the projection of the center of mass in standing, and calcaneal bone stiffness.Results: The values of bone stiffness of the calcaneus were higher in badminton players than control group in the dominant lower limb (Badminton = 114.32 ± 18.97 U.A. vs. Control = 102.07 ± 16.36 U.A.; p = 0.019) and non-dominant lower limb (Badminton = 115.12 ± 21.95 U.A. vs Control = 101.37 ± 15.72 U.A.; p = 0.014). Badminton players showed asymmetric values in mean pressure (dominant = 35.41 ± 6.05 Kpa vs. non-dominant = 39.21 ± 6.54 Kpa; p = 0.011) and distance among center of pressure of each foot and center of mass (dominant = 11.28 ± 1.65 cm vs. non-dominant = 10.48 ± 1.63 cm; p = 0.025).Conclusions: The calcaneal stiffness of the badminton players was higher than control group, which places badminton in the category of osteogenic sports. The badminton players showed an asymmetric pattern during the static balance, which may be an indicative of asymmetries derived from the continued practice of badminton.
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Affiliation(s)
- Alfredo Bravo-Sánchez
- Performance and Sport Rehabilitation Laboratory, Faculty of Sport Sciences, University of Castilla-La Mancha, Toledo, Spain
| | - Javier Abián-Vicén
- Performance and Sport Rehabilitation Laboratory, Faculty of Sport Sciences, University of Castilla-La Mancha, Toledo, Spain
| | - Fernando Jiménez
- Performance and Sport Rehabilitation Laboratory, Faculty of Sport Sciences, University of Castilla-La Mancha, Toledo, Spain
| | - Pablo Abián
- Faculty of Humanities and Social Sciences, Comillas Pontifical University, Madrid, Spain
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Neves JCDJ, Cibinello FU, Valenciano PJ, Fujisawa DS. Influência do arco longitudinal medial na distribuição plantar e na flexibilidade posterior. FISIOTERAPIA E PESQUISA 2020. [DOI: 10.1590/1809-2950/18022427012020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
RESUMO O objetivo deste estudo foi verificar se a formação do arco longitudinal do pé interfere na distribuição da pressão plantar e na flexibilidade dos músculos posteriores da coxa. O método de estudo foi transversal e as impressões plantares foram obtidas usando o plantígrafo e analisadas segundo o método Viladot. A distribuição plantar e a flexibilidade foram avaliadas pela baropodometria e pelo banco de Wells, respectivamente. Foi observado que crianças com pés cavos apresentam maior flexibilidade quando comparadas às que têm o pé normal (p=0,02); e também que pés cavos apresentam maior pressão, ou seja, maior sobrecarga em calcâneo quando comparados àqueles com o arco plantar normal (p=0,02 membro inferior direito e p=0,03 membro inferior esquerdo). A avaliação do arco longitudinal medial mostra que crianças com pés cavos apresentam maior flexibilidade dos músculos posteriores de membro inferior. Os pés cavos também estão associados com maior descarga de peso em região de calcâneo.
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Kołcz A, Główka N, Kowal M, Paprocka-Borowicz M. Baropodometric evaluation of foot load distribution during gait in the group of professionally active nurses. J Occup Health 2019; 62:e12102. [PMID: 31837089 PMCID: PMC6970405 DOI: 10.1002/1348-9585.12102] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Revised: 10/25/2019] [Accepted: 11/06/2019] [Indexed: 11/07/2022] Open
Abstract
OBJECTIVES Nurses are extremely exposed to musculoskeletal overloads. Prolonged standing postural balance distributions, functional deficits and pain may affect the symmetry of the load on the feet. The study aimed to assess the distribution of foot load during gait among nurses. METHODS The sample of this prospective and observational study consisted of 37 female nurses with mean age of 39 years. The Nordic Musculoskeletal Questionnaire (NMQ) was used to evaluate musculoskeletal disturbances and baropodometric gait analysis (BGA) was performed to register distribution of foot load during gait. RESULTS We showed that 68% of nurses declare that they know the principles of workplace ergonomics, but only 14% comply with them. NMQ results indicate that as many as 73% of the respondents feel ailments in the "lower back" area. An asymmetry was observed in the load of IV-V of the metatarsal head between the left and right foot (P = .000) and in the load of the left and right lateral part of the heel (P = .028) in the BGA test. Correlations between ailments occurring in the neck area and loading of the lateral arch of the right foot (P = .032) were found. Moreover, the load in this area correlated positively with the occurrence of "lower back" pain (P = .045). CONCLUSIONS Nurses have asymmetric distribution of foot load during gait, which results in a discrepancy between the loads on the three main support points of the foot and which may affect nurses' work productivity.
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Affiliation(s)
- Anna Kołcz
- Laboratory of Ergonomics and Biomedical Monitoring, Wroclaw Medical University, Wroclaw, Poland
| | - Natalia Główka
- Laboratory of Ergonomics and Biomedical Monitoring, Wroclaw Medical University, Wroclaw, Poland
| | - Mateusz Kowal
- Department of Physiotherapy, Wroclaw Medical University, Wroclaw, Poland
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IS MUSCULAR AND FUNCTIONAL PERFORMANCE RELATED TO GAIT SYMMETRY IN OLDER ADULTS? A SYSTEMATIC REVIEW. Arch Gerontol Geriatr 2019; 84:103899. [PMID: 31220618 DOI: 10.1016/j.archger.2019.103899] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2019] [Revised: 05/29/2019] [Accepted: 06/09/2019] [Indexed: 11/23/2022]
Abstract
BACKGROUND Gait asymmetries are a matter of discussion concerning gait adaptation in older adults. While most studies perform unilateral gait assessments, the hypothesis that asymmetry in gait biomechanics is influenced by muscular and functional performance in older people needs to be confirmed. PURPOSE Here we performed a systematic review (CRD42018093189) to discuss the relationship between muscular and functional performance and gait asymmetries in older adults. MATERIALS AND METHODS Searches were performed using Medline via Pubmed, Scopus, PEDro, Cochrane Central, and Lilacs databases. Studies investigating leg asymmetries during overground locomotion and recording kinetics, kinematics or muscular activation parameters to determine at least one muscular or functional parameter were included. RESULTS Findings show that gait asymmetries, especially in step temporal parameters, are mainly related to functional outcomes, but the relationship with muscular performance was not possible to determine. CONCLUSIONS The relationship of gait asymmetry with muscular performance is still unknown, and there is a lack of investigations. Improvements in performance of functional tasks lead to a more symmetric gait.
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İlhan Odabaş H, Bulgan Ç, Bingül BM, Sarpyener K. The evaluation of foot pressure and postural structure of national golfers. ACTA ORTHOPAEDICA ET TRAUMATOLOGICA TURCICA 2019; 53:150-153. [PMID: 30782452 PMCID: PMC6506813 DOI: 10.1016/j.aott.2019.02.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/03/2017] [Revised: 01/15/2019] [Accepted: 02/05/2019] [Indexed: 11/26/2022]
Abstract
Objective The aim of this study was to perform the static and dynamic biomechanical assessment of postural structure and analyze variations of foot pressure in elite golfers. Methods A total of 8 golfers (3 female, mean age 15.33 ± 0.57 years; mean height 167 ± 3.61 cm and mean weight 59.3 ± 11.71 kg; 5 male, mean age 17 ± 0.83 years; mean height 177.2 ± 8.61 cm; mean weight 72.8 ± 15.61 kg) from Turkish National Team were participated to this study. Digital Biometry Images Scanning (DBIS) system was used for BioPostural analyses. All participants were applied Modular Electronic Baropodometric test for foot pressure evaluation and Stabilometry for body balance evaluation. Results were analyzed by SPSS 16.0 (SPSS Inc., Chicago, IL, USA) program, using Wilcoxon test. Results In static evaluation, there were significant differences in forefoot and rearfoot surface (cm2) (p < 0.05); forefoot and rearfoot load (%) (p < 0.05); forefoot and rearfoot weight ratio (%) (p < 0.05) and foot angle (p < 0.05). In dynamic evaluation, there were significant differences in right and left foot surface and load values (p < 0.05). The golfers dominant foot values were higher than non-dominant foot and also the balance parameters were found to be high (p < 0.05). The BPI Static mean value of the golfers were 7 points. The BPI Dynamic mean value of the golfers were 29 points. Also the golfers’ Stabilometric (Balance) Evaluation results were 20 points, whereas the norm values ranged from 0 to 10. Conclusion Our results suggest that static and dynamic postural structure parameters are very important for performances and injuries of the golfers. It is believed that these differences were due to the weight transfer applied especially in the swing motion at the moment of impact. Level of Evidence Level IV, Diagnostic Study.
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Design and Accuracy of an Instrumented Insole Using Pressure Sensors for Step Count. SENSORS 2019; 19:s19050984. [PMID: 30813515 PMCID: PMC6427154 DOI: 10.3390/s19050984] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Revised: 02/16/2019] [Accepted: 02/21/2019] [Indexed: 12/28/2022]
Abstract
Despite the accessibility of several step count measurement systems, count accuracy in real environments remains a major challenge. Microelectromechanical systems and pressure sensors seem to present a potential solution for step count accuracy. The purpose of this study was to equip an insole with pressure sensors and to test a novel and potentially more accurate method of detecting steps. Methods: Five force-sensitive resistors (FSR) were integrated under the heel, the first, third, and fifth metatarsal heads and the great toe. This system was tested with twelve healthy participants at self-selected and maximal walking speeds in indoor and outdoor settings. Step counts were computed based on previously reported calculation methods, individual and averaged FSR-signals, and a new method: cumulative sum of all FSR-signals. These data were compared to a direct visual step count for accuracy analysis. Results: This system accurately detected steps with success rates ranging from 95.5 ± 3.5% to 98.5 ± 2.1% (indoor) and from 96.5 ± 3.9% to 98.0 ± 2.3% (outdoor) for self-selected walking speeds and from 98.1 ± 2.7% to 99.0 ± 0.7% (indoor) and 97.0 ± 6.2% to 99.4 ± 0.7% (outdoor) for maximal walking speeds. Cumulative sum of pressure signals during the stance phase showed high step detection accuracy (99.5 ± 0.7%–99.6 ± 0.4%) and appeared to be a valid method of step counting. Conclusions: The accuracy of step counts varied according to the calculation methods, with cumulative sum-based method being highly accurate.
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Kremer JA, Robison CI, Karcher DM. Growth Dependent Changes in Pressure Sensing Walkway Data for Turkeys. Front Vet Sci 2018; 5:241. [PMID: 30356777 PMCID: PMC6189478 DOI: 10.3389/fvets.2018.00241] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2018] [Accepted: 09/12/2018] [Indexed: 12/12/2022] Open
Abstract
Genetic selection for rapidly growing turkeys has created an unfavorable consequence impacting the skeletal system resulting in long bone distortions. These distortions have resulted in locomotor problems, gait abnormalities, leg weakness, or lameness issues. These effects raise welfare concerns along with animal agriculture inefficiency in the form of lost product. The purpose was to determine baseline gait and force distribution in visibly unimpaired growing turkey hens. Hendrix commercial turkey hen poults (n = 100) were placed on pine wood shavings providing 0.78 m2 per bird with ad libitum access to feed and water at the MSU Poultry Farm. Fifty hens were randomly selected at 5 weeks and identified with a leg band to ensure longitudinal data collection. The turkeys were walked across a pressure-sensing walkway (PSW, Tekscan, Boston, MA) and weighed at 5, 6, 8, and 10 weeks of age. PSW collected data on gait length, gait time, step force and step length, and the statistics were analyzed with SAS. Both temporospatial data, including step time and step length, and kinetic data, including peak downward force, and vertical impulse, were recorded. Body weight increased linearly with age (P < 0.001), demonstrating a typical growth pattern. Gait cycle time and peak vertical force (PVF) all displayed no difference between right and left sides, indicating that the hens had no detectable gait abnormalities. Gait velocity increased with age (P = 0.02) suggesting hens' growth impacted their gait velocity. The gait cycle time (P < 0.01) did not correspond with age. PVF increased linearly with age (P < 0.01) from 6 weeks (2.23 kg) to 10 weeks of age (5.91 kg). PVF/kg body weight (P < 0.01) increased from 6 weeks of age (96.9% BW) to 8 weeks of age (106%BW). Overall, the birds were not lame and some data was influenced by the hen's adjustment to the materials or stage of growth; in contrast, some temporospatial data did not coincide with age. The PSW could be used to detect locomotor issues in commercially produced turkey hens providing another tool for assessing well-being.
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Affiliation(s)
- Jody A Kremer
- Department of Animal Science, Michigan State University, East Lansing, MI, United States
| | - Cara I Robison
- Department of Animal Science, Michigan State University, East Lansing, MI, United States
| | - Darrin M Karcher
- Department of Animal Sciences, Purdue University, West Lafayette, IN, United States
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Region-specific constitutive modeling of the plantar soft tissue. Biomech Model Mechanobiol 2018; 17:1373-1388. [DOI: 10.1007/s10237-018-1032-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2017] [Accepted: 05/14/2018] [Indexed: 10/16/2022]
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Chow TH, Chen YS, Wang JC. Characteristics of Plantar Pressures and Related Pain Profiles in Elite Sprinters and Recreational Runners. J Am Podiatr Med Assoc 2018; 108:33-44. [PMID: 29547032 DOI: 10.7547/15-189] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
BACKGROUND Plantar pressure measurement is effective for assessing plantar loading and can be applied to evaluating foot performance. We sought to explore the characteristics of plantar pressures in elite sprinters and recreational runners during static standing and walking. METHODS Arch index (AI) values, regional plantar pressure distributions (PPDs), and footprint characteristics were examined in 80 elite sprinters and 90 recreational runners using an optical plantar pressure measurement system. Elite sprinters' pain profiles were examined to evaluate their most common pain areas. RESULTS In recreational runners, AI values in males were in the normal range and in females were high arch type. The AI values were significantly lower in elite sprinters than in recreational runners. In elite sprinters, particularly males, the static PPD of both feet was higher at the medial metatarsal bone and the lateral heel and lower at the medial and lateral longitudinal arches. Elite male sprinters' PPD of both feet was mainly transferred to the medial metatarsal bone and decreased at the lateral longitudinal arch and the medial heel during the midstance phase of walking. The lateral knee joint and biceps femoris were the most common sites of musculoskeletal pain in elite sprinters. CONCLUSIONS Elite sprinters' AI values could be classified as high arches, and their PPD tended to parallel the features of runners and high-arched runners. These findings correspond to the profile of patellofemoral pain syndrome (PFPS)-related plantar pressure. The pain profiles seemed to resonate with the symptoms of high-arched runners and PFPS. A possible link between high-arched runners and PFPS warrants further study.
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Affiliation(s)
- Tong-Hsien Chow
- Department of Leisure Sport and Health Management, St. John's University, New Taipei City, Taiwan
| | - Yih-Shyuan Chen
- Department of Digital Literature and Arts, St. John's University, New Taipei City, Taiwan
| | - Jia-Chang Wang
- Department of Mechanical Engineering/Institute of Mechatronic Engineering, National Taipei University of Technology, Taipei, Taiwan
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Villa-Parra AC, Delisle-Rodriguez D, Souza Lima J, Frizera-Neto A, Bastos T. Knee Impedance Modulation to Control an Active Orthosis Using Insole Sensors. SENSORS 2017; 17:s17122751. [PMID: 29182569 PMCID: PMC5750722 DOI: 10.3390/s17122751] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Revised: 11/19/2017] [Accepted: 11/22/2017] [Indexed: 12/30/2022]
Abstract
Robotic devices for rehabilitation and gait assistance have greatly advanced with the objective of improving both the mobility and quality of life of people with motion impairments. To encourage active participation of the user, the use of admittance control strategy is one of the most appropriate approaches, which requires methods for online adjustment of impedance components. Such approach is cited by the literature as a challenge to guaranteeing a suitable dynamic performance. This work proposes a method for online knee impedance modulation, which generates variable gains through the gait cycle according to the users' anthropometric data and gait sub-phases recognized with footswitch signals. This approach was evaluated in an active knee orthosis with three variable gain patterns to obtain a suitable condition to implement a stance controller: two different gain patterns to support the knee in stance phase, and a third pattern for gait without knee support. The knee angle and torque were measured during the experimental protocol to compare both temporospatial parameters and kinematics data with other studies of gait with knee exoskeletons. The users rated scores related to their satisfaction with both the device and controller through QUEST questionnaires. Experimental results showed that the admittance controller proposed here offered knee support in 50% of the gait cycle, and the walking speed was not significantly different between the three gain patterns (p = 0.067). A positive effect of the controller on users regarding safety during gait was found with a score of 4 in a scale of 5. Therefore, the approach demonstrates good performance to adjust impedance components providing knee support in stance phase.
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Affiliation(s)
- Ana Cecilia Villa-Parra
- Postgraduate Program in Electrical Engineering, Federal University of Espirito Santo, Vitoria 29075-910, Brazil.
- Biomedical Engineering Research Group GIIB, Universidad Politécnica Salesiana, Cuenca 010105, Ecuador.
| | - Denis Delisle-Rodriguez
- Postgraduate Program in Electrical Engineering, Federal University of Espirito Santo, Vitoria 29075-910, Brazil.
- Center of Medical Biophysics, University of Oriente, Santiago de Cuba 90500, Cuba.
| | - Jessica Souza Lima
- Postgraduate Program in Biotechnology, Universidade Federal do Espirito Santo, Vitoria 29043-900, Brazil.
| | - Anselmo Frizera-Neto
- Postgraduate Program in Electrical Engineering, Federal University of Espirito Santo, Vitoria 29075-910, Brazil.
| | - Teodiano Bastos
- Postgraduate Program in Electrical Engineering, Federal University of Espirito Santo, Vitoria 29075-910, Brazil.
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A Graphene-Based Flexible Pressure Sensor with Applications to Plantar Pressure Measurement and Gait Analysis. MATERIALS 2017; 10:ma10091068. [PMID: 28891991 PMCID: PMC5615722 DOI: 10.3390/ma10091068] [Citation(s) in RCA: 69] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/30/2017] [Revised: 08/21/2017] [Accepted: 09/08/2017] [Indexed: 11/16/2022]
Abstract
In the present study, we propose and develop a flexible pressure sensor based on the piezoresistive effect of multilayer graphene films on polyester textile. The pressure response results from the deformation of graphene conductive network structure and the changes in resistance. Here, we show that the graphene pressure sensor can achieve a sensitivity value of 0.012 kPa - 1 , the measurement range can be as high as 800 kPa, and the response time can reach to 50 ms. Subsequently, a stable in-shoe wireless plantar pressure measurement system is developed and dynamic pressure distribution is acquired in real-time. Overall, the graphene textile pressure sensor has the advantage of wide dynamic range, flexibility and comfort, which provides the high possibility for footwear evaluation, clinical gait analysis and pathological foot diagnosis.
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Ramirez-Bautista JA, Huerta-Ruelas JA, Chaparro-Cardenas SL, Hernandez-Zavala A. A Review in Detection and Monitoring Gait Disorders Using In-Shoe Plantar Measurement Systems. IEEE Rev Biomed Eng 2017; 10:299-309. [PMID: 28866600 DOI: 10.1109/rbme.2017.2747402] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Gait is an important part of our life, as it affects many daily activities. Special footwear is fundamental to obtain an ergonomic gait and to extract data for analysis. The plantar foot pressure can be employed to detect many kinds of disorders, suggest improvements in treatments, rehabilitation tasks, patient monitoring, development of orthopedic devices, and other applications. In recent years, attention to this topic has grown and is reflected in many works issued in both commercial and academic groups, and has focused on the development of devices for foot plantar pressure measurement with applications in medicine, sports, and research. First works on this subject appeared around 1963 and have continuously evolved with emerging technologies. This paper reviews the reported developments in the field of footwear-embedded sensors for gait measurement, monitoring, diagnosis, and analysis in rehabilitation. Future work is proposed to improve the field of measurement of the footprint with electronic devices.
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