Wearable technologies最新文献_第5页

Predictive control of musculotendon loads across fast and slow-twitch muscles in a simulated system with parallel actuation. 在平行驱动的模拟系统中对快慢肌腱负载进行预测控制。

IF 3.4

Wearable technologies Pub Date : 2025-02-20 eCollection Date: 2025-01-01 DOI: 10.1017/wtc.2025.1

Mahdi Nabipour, Gregory S Sawicki, Massimo Sartori

{"title":"Predictive control of musculotendon loads across fast and slow-twitch muscles in a simulated system with parallel actuation.","authors":"Mahdi Nabipour, Gregory S Sawicki, Massimo Sartori","doi":"10.1017/wtc.2025.1","DOIUrl":"10.1017/wtc.2025.1","url":null,"abstract":"Research in lower limb wearable robotic control has largely focused on reducing the metabolic cost of walking or compensating for a portion of the biological joint torque, for example, by applying support proportional to estimated biological joint torques. However, due to different musculotendon unit (MTU) contractile speed properties, less attention has been given to the development of wearable robotic controllers that can steer MTU dynamics directly. Therefore, closed-loop control of MTU dynamics needs to be robust across fiber phenotypes, that is ranging from slow type I to fast type IIx in humans. The ability to perform closed-loop control the in-vivo dynamics of MTUs could lead to a new class of wearable robots that can provide precise support to targeted MTUs for preventing onset of injury or providing precision rehabilitation to selected damaged tissues. In this paper, we introduce a novel closed-loop control framework that utilizes nonlinear model predictive control to keep the peak Achilles tendon force within predetermined boundaries during diverse range of cyclic force production simulations in the human ankle plantarflexors. This control framework employs a computationally efficient model comprising a modified Hill-type MTU contraction dynamics component and a model of the ankle joint with parallel actuation. Results indicate that the closed-form muscle-actuation model's computational time is in the order of microseconds and is robust to different muscle contraction velocity properties. Furthermore, the controller achieves tendon force control within a time frame below , aligning with the physiological electromechanical delay of the MTU and facilitating its potential for future real-world applications.","PeriodicalId":75318,"journal":{"name":"Wearable technologies","volume":"6 ","pages":"e8"},"PeriodicalIF":3.4,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11894420/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143607401","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Battery-free head orientation measurement using passive RFID tags. 使用无源 RFID 标签进行免电池头部方向测量。

IF 3.4

Wearable technologies Pub Date : 2025-02-17 eCollection Date: 2025-01-01 DOI: 10.1017/wtc.2024.26

Jeyeon Jo, Heeju T Park

{"title":"Battery-free head orientation measurement using passive RFID tags.","authors":"Jeyeon Jo, Heeju T Park","doi":"10.1017/wtc.2024.26","DOIUrl":"10.1017/wtc.2024.26","url":null,"abstract":"Real-time measurement of head rotation, a primary human body movement, offers potential advantages in rehabilitating head or neck motor disorders, promoting seamless human-robot interaction, and tracking the lateral glance of children with autism spectrum disorder for effective intervention. However, existing options such as cameras capturing the entire face or skin-attached sensors have limitations concerning privacy, safety, and/or usability. This research introduces a novel method that employs a battery-free RFID tag-based wearable sensor for monitoring head orientation, as a substitute for the existing options like camera. By attaching a pair of passive RFID tags to the front of the head at a specific distance from each other, the signal strength of each tag within the pair differs based on the discrepancy in distance from the RFID reader caused by head rotation. Important parameters including distance between the tags, distance from the reader, and tag types, are investigated to suggest optimal sensor design. In tests involving random head rotations by 10 healthy adults, there was a significant correlation between the orientation of the head and gaze in the yaw direction and the differences in signal strength from the sensor pairs. The correlation coefficients () were satisfactory, at 0.88 for head and 0.83 for left eye pupil orientations. However, the sensor failed to estimate pitch rotations for head and gaze, due to the insufficient vertical spacing between the tags. No demographic factors appeared to influence the results.","PeriodicalId":75318,"journal":{"name":"Wearable technologies","volume":"6 ","pages":"e7"},"PeriodicalIF":3.4,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11894406/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143607366","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Wearable CNT/PAni/fabric piezoresistive sensor for continuous blood pressure monitoring. 可穿戴CNT/聚苯胺/织物压阻式传感器，用于连续血压监测。

IF 3.4

Wearable technologies Pub Date : 2025-02-10 eCollection Date: 2025-01-01 DOI: 10.1017/wtc.2024.31

Milad Barati, Alireza Nikfarjam

{"title":"Wearable CNT/PAni/fabric piezoresistive sensor for continuous blood pressure monitoring.","authors":"Milad Barati, Alireza Nikfarjam","doi":"10.1017/wtc.2024.31","DOIUrl":"10.1017/wtc.2024.31","url":null,"abstract":"Wearable pressure sensors with high sensitivity, fast response time, and low detection limit have great potential for blood pressure monitoring and early diagnosis of hypertension. This article introduces a piezoresistive pressure sensor based on carbon nanotubes (CNTs), polyaniline (PAni), and fabric (CNT/PAni/fabric) for health monitoring applications. This sensor is made by using two layers of linen fabric coated with CNT and PAni. These layers are placed on a polyester fabric substrate. One of the coated layers has a mesh structure, which increases the sensitivity of the sensor and lowers its detection limit. The CNT/PAni/fabric sensor has a high sensitivity of 2.035 kPa-1 at pressures from 0 to 0.2 kPa, a response time of 290 ms, and a detection limit of 1.5 Pa. These features make it suitable for measuring blood pressure. The results obtained by measuring blood pressure using the pulse transit time method on four people, compared with the values obtained using the digital sphygmomanometer, show a discrepancy ranging between 0.019% and 1.62%. Also, the average error and standard deviation for the sensor measurement in systolic and diastolic pressures are 0.56 ± 0.33 and 0.57 ± 0.46, respectively, which shows that measurement with this sensor can be an alternative to existing devices.","PeriodicalId":75318,"journal":{"name":"Wearable technologies","volume":"6 ","pages":"e6"},"PeriodicalIF":3.4,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11810520/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143400759","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An interactive soft robotic hand-task training system with wireless task boards and daily objects on post-stroke rehabilitation. 一种具有无线任务板和日常物品的交互式软机器人手部任务训练系统。

IF 3.4

Wearable technologies Pub Date : 2025-02-03 eCollection Date: 2025-01-01 DOI: 10.1017/wtc.2024.10

Xiangqian Shi, Chengyu Yang, Pak Chung Lee, Disheng Xie, Zhongping Ye, Zheng Li, Raymond Kai-Yu Tong

{"title":"An interactive soft robotic hand-task training system with wireless task boards and daily objects on post-stroke rehabilitation.","authors":"Xiangqian Shi, Chengyu Yang, Pak Chung Lee, Disheng Xie, Zhongping Ye, Zheng Li, Raymond Kai-Yu Tong","doi":"10.1017/wtc.2024.10","DOIUrl":"10.1017/wtc.2024.10","url":null,"abstract":"We have developed an interactive system comprising a soft wearable robot hand and a wireless task board, facilitating the interaction between the hand and regular daily objects for task-oriented training in stroke rehabilitation. A ring-reinforced soft actuator (RSA) to accommodate different hand sizes and enable flexion and extension movements was introduced in this paper. Individually controlled finger actuators assist stroke patients during various grasping tasks. A wireless task board was developed to support the training, allowing for the placement of training objects and seamless interaction with the soft robotic hand. Evaluation with seven stroke subjects shows significant improvements in upper limb functions (FMA), hand-motor abilities (ARAT, BBT), and maximum grip strengths after 20 sessions of this task-oriented training. These improvements were observed to persist for at least 3 months post-training. The results demonstrate its potential to enhance stroke rehabilitation and promote hand-motor recovery. This lightweight, user-friendly interactive system facilitates frequent hand practice and easily integrates into regular rehabilitation therapy routines.","PeriodicalId":75318,"journal":{"name":"Wearable technologies","volume":"6 ","pages":"e4"},"PeriodicalIF":3.4,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11810511/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143400563","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

From the idea to the user: a pragmatic multifaceted approach to testing occupational exoskeletons. 从想法到用户：一个实用的多方面的方法来测试职业外骨骼。

IF 3.4

Wearable technologies Pub Date : 2025-01-30 eCollection Date: 2025-01-01 DOI: 10.1017/wtc.2024.28

Christian Di Natali, Tommaso Poliero, Matteo Sposito, Vasco Fanti, Sergio Leggieri, Darwin G Caldwell

{"title":"From the idea to the user: a pragmatic multifaceted approach to testing occupational exoskeletons.","authors":"Christian Di Natali, Tommaso Poliero, Matteo Sposito, Vasco Fanti, Sergio Leggieri, Darwin G Caldwell","doi":"10.1017/wtc.2024.28","DOIUrl":"10.1017/wtc.2024.28","url":null,"abstract":"Assessment of occupational exoskeletons should ideally include longitudinal and multistage studies in real working scenarios to prove their effectiveness and sustainability in real in-field contexts and to help generalize the findings for specific scenarios. This work presents a comprehensive assessment methodology implemented as a multistage experimental campaign for rail industry workers using a back-support exoskeleton (StreamEXO). This work demonstrates that a sector/task-specific exoskeleton developed to address work task-specific requirements generates beneficial performance and user experience results. The experimental work in this paper involves collecting data from nine workers over multiple days of testing. During this testing, workers did not report hindrances to their work operations, with an acceptance rate of 86%. In addition, worker fatigue was reduced by 16.9% as measured through metabolic consumption, and 51% when assessed by perceived effort. This work supports the hypothesis that sector/task-specific exoskeletons when tailored to meet the needs of workers and the work tasks can produce demonstrable benefits in real industrial sectors.","PeriodicalId":75318,"journal":{"name":"Wearable technologies","volume":"6 ","pages":"e5"},"PeriodicalIF":3.4,"publicationDate":"2025-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11810522/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143400628","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synergistic grasp analysis: A cross-sectional exploration using a multi-sensory data glove. 协同抓取分析：使用多感官数据手套的横断面探索。

IF 3.4

Wearable technologies Pub Date : 2025-01-23 eCollection Date: 2025-01-01 DOI: 10.1017/wtc.2024.25

Subhash Pratap, Kazuaki Ito, Shyamanta M Hazarika

{"title":"Synergistic grasp analysis: A cross-sectional exploration using a multi-sensory data glove.","authors":"Subhash Pratap, Kazuaki Ito, Shyamanta M Hazarika","doi":"10.1017/wtc.2024.25","DOIUrl":"10.1017/wtc.2024.25","url":null,"abstract":"This paper investigates hand grasping, a fundamental activity in daily living, by examining the forces and postures involved in the lift-and-hold phases of grasping. We introduce a novel multi-sensory data glove, integrated with resistive flex sensors and capacitive force sensors, to measure the intricate dynamics of hand movement. The study engaged five subjects to capture a comprehensive dataset that includes contact forces at the fingertips and joint angles, furnishing a detailed portrayal of grasp mechanics. Focusing on grasp synergies, our analysis delved into the quantitative relationships between the correlated forces among the fingers. By manipulating one variable at a time-either the object or the subject-our cross-sectional approach yields rich insights into the nature of grasp forces and angles. The correlation coefficients for finger pairs presented median values ranging from 0.5 to nearly 0.9, indicating varying degrees of inter-finger coordination, with the thumb-index and index-middle pairs exhibiting particularly high synergy. The findings, depicted through spider charts and correlation coefficients, reveal significant patterns of cooperative finger behavior. These insights are crucial for the advancement of hand mechanics understanding and have profound implications for the development of assistive technologies and rehabilitation devices.","PeriodicalId":75318,"journal":{"name":"Wearable technologies","volume":"6 ","pages":"e2"},"PeriodicalIF":3.4,"publicationDate":"2025-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11810514/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143400653","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A feasibility study on using soft insoles for estimating 3D ground reaction forces with incorporated 3D-printed foam-like sensors. 结合3D打印泡沫样传感器，使用软鞋垫估算3D地面反作用力的可行性研究。

IF 3.4

Wearable technologies Pub Date : 2025-01-23 eCollection Date: 2025-01-01 DOI: 10.1017/wtc.2024.23

Nick Willemstein, Saivimal Sridar, Herman van der Kooij, Ali Sadeghi

{"title":"A feasibility study on using soft insoles for estimating 3D ground reaction forces with incorporated 3D-printed foam-like sensors.","authors":"Nick Willemstein, Saivimal Sridar, Herman van der Kooij, Ali Sadeghi","doi":"10.1017/wtc.2024.23","DOIUrl":"10.1017/wtc.2024.23","url":null,"abstract":"Sensorized insoles provide a tool for gait studies and health monitoring during daily life. For users to accept such insoles, they need to be comfortable and lightweight. Previous research has demonstrated that sensorized insoles can estimate ground reaction forces (GRFs). However, these insoles often assemble commercial components restricting design freedom and customization. Within this work, we incorporated four 3D-printed soft foam-like sensors to sensorize an insole. To test the insoles, we had nine participants walk on an instrumented treadmill. The four sensors behaved in line with the expected change in pressure distribution during the gait cycle. A subset of this data was used to identify personalized Hammerstein-Wiener (HW) models to estimate the 3D GRFs while the others were used for validation. In addition, the identified HW models showed the best estimation performance (on average root mean squared (RMS) error 9.3%, =0.85 and mean absolute error (MAE) 7%) of the vertical, mediolateral, and anteroposterior GRFs, thereby showing that these sensors can estimate the resulting 3D force reasonably well. These results were comparable to or outperformed other works that used commercial force-sensing resistors with machine learning. Four participants participated in three trials over a week, which showed a decrease in estimation performance over time but stayed on average 11.35% RMS and 8.6% MAE after a week with the performance seeming consistent between days two and seven. These results show promise for using 3D-printed soft piezoresistive foam-like sensors with system identification regarding the viability for applications that require softness, lightweight, and customization such as wearable (force) sensors.","PeriodicalId":75318,"journal":{"name":"Wearable technologies","volume":"6 ","pages":"e3"},"PeriodicalIF":3.4,"publicationDate":"2025-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11810523/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143401016","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Learning dynamics of muscle synergies during non-biomimetic control maps. 非仿生控制地图中肌肉协同作用的学习动力学。

IF 3.4

Wearable technologies Pub Date : 2025-01-20 eCollection Date: 2025-01-01 DOI: 10.1017/wtc.2024.24

King Chun Tse, Patricia Capsi-Morales, Cristina Piazza

{"title":"Learning dynamics of muscle synergies during non-biomimetic control maps.","authors":"King Chun Tse, Patricia Capsi-Morales, Cristina Piazza","doi":"10.1017/wtc.2024.24","DOIUrl":"10.1017/wtc.2024.24","url":null,"abstract":"Advanced myoelectric prostheses feature multiple degrees of freedom (DoFs) and sophisticated control algorithms that interpret user motor intentions as commands. While enhancing their capability to assist users in a wide range of daily activities, these control solutions still pose challenges. Among them, the need for extensive learning periods and users' limited control proficiency. To investigate the relationship between these challenges and the limited alignment of such methods with human motor control strategies, we examine motor learning processes in two different control maps testing a synergistic myoelectric system. In particular, this work employs a DoF-wise synergies control algorithm tested in both intuitive and non-intuitive control mappings. Intuitive mapping aligns body movements with control actions to replicate natural limb control, whereas non-intuitive mapping (or non-biomimetic) lacks a direct correlation between aspects, allowing one body movement to influence multiple DoFs. The latter offers increased design flexibility through redundancy, which can be especially advantageous for individuals with motor disabilities. The study evaluates the effectiveness and learning process of both control mappings with 10 able-bodied participants. The results revealed distinct patterns observed while testing the two maps. Furthermore, muscle synergies exhibited greater stability and distinction by the end of the experiment, indicative of varied learning processes.","PeriodicalId":75318,"journal":{"name":"Wearable technologies","volume":"6 ","pages":"e1"},"PeriodicalIF":3.4,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11810517/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143400631","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Smart interfaces to assist the operator in the context of industry 4.0 with a 5S human-centric approach. 智能接口，以5S为中心，在工业4.0的背景下协助操作员。

IF 3.4

Wearable technologies Pub Date : 2024-12-23 eCollection Date: 2024-01-01 DOI: 10.1017/wtc.2024.17

Mario Rojas, Javier Maldonado-Romo, Juana Isabel Mendez, Pedro Ponce, Arturo Molina

{"title":"Smart interfaces to assist the operator in the context of industry 4.0 with a 5S human-centric approach.","authors":"Mario Rojas, Javier Maldonado-Romo, Juana Isabel Mendez, Pedro Ponce, Arturo Molina","doi":"10.1017/wtc.2024.17","DOIUrl":"10.1017/wtc.2024.17","url":null,"abstract":"This paper explores the integration of haptic gloves and virtual reality (VR) environments to enhance industrial training and operational efficiency within the framework of Industry 4.0 and Industry 5.0. It examines the alignment of these technologies with the Sustainable Development Goals (SDGs), mainly focusing on SDG 8 (Decent Work and Economic Growth) and SDG 9 (Industry, Innovation, and Infrastructure). By incorporating a human-centric approach, the study leverages haptic gloves to provide realistic feedback and immersive experiences in virtual training environments. The gloves enable intuitive interaction, enhancing the training efficacy and reducing real-world operational errors. Using the 5S principles-Social, Sustainable, Sensing, Smart, and Safe-this research evaluates the system's impact across various dimensions. The findings indicate significant improvements in user comfort, productivity, and overall well-being, alongside enhanced sustainability and operational efficiency. However, challenges related to realistic hand-object interactions and algorithmic enhancements were identified. The study underscores the importance of continuous improvement and cross-disciplinary collaboration to advance the usability and effectiveness of these technologies. Future research should focus on customization, AI-driven adaptability, sustainability, real-world scalability, and comprehensive impact assessment to further develop smart interfaces in industrial settings. This integration represents a transformative opportunity to enhance workplace safety, skills development, and contribute to global sustainable development goals.","PeriodicalId":75318,"journal":{"name":"Wearable technologies","volume":"5 ","pages":"e24"},"PeriodicalIF":3.4,"publicationDate":"2024-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11729524/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142985768","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The effect of active exoskeleton support with different lumbar-to-hip support ratios on spinal musculoskeletal loading and lumbar kinematics during lifting. 不同腰髋支撑比的主动外骨骼支撑对举重过程中脊柱肌肉骨骼负荷和腰椎运动学的影响。

IF 3.4

Wearable technologies Pub Date : 2024-12-23 eCollection Date: 2024-01-01 DOI: 10.1017/wtc.2024.7

Niels P Brouwer, Ali Tabasi, Feng Hu, Idsart Kingma, Wietse van Dijk, Mohamed Irfan Mohamed Refai, Herman van der Kooij, Jaap H van Dieën

{"title":"The effect of active exoskeleton support with different lumbar-to-hip support ratios on spinal musculoskeletal loading and lumbar kinematics during lifting.","authors":"Niels P Brouwer, Ali Tabasi, Feng Hu, Idsart Kingma, Wietse van Dijk, Mohamed Irfan Mohamed Refai, Herman van der Kooij, Jaap H van Dieën","doi":"10.1017/wtc.2024.7","DOIUrl":"10.1017/wtc.2024.7","url":null,"abstract":"While active back-support exoskeletons can reduce mechanical loading of the spine, current designs include only one pair of actuated hip joints combined with a rigid structure between the pelvis and trunk attachments, restricting lumbar flexion and consequently intended lifting behavior. This study presents a novel active exoskeleton including actuated lumbar and hip joints as well as subject-specific exoskeleton control based on a real-time active low-back moment estimation. We evaluated the effect of exoskeleton support with different lumbar-to-hip (L/H) support ratios on spine loading, lumbar kinematics, and back muscle electromyography (EMG). Eight healthy males lifted 15 kg loads using three techniques without exoskeleton (NOEXO) and with exoskeleton: minimal impedance mode (MINIMP), L/H support ratio in line with a typical L/H net moment ratio (R0.8), lower (R0.5) and higher (R2.0) L/H support ratio than R0.8, and a mechanically fixed lumbar joint (LF; simulating hip joint-only exoskeleton designs). EMG-driven musculoskeletal model results indicated that R0.8 and R0.5 yielded significant reductions in spinal loading (4-11%, p < .004) across techniques when compared to MINIMP, through reducing active moments (14-30%) while not affecting lumbar flexion and passive moments. R2.0 and LF significantly reduced spinal loading (8-17%, p < .001; 22-26%, p < .001, respectively), however significantly restricted lumbar flexion (3-18%, 24-27%, respectively) and the associated passive moments. An L/H support ratio in line with a typical L/H net moment ratio reduces spinal loading, while allowing normal lifting behavior. High L/H support ratios (e.g., in hip joint-only exoskeleton designs) yield reductions in spinal loading, however, restrict lifting behavior, typically perceived as hindrance.","PeriodicalId":75318,"journal":{"name":"Wearable technologies","volume":"5 ","pages":"e25"},"PeriodicalIF":3.4,"publicationDate":"2024-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11729479/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142985772","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0