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Artikel ; Online: Missing Data Statistics Provide Causal Insights into Data Loss in Diabetes Health Monitoring by Wearable Sensors.

Braem, Carlijn I R / Yavuz, Utku S / Hermens, Hermie J / Veltink, Peter H

2024 Band 24, Heft 5

Abstract: Background: Data loss in wearable sensors is an inevitable problem that leads to misrepresentation during diabetes health monitoring. We systematically investigated missing wearable sensors data to get causal insight into the mechanisms leading to ... ...

Abstract	Background: Data loss in wearable sensors is an inevitable problem that leads to misrepresentation during diabetes health monitoring. We systematically investigated missing wearable sensors data to get causal insight into the mechanisms leading to missing data. Methods: Two-week-long data from a continuous glucose monitor and a Fitbit activity tracker recording heart rate (HR) and step count in free-living patients with type 2 diabetes mellitus were used. The gap size distribution was fitted with a Planck distribution to test for missing not at random (MNAR) and a difference between distributions was tested with a Chi-squared test. Significant missing data dispersion over time was tested with the Kruskal-Wallis test and Dunn post hoc analysis. Results: Data from 77 subjects resulted in 73 cleaned glucose, 70 HR and 68 step count recordings. The glucose gap sizes followed a Planck distribution. HR and step count gap frequency differed significantly ( Conclusions: Our novel approach of investigating missing data statistics revealed the mechanisms for missing data in Fitbit and CGM data.
Mesh-Begriff(e)	Humans ; Diabetes Mellitus, Type 2 ; Fitness Trackers ; Glucose ; Blood Glucose ; Heart Rate
Chemische Substanzen	Glucose (IY9XDZ35W2) ; Blood Glucose
Sprache	Englisch
Erscheinungsdatum	2024-02-27
Erscheinungsland	Switzerland
Dokumenttyp	Journal Article
ZDB-ID	2052857-7
ISSN	1424-8220 ; 1424-8220
ISSN (online)	1424-8220
ISSN	1424-8220
DOI	10.3390/s24051526
Datenquelle	MEDical Literature Analysis and Retrieval System OnLINE

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Artikel ; Online: Estimation of Kinetics Using IMUs to Monitor and Aid in Clinical Decision-Making during ACL Rehabilitation: A Systematic Review.

Krishnakumar, Sanchana / van Beijnum, Bert-Jan F / Baten, Chris T M / Veltink, Peter H / Buurke, Jaap H

Sensors (Basel, Switzerland)

2024 Band 24, Heft 7

Abstract: After an ACL injury, rehabilitation consists of multiple phases, and progress between these phases is guided by subjective visual assessments of activities such as running, hopping, jump landing, etc. Estimation of objective kinetic measures like knee ... ...

Abstract	After an ACL injury, rehabilitation consists of multiple phases, and progress between these phases is guided by subjective visual assessments of activities such as running, hopping, jump landing, etc. Estimation of objective kinetic measures like knee joint moments and GRF during assessment can help physiotherapists gain insights on knee loading and tailor rehabilitation protocols. Conventional methods deployed to estimate kinetics require complex, expensive systems and are limited to laboratory settings. Alternatively, multiple algorithms have been proposed in the literature to estimate kinetics from kinematics measured using only IMUs. However, the knowledge about their accuracy and generalizability for patient populations is still limited. Therefore, this article aims to identify the available algorithms for the estimation of kinetic parameters using kinematics measured only from IMUs and to evaluate their applicability in ACL rehabilitation through a comprehensive systematic review. The papers identified through the search were categorized based on the modelling techniques and kinetic parameters of interest, and subsequently compared based on the accuracies achieved and applicability for ACL patients during rehabilitation. IMUs have exhibited potential in estimating kinetic parameters with good accuracy, particularly for sagittal movements in healthy cohorts. However, several shortcomings were identified and future directions for improvement have been proposed, including extension of proposed algorithms to accommodate multiplanar movements and validation of the proposed techniques in diverse patient populations and in particular the ACL population.
Mesh-Begriff(e)	Humans ; Clinical Decision-Making ; Algorithms ; Anterior Cruciate Ligament Injuries ; Health Status ; Kinetics
Sprache	Englisch
Erscheinungsdatum	2024-03-28
Erscheinungsland	Switzerland
Dokumenttyp	Systematic Review ; Journal Article ; Review
ZDB-ID	2052857-7
ISSN	1424-8220 ; 1424-8220
ISSN (online)	1424-8220
ISSN	1424-8220
DOI	10.3390/s24072163
Datenquelle	MEDical Literature Analysis and Retrieval System OnLINE

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Artikel ; Online: Quantifying and correcting for speed and stride frequency effects on running mechanics in fatiguing outdoor running.

Zandbergen, Marit A / Buurke, Jaap H / Veltink, Peter H / Reenalda, Jasper

Frontiers in sports and active living

2023 Band 5, Seite(n) 1085513

Abstract: Measuring impact-related quantities in running is of interest to improve the running technique. Many quantities are typically measured in a controlled laboratory setting, even though most runners run in uncontrolled outdoor environments. While monitoring ...

Abstract	Measuring impact-related quantities in running is of interest to improve the running technique. Many quantities are typically measured in a controlled laboratory setting, even though most runners run in uncontrolled outdoor environments. While monitoring running mechanics in an uncontrolled environment, a decrease in speed or stride frequency can mask fatigue-related changes in running mechanics. Hence, this study aimed to quantify and correct the subject-specific effects of running speed and stride frequency on changes in impact-related running mechanics during a fatiguing outdoor run. Seven runners ran a competitive marathon while peak tibial acceleration and knee angles were measured with inertial measurement units. Running speed was measured through sports watches. Median values over segments of 25 strides throughout the marathon were computed and used to create subject-specific multiple linear regression models. These models predicted peak tibial acceleration, knee angles at initial contact, and maximum stance phase knee flexion based on running speed and stride frequency. Data were corrected for individual speed and stride frequency effects during the marathon. The speed and stride frequency corrected and uncorrected data were divided into ten stages to investigate the effect of marathon stage on mechanical quantities. This study showed that running speed and stride frequency explained, on average, 20%-30% of the variance in peak tibial acceleration, knee angles at initial contact, and maximum stance phase knee angles while running in an uncontrolled setting. Regression coefficients for speed and stride frequency varied strongly between subjects. Speed and stride frequency corrected peak tibial acceleration, and maximum stance phase knee flexion increased throughout the marathon. At the same time, uncorrected maximum stance phase knee angles showed no significant differences between marathon stages due to a decrease in running speed. Hence, subject-specific effects of changes in speed and stride frequency influence the interpretation of running mechanics and are relevant when monitoring, or comparing the gait pattern between runs in uncontrolled environments.
Sprache	Englisch
Erscheinungsdatum	2023-04-17
Erscheinungsland	Switzerland
Dokumenttyp	Journal Article
ISSN	2624-9367
ISSN (online)	2624-9367
DOI	10.3389/fspor.2023.1085513
Datenquelle	MEDical Literature Analysis and Retrieval System OnLINE

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Artikel ; Online: Integrated UWB/MIMU Sensor System for Position Estimation towards an Accurate Analysis of Human Movement: A Technical Review.

Yogesh, Vinish / Buurke, Jaap H / Veltink, Peter H / Baten, Chris T M

Sensors (Basel, Switzerland)

2023 Band 23, Heft 16

Abstract: Integrated Ultra-wideband (UWB) and Magnetic Inertial Measurement Unit (MIMU) sensor systems have been gaining popularity for pedestrian tracking and indoor localization applications, mainly due to their complementary error characteristics that can be ... ...

Abstract	Integrated Ultra-wideband (UWB) and Magnetic Inertial Measurement Unit (MIMU) sensor systems have been gaining popularity for pedestrian tracking and indoor localization applications, mainly due to their complementary error characteristics that can be exploited to achieve higher accuracies via a data fusion approach. These integrated sensor systems have the potential for improving the ambulatory 3D analysis of human movement (estimating 3D kinematics of body segments and joints) over systems using only on-body MIMUs. For this, high accuracy is required in the estimation of the relative positions of all on-body integrated UWB/MIMU sensor modules. So far, these integrated UWB/MIMU sensors have not been reported to have been applied for full-body ambulatory 3D analysis of human movement. Also, no review articles have been found that have analyzed and summarized the methods integrating UWB and MIMU sensors for on-body applications. Therefore, a comprehensive analysis of this technology is essential to identify its potential for application in 3D analysis of human movement. This article thus aims to provide such a comprehensive analysis through a structured technical review of the methods integrating UWB and MIMU sensors for accurate position estimation in the context of the application for 3D analysis of human movement. The methods used for integration are all summarized along with the accuracies that are reported in the reviewed articles. In addition, the gaps that are required to be addressed for making this system applicable for the 3D analysis of human movement are discussed.
Mesh-Begriff(e)	Humans ; Movement ; Pedestrians ; Technology
Sprache	Englisch
Erscheinungsdatum	2023-08-19
Erscheinungsland	Switzerland
Dokumenttyp	Journal Article ; Review
ZDB-ID	2052857-7
ISSN	1424-8220 ; 1424-8220
ISSN (online)	1424-8220
ISSN	1424-8220
DOI	10.3390/s23167277
Datenquelle	MEDical Literature Analysis and Retrieval System OnLINE

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Artikel ; Online: 3D Tibial Acceleration and Consideration of 3D Angular Motion Using IMUs on Peak Tibial Acceleration and Impulse in Running.

VAN Middelaar, Robbert P / Zhang, Junhao / Veltink, Peter H / Reenalda, Jasper

Medicine and science in sports and exercise

2023 Band 55, Heft 12, Seite(n) 2253–2262

Abstract: Purpose: Peak tibial acceleration (PTA) is defined as the peak acceleration occurring shortly after initial contact, often used as an indirect measure of tibial load. As the tibia is a rotating segment around the ankle, angular velocity and angular ... ...

Abstract	Purpose: Peak tibial acceleration (PTA) is defined as the peak acceleration occurring shortly after initial contact, often used as an indirect measure of tibial load. As the tibia is a rotating segment around the ankle, angular velocity and angular acceleration should be included in PTA. This study aimed to quantify three-dimensional tibial acceleration components over two different sensor locations and three running speeds, to get a better understanding of the influence of centripetal and tangential accelerations on PTA typically measured in running. Furthermore, it explores tibial impulse as an alternative surrogate measure for tibial load. Methods: Fifteen participants ran 90 s on a treadmill at 2.8, 3.3, and 3.9 m·s -1 , with inertial measurement units (IMUs) located distally and proximally on the tibia. Results: Without the inclusion of rotational accelerations and gravity, no significant difference was found between axial PTA between both IMU locations, whereas in the tangential sagittal plane axis, there was a significant difference. Inclusion of rotational accelerations and gravity resulted in similar PTA estimates at the ankle for both IMU locations and caused a significant difference between PTA based on the distal IMU and PTA at the ankle. The impulse showed more consistent results between the proximal and distal IMU locations compared with axial PTA. Conclusions: Rotational acceleration of the tibia during stance differently impacted PTA measured proximally and distally at the tibia, indicating that rotational acceleration and gravity should be included in PTA estimates. Furthermore, peak acceleration values (such as PTA) are not always reliable when using IMUs because of inconsistent PTA proximally compared with distally on an individual level. Instead, impulse seems to be a more consistent surrogate measure for the tibial load.
Mesh-Begriff(e)	Humans ; Tibia ; Biomechanical Phenomena ; Lower Extremity ; Running ; Acceleration
Sprache	Englisch
Erscheinungsdatum	2023-07-26
Erscheinungsland	United States
Dokumenttyp	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	603994-7
ISSN	1530-0315 ; 0195-9131 ; 0025-7990
ISSN (online)	1530-0315
ISSN	0195-9131 ; 0025-7990
DOI	10.1249/MSS.0000000000003269
Datenquelle	MEDical Literature Analysis and Retrieval System OnLINE

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Artikel ; Online: Centroidal Moment Pivot for ambulatory estimation of relative feet and CoM movement post stroke: Portable Gait Lab

Refai, Mohamed Irfan Mohamed / Van Beijnum, Bert-Jan F / Buurke, Jaap H / Veltink, Peter H

IEEE ... International Conference on Rehabilitation Robotics : [proceedings

2022 Band 2022, Seite(n) 1–6

Abstract: Measuring gait and balance recovery is necessary post stroke. In an earlier study, we developed a minimal three Inertial Measurement Units (IMUs) system called Portable Gait Lab (PGL). The PGL used the Centroidal Moment Pivot (CMP) assumption to estimate ...

Abstract	Measuring gait and balance recovery is necessary post stroke. In an earlier study, we developed a minimal three Inertial Measurement Units (IMUs) system called Portable Gait Lab (PGL). The PGL used the Centroidal Moment Pivot (CMP) assumption to estimate relative foot and centre of mass (CoM) positions, and thereby estimate gait parameters in healthy participants. In this study, we validate the feasibility of the PGL to track foot and CoM trajectory during gait in four persons with chronic stroke. Spatiotemporal gait and balance measures were estimated from the foot and CoM trajectories, and compared with the reference ForceShoes™. Each participant made at least 20 steps, and the PGL was able to track foot and CoM trajectories with a root mean square of the differences with the reference of 2.9 ± 0.2 cm and 4.6 ± 3.6 cm. The distances between either foot at the end of the walking task, and step lengths were estimated by PGL with an average error with the reference of 1.98 ± 2.2 cm and 7.8 ± 0.1 cm respectively across participants. We show that our approach was able to estimate spatiotemporal and balance parameters related to gait quality in a clinically useful manner. We recommend conducting further studies to study the feasibility of using the PGL system for variable gait patterns measured post stroke.
Mesh-Begriff(e)	Biomechanical Phenomena ; Cytidine Monophosphate ; Foot ; Gait ; Humans ; Stroke ; Walking
Chemische Substanzen	Cytidine Monophosphate (F469818O25)
Sprache	Englisch
Erscheinungsdatum	2022-09-29
Erscheinungsland	United States
Dokumenttyp	Journal Article ; Research Support, Non-U.S. Gov't
ISSN	1945-7901
ISSN (online)	1945-7901
DOI	10.1109/ICORR55369.2022.9896526
Datenquelle	MEDical Literature Analysis and Retrieval System OnLINE

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Artikel ; Online: Development of inductive sensors for a robotic interface based on noninvasive tongue control.

Kirtas, Oguzhan / Veltink, Peter / Lontis, Romulus / Mohammadi, Mostafa / Andreasen Struijk, Lotte N S

IEEE ... International Conference on Rehabilitation Robotics : [proceedings

2022 Band 2022, Seite(n) 1–6

Abstract: Tongue based robotic interfaces have shown the potential to control assistive robotic devices developed for individuals with severe disabilities due to spinal cord injury. However, current tongue-robotic interfaces require invasive methods such as ... ...

Abstract	Tongue based robotic interfaces have shown the potential to control assistive robotic devices developed for individuals with severe disabilities due to spinal cord injury. However, current tongue-robotic interfaces require invasive methods such as piercing to attach an activation unit (AU) to the tongue. A noninvasive tongue interface concept, which used a frame integrated AU instead of a tongue attached AU, was previously proposed. However, there is a need for the development of compact one-piece sensor printed circuit boards (PCBs) to enable activation of all inductive sensors. In this study, we developed and tested four designs of compact one-piece sensor PCBs incorporating inductive sensors for the design of a noninvasive tongue-robotic interface. We measured electrical parameters of the developed sensors to detect activation and compared them with a sensor of the current version of the inductive tongue-computer interface (ITCI) by moving AUs with different contact surfaces at the surface of the sensors. Results showed that, the newly developed inductive sensors had higher and wider activation than the sensor of ITCI and the AU with a flat contact surface had 3.5 - 4 times higher activation than the AU with a spherical contact surface. A higher sensor activation can result in a higher signal to noise ratio and thus a higher AU tracking resolution.
Mesh-Begriff(e)	Equipment Design ; Humans ; Robotic Surgical Procedures ; Self-Help Devices ; Tongue/physiology ; User-Computer Interface
Sprache	Englisch
Erscheinungsdatum	2022-09-29
Erscheinungsland	United States
Dokumenttyp	Journal Article
ISSN	1945-7901
ISSN (online)	1945-7901
DOI	10.1109/ICORR55369.2022.9896548
Datenquelle	MEDical Literature Analysis and Retrieval System OnLINE

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Artikel ; Online: Effects of level running-induced fatigue on running kinematics: A systematic review and meta-analysis.

Zandbergen, Marit A / Marotta, Luca / Bulthuis, Roos / Buurke, Jaap H / Veltink, Peter H / Reenalda, Jasper

Gait & posture

2022 Band 99, Seite(n) 60–75

Abstract: Background: Runners have a high risk of acquiring a running-related injury. Understanding the mechanisms of impact force attenuation into the body when a runner fatigues might give insight into the role of running kinematics on the aetiology of overuse ... ...

Abstract	Background: Runners have a high risk of acquiring a running-related injury. Understanding the mechanisms of impact force attenuation into the body when a runner fatigues might give insight into the role of running kinematics on the aetiology of overuse injuries. Research questions: How do running kinematics change due to running-induced fatigue? And what is the influence of experience level on changes in running kinematics due to fatigue? Methods: Three electronic databases were searched: PubMed, Web of Science, and Scopus. This resulted in 33 articles and 19 kinematic quantities being included in this review. A quality assessment was performed on all included articles and meta-analyses were performed for 18 kinematic quantities. Results and significance: Main findings included an increase in peak acceleration at the tibia and a decrease in leg stiffness after a fatiguing protocol. Additionally, level running-induced fatigue increased knee flexion at initial contact and maximum knee flexion during swing. An increase in vertical centre of mass displacement was found in novice but not in experienced runners with fatigue. Overall, runners changed their gait pattern due to fatigue by moving to a smoother gait pattern (i.e. more knee flexion at initial contact and during swing, decreased leg stiffness). However, these changes were not sufficient to prevent an increase in peak accelerations at the tibia after a fatigue protocol. Large inter-individual differences in responses to fatigue were reported. Hence, it is recommended to investigate changes in running kinematics as a result of fatigue on a subject-specific level since group-level analysis might mask individual responses.
Mesh-Begriff(e)	Humans ; Biomechanical Phenomena/physiology ; Running/physiology ; Knee/physiology ; Muscle Fatigue/physiology ; Fatigue/etiology
Sprache	Englisch
Erscheinungsdatum	2022-10-12
Erscheinungsland	England
Dokumenttyp	Meta-Analysis ; Systematic Review ; Journal Article ; Review ; Research Support, Non-U.S. Gov't
ZDB-ID	1162323-8
ISSN	1879-2219 ; 0966-6362
ISSN (online)	1879-2219
ISSN	0966-6362
DOI	10.1016/j.gaitpost.2022.09.089
Datenquelle	MEDical Literature Analysis and Retrieval System OnLINE

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Verfügbar in ZB MED Köln/Königswinter

Zs.A 3804: Hefte anzeigen

Standort:
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Jg. 1995 - 2021: Lesesall (2.OG)
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Artikel: Editorial: Wearable sensing of movement quality after neurological disorders.

Mohamed Refai, Mohamed Irfan / van Beijnum, Bert-Jan F / Buurke, Jaap H / Shull, Peter B / Veltink, Peter H

Frontiers in physiology

2023 Band 14, Seite(n) 1156520

Sprache	Englisch
Erscheinungsdatum	2023-02-10
Erscheinungsland	Switzerland
Dokumenttyp	Editorial
ZDB-ID	2564217-0
ISSN	1664-042X
ISSN	1664-042X
DOI	10.3389/fphys.2023.1156520
Datenquelle	MEDical Literature Analysis and Retrieval System OnLINE

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Artikel ; Online: Peak tibial acceleration should not be used as indicator of tibial bone loading during running.

Zandbergen, Marit A / Ter Wengel, Xanthe J / van Middelaar, Robbert P / Buurke, Jaap H / Veltink, Peter H / Reenalda, Jasper

Sports biomechanics

2023 , Seite(n) 1–18

Abstract: Peak tibial acceleration (PTA) is a widely used indicator of tibial bone loading. Indirect bone loading measures are of interest to reduce the risk of stress fractures during running. However, tibial compressive forces are caused by both internal muscle ... ...

Abstract	Peak tibial acceleration (PTA) is a widely used indicator of tibial bone loading. Indirect bone loading measures are of interest to reduce the risk of stress fractures during running. However, tibial compressive forces are caused by both internal muscle forces and external ground reaction forces. PTA might reflect forces from outside the body, but likely not the compressive force from muscles on the tibial bone. Hence, the strength of the relationship between PTA and maximum tibial compression forces in rearfoot-striking runners was investigated. Twelve runners ran on an instrumented treadmill while tibial acceleration was captured with accelerometers. Force plate and inertial measurement unit data were spatially aligned with a novel method based on the centre of pressure crossing a virtual toe marker. The correlation coefficient between maximum tibial compression forces and PTA was 0.04 ± 0.14 with a range of -0.15 to +0.28. This study showed a very weak and non-significant correlation between PTA and maximum tibial compression forces while running on a level treadmill at a single speed. Hence, PTA as an indicator for tibial bone loading should be reconsidered, as PTA does not provide a complete picture of both internal and external compressive forces on the tibial bone. .
Sprache	Englisch
Erscheinungsdatum	2023-01-16
Erscheinungsland	England
Dokumenttyp	Journal Article
ISSN	1752-6116
ISSN (online)	1752-6116
DOI	10.1080/14763141.2022.2164345
Datenquelle	MEDical Literature Analysis and Retrieval System OnLINE

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