F.C.T. van der Helm
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View article: What the PCSA? Addressing diversity in lower-limb musculoskeletal models: age- and sex-related differences in PCSA and muscle mass
What the PCSA? Addressing diversity in lower-limb musculoskeletal models: age- and sex-related differences in PCSA and muscle mass Open
Musculoskeletal (MSK) models offer a non-invasive way to understand biomechanical loads on joints and tendons, which are difficult to measure directly. Variations in muscle strength, especially relative differences between muscles, signifi…
View article: What the %PCSA? Addressing Diversity in Lower-Limb Musculoskeletal Models: Age- and Sex-related Differences in PCSA and Muscle Mass
What the %PCSA? Addressing Diversity in Lower-Limb Musculoskeletal Models: Age- and Sex-related Differences in PCSA and Muscle Mass Open
Musculoskeletal (MSK) models offer a non-invasive way to understand biomechanical loads on joints and tendons, which are difficult to measure directly. Variations in muscle strength, especially relative differences between muscles, signifi…
View article: Predictability of Fall Risk Assessments in Community-Dwelling Older Adults: A Scoping Review
Predictability of Fall Risk Assessments in Community-Dwelling Older Adults: A Scoping Review Open
Fall risk increases with age, and one-third of adults over 65 years old experience a fall annually. Due to the aging population, the number of falls and related medical costs will progressively increase. Correct prediction of who will fall…
View article: A Muscle Load Feedback Application for Strength Training: A Proof-of-Concept Study
A Muscle Load Feedback Application for Strength Training: A Proof-of-Concept Study Open
Muscle overload injuries in strength training might be prevented by providing personalized feedback about muscle load during a workout. In the present study, a new muscle load feedback application, which monitors and visualizes the loading…
View article: Cost of Transport of Undulating Fin Propulsion
Cost of Transport of Undulating Fin Propulsion Open
Autonomous robots are used to inspect, repair and maintain underwater assets. These tasks require energy-efficient robots, including efficient movement to extend available operational time. To examine the suitability of a propulsion system…
View article: Ankle-Foot-Orthosis “Hermes” Compensates Pathological Ankle Stiffness of Chronic Stroke—A Proof of Concept
Ankle-Foot-Orthosis “Hermes” Compensates Pathological Ankle Stiffness of Chronic Stroke—A Proof of Concept Open
Individuals with an upper motor neuron syndrome, e.g., stroke survivors, may have a pathological increase of passive ankle stiffness due to spasticity, that impairs ankle function and activities such as walking. To improve mobility, walkin…
View article: Factors associated with gym-based fitness injuries: A case-control study
Factors associated with gym-based fitness injuries: A case-control study Open
Objectives: A large number of sports injuries are sustained during gym-based fitness activities. As a first step towards prevention, the objective of the present study was to identify factors associated with fitness injuries. Design: Retro…
View article: Towards Single Camera Human 3D-Kinematics
Towards Single Camera Human 3D-Kinematics Open
Markerless estimation of 3D Kinematics has the great potential to clinically diagnose and monitor movement disorders without referrals to expensive motion capture labs; however, current approaches are limited by performing multiple de-coup…
View article: Quantification of Error Sources with Inertial Measurement Units in Sports
Quantification of Error Sources with Inertial Measurement Units in Sports Open
Background: Inertial measurement units (IMUs) offer the possibility to capture the lower body motions of players of outdoor team sports. However, various sources of error are present when using IMUs: the definition of the body frames, the …
View article: Establishing the Role of Elbow Muscles by Evaluating Muscle Activation and Co-contraction Levels at Maximal External Rotation in Fastball Pitching
Establishing the Role of Elbow Muscles by Evaluating Muscle Activation and Co-contraction Levels at Maximal External Rotation in Fastball Pitching Open
Background: Baseball pitching is associated with a high prevalence of ulnar collateral ligament injuries, potentially due to the high external valgus load on the medial side of the elbow at the instant of maximal shoulder external rotation…
View article: Controller synthesis and clinical exploration of wearable gyroscopic actuators to support human balance
Controller synthesis and clinical exploration of wearable gyroscopic actuators to support human balance Open
Gyroscopic actuators are appealing for wearable applications due to their ability to provide overground balance support without obstructing the legs. Multiple wearable robots using this actuation principle have been proposed, but none has …
View article: An Inertial Measurement Unit Based Method to Estimate Hip and Knee Joint Kinematics in Team Sport Athletes on the Field
An Inertial Measurement Unit Based Method to Estimate Hip and Knee Joint Kinematics in Team Sport Athletes on the Field Open
Current athlete monitoring practice in team sports is mainly based on positional data measured by global positioning or local positioning systems. The disadvantage of these measurement systems is that they do not register lower extremity k…
View article: An Inertial Measurement Unit Based Method to Estimate Hip and Knee Joint Kinematics in Team Sport Athletes on the Field
An Inertial Measurement Unit Based Method to Estimate Hip and Knee Joint Kinematics in Team Sport Athletes on the Field Open
Current athlete monitoring practice in team sports is mainly based on positional data measured by global positioning or local positioning systems. The disadvantage of these measurement systems is that they do not register lower extremity k…
View article: Influence of biomechanical models on joint kinematics and kinetics in baseball pitching
Influence of biomechanical models on joint kinematics and kinetics in baseball pitching Open
In baseball pitching, biomechanical parameters have been linked to ball velocity and potential injury risk. However, although the features of a biomechanical model have a significant influence on the kinematics and kinetics of a motion, th…
View article: Dynamic Information Flow Based on EEG and Diffusion MRI in Stroke: A Proof-of-Principle Study
Dynamic Information Flow Based on EEG and Diffusion MRI in Stroke: A Proof-of-Principle Study Open
In hemiparetic stroke, functional recovery of paretic limb may occur with the reorganization of neural networks in the brain. Neuroimaging techniques, such as magnetic resonance imaging (MRI), have a high spatial resolution which can be us…
View article: Comparison of Multi-Tensor Diffusion Models' Performance for White Matter Integrity Estimation in Chronic Stroke
Comparison of Multi-Tensor Diffusion Models' Performance for White Matter Integrity Estimation in Chronic Stroke Open
Better insight into white matter (WM) alterations after stroke onset could help to understand the underlying recovery mechanisms and improve future interventions. MR diffusion imaging enables to assess such changes. Our goal was to investi…
View article: EEG as an imaging tool: which inverse method can successfully disentangle sources in proximity?
EEG as an imaging tool: which inverse method can successfully disentangle sources in proximity? Open
The accuracy of EEG source localization depends on the choice of the inverse method, the resolution of the forward model, and the signal to noise ratio (SNR) of the recordings. Since we are interested in disentangling sources in proximity,…
View article: Giving the force direction : Analysis of speed skater push off forces with respect to an inertial coordinate system
Giving the force direction : Analysis of speed skater push off forces with respect to an inertial coordinate system Open
Pushoff in speed skating requires an extensive motion strategy. During speed skating the skater continuously changes the lean and steering angle of the skate and therewith the direction of push-off, The forces in an inertial coordinate sys…
View article: Admittance-Adaptive Model-Based Approach to Mitigate Biodynamic Feedthrough
Admittance-Adaptive Model-Based Approach to Mitigate Biodynamic Feedthrough Open
Biodynamic feedthrough (BDFT) refers to the feedthrough of vehicle accelerations through the human body, leading to involuntary control device inputs. BDFT impairs control performance in a large range of vehicles under various circumstance…
View article: Anatomical parameters for musculoskeletal modeling of the hand and wrist
Anatomical parameters for musculoskeletal modeling of the hand and wrist Open
A musculoskeletal model of the hand and wrist can provide valuable biomechanical and neurophysiological insights, relevant for clinicians and ergonomists. Currently, no consistent data-set exists comprising the full anatomy of these upper …