- document
-
Noteboom, L. (author), Nijs, Anouk (author), Beek, Peter J. (author), van der Helm, F.C.T. (author), Hoozemans, Marco J.M. (author)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 of specific muscle groups, was developed in collaboration with the fitness company Gymstory. The aim of the...journal article 2023
- document
-
Geelen, J.E. (author), van der Helm, F.C.T. (author), Schouten, A.C. (author), Mugge, W. (author)Human hands are complex biomechanical systems that allow for dexterous tasks with many degrees of freedom. Coordination of the fingers is essential for many activities of daily living and involves integrating sensory signals. During this sensory integration, the central nervous system deals with the uncertainty of sensory signals. When...journal article 2023
- document
-
Vercruyssen, Tim G.A. (author), Henrion, Sebastian (author), Müller, Ulrike K. (author), van Leeuwen, Johan L. (author), van der Helm, F.C.T. (author)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 based on undulating fins, we built two robots with one and two fins, respectively, and conducted a...journal article 2023
- document
-
Rodriguez Hernandez, K.E. (author), de Groot, J.H. (author), Baas, Frank (author), Stijntjes, M. (author), Grootendorst, E.R.M. (author), Schiemanck, S.K. (author), van der Helm, F.C.T. (author), van der Kooij, H. (author), Mugge, W. (author)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, walking aids such as ankle-foot orthoses and orthopaedic shoes are prescribed. However, these walking aids...journal article 2023
- document
-
van Trigt, B. (author), van Hogerwou, Thomas (author), Leenen, A.J.R. (author), Hoozemans, Marco J.M. (author), van der Helm, F.C.T. (author), Veeger, H.E.J. (author)In baseball pitchers the elbow is exposed to high and repetitive loads (i.e. external valgus torque), caused by pitching a high number of balls in a practice session or game. This can result in overuse injuries like the ulnar collateral ligament (UCL) injury. To understand injury mechanisms, the effect of repetitive pitching on the elbow load...journal article 2023
- document
-
Waterval, N.F.J. (author), Claassen, C.M. (author), van der Helm, F.C.T. (author), van der Kruk, E. (author)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 in the future is necessary to timely intervene in order to prevent falls. Therefore, the aim of this...review 2023
- document
-
van Trigt, B. (author), Bouman, F.F. (author), Leenen, Antonius J. R. (author), Hoozemans, Marco J.M. (author), van der Helm, F.C.T. (author), Veeger, H.E.J. (author)Medial elbow overuse injuries are rising in baseball. The external valgus torque magnitude is a possible risk factor for medial elbow injuries. The magnitude on its own cannot explain why one pitcher sustains an injury and another does not. Therefore, the aim of this study is to describe the within-individual external valgus torque variability...journal article 2022
- document
-
Bittner, M. (author), Yang, W. (author), Zhang, X. (author), Seth, A. (author), van Gemert, J.C. (author), van der Helm, F.C.T. (author)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-coupled steps to estimate the kinematics of a person from videos. Most current techniques work in a multi-step...journal article 2022
- document
-
van den Berg, Boudewijn (author), Manoochehri, M. (author), Schouten, A.C. (author), van der Helm, F.C.T. (author), Buitenweg, Jan R. (author)Recent studies have established the presence of nociceptive steady-state evoked potentials (SSEPs), generated in response to thermal or intra-epidermal electric stimuli. This study explores cortical sources and generation mechanisms of nociceptive SSEPs in response to intra-epidermal electric stimuli. Our method was to stimulate healthy...journal article 2022
- document
-
van der Cruijsen, J. (author), Dooren, R.F. (author), Schouten, A.C. (author), Oostendorp, Thom F. (author), Frens, Maarten A. (author), Ribbers, G.M. (author), van der Helm, F.C.T. (author), Kwakkel, Gert (author), Selles, R.W. (author)Transcranial direct current stimulation (tDCS) is a promising tool to improve and speed up motor rehabilitation after stroke, but inconsistent clinical effects refrain tDCS from clinical implementation. Therefore, this study aimed to assess the need for individualized tDCS configurations in stroke, considering interindividual variability in...journal article 2022
- document
-
Noteboom, L. (author), Hoozemans, Marco J.M. (author), Veeger, H.E.J. (author), van der Helm, F.C.T. (author)Muscle force analysis can be essential for injury risk estimation and performance enhancement in sports like strength training. However, current methods to record muscle forces including electromyography or marker-based measurements combined with a musculoskeletal model are time-consuming and restrict the athlete's natural movement due to...journal article 2022
- document
-
Kamstra, Haye (author), Wilmes, Erik (author), van der Helm, F.C.T. (author)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 soft tissue artefact (STA) and the orientation filter. Methods to minimize these errors are currently...journal article 2022
- document
-
Wilmes, Erik (author), DE Ruiter, Cornelis J. (author), Bastiaansen, Bram J.C. (author), Goedhart, Edwin A. (author), Brink, Michel S. (author), van der Helm, F.C.T. (author), Savelsbergh, Geert J.P. (author)PURPOSE: Neuromuscular fatigue is considered to be important in the etiology of hamstring strain injuries in football. Fatigue is assumed to lead to decreases in hamstring contractile strength and changes in sprinting kinematics, which would increase hamstring strain injury risk. Therefore, the aim was to examine the effects of football...journal article 2021
- document
-
van Trigt, B. (author), Galjee, E.N. (author), Hoozemans, Marco J.M. (author), van der Helm, F.C.T. (author), Veeger, H.E.J. (author)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 (MER). In-vitro studies show that external valgus torque is resisted by the ulnar collateral ligament but...journal article 2021
- document
-
van Kordelaar, J. (author), van de Ruit, M.L. (author), Solis Escalante, T. (author), Aerden, Leo A.M. (author), Meskers, Carel G.M. (author), van Wegen, Erwin E.H. (author), Schouten, A.C. (author), Kwakkel, Gert (author), van der Helm, F.C.T. (author)Background: Proprioception is important for regaining motor function in the paretic upper extremity after stroke. However, clinical assessments of proprioception are subjective and require verbal responses from the patient to applied proprioceptive stimuli. Cortical responses evoked by robotic wrist perturbations and measured by...journal article 2021
- document
-
van den Berg, Boudewijn (author), Manoochehri, M. (author), Kasting, Mindy (author), Schouten, A.C. (author), van der Helm, F.C.T. (author), Buitenweg, Jan R. (author)A sustained sensory stimulus with a periodic variation of intensity creates an electrophysiological brain response at associated frequencies, referred to as the steady-state evoked potential (SSEP). The SSEPs elicited by the periodic stimulation of nociceptors in the skin may represent activity of a brain network that is primarily involved in...journal article 2021
- document
-
Geelen, J.E. (author), Branco, Mariana P. (author), Ramsey, Nick F. (author), van der Helm, F.C.T. (author), Mugge, W. (author), Schouten, A.C. (author)Motion capture systems are extensively used to track human movement to study healthy and pathological movements, allowing for objective diagnosis and effective therapy of conditions that affect our motor system. Current motion capture systems typically require marker placements which is cumbersome and can lead to contrived movements.Here, we...conference paper 2021
- document
-
van Trigt, B. (author), Leenen, A.J.R. (author), Hoozemans, Marco J.M. (author), van der Helm, F.C.T. (author), Veeger, H.E.J. (author)Upper extremity injuries are common in baseball. One of these is the ulnar collateral ligament (UCL) injury. In the field of sports injuries, most research focuses on average kinematics and kinetics between subjects, whereas focusing on within-subject variability appears to be more relevant for determining injury risk. We constructed a simple...journal article 2020
- document
-
Yang, Y. (author), Yao, Jun (author), Dewald, Julius (author), van der Helm, F.C.T. (author), Schouten, A.C. (author)This paper introduces the Cross-frequency Amplitude Transfer Function (CATF), a model-free method for quantifying nonlinear stimulus-response interaction based on phase-locked amplitude relationship. The CATF estimates the amplitude transfer from input frequencies at stimulation signal to their harmonics/intermodulation at the response signal....journal article 2020
- document
-
Lemus Perez, D.S. (author), Berry, Andrew (author), Jabeen, S. (author), Jayaraman, Chandrasekaran (author), Hohl, Kristen (author), van der Helm, F.C.T. (author), Jayaraman, Arun (author), Vallery, H. (author)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 yet been evaluated with humans. Here we use the GyBAR, a backpack-like prototype portable robot, to...journal article 2020