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Towards real-time feedback in high performance speed skating

van der Eb, Jeroen (author), Zandee, Willem (author), van den Bogaard, Timo (author), Geraets, Sjoerd (author), Veeger, H.E.J. (author), Beek, Peter (author)

The aim of the current study is to evaluate several performance indicators to be used as real-time feedback in the coming experiments to enhance performance of elite speeds skaters. Six speed skaters, wearing one IMU per skate, collected data over one full training season to evaluate and pinpoint useful performance indicators. Promising...

conference paper 2017

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Timing and extent of finger force enslaving during a dynamic force task cannot be explained by EMG activity patterns

Mirakhorlo, M. (author), Maas, Huub (author), Veeger, H.E.J. (author)

Finger enslaving is defined as the inability of the fingers to move or to produce force independently. Such finger enslaving has predominantly been investigated for isometric force tasks. The aim of this study was to assess whether the extent of force enslaving is dependent on relative finger movements. Ten right-handed subjects (22–30 years)...

journal article 2017

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Focus of attention instructions during baseball pitching training

van der Graaff, Erik (author), Hoozemans, Marco (author), Pasteuning, Maurice (author), Veeger, H.E.J. (author), Beek, Peter J. (author)

It has often been shown that performance and learning in movement tasks may be improved by focusing on the effect of the movement in the environment (external focus of attention) instead of the movement itself (internal focus of attention). Nevertheless, most coaching instructions and feedback information given in sports seem to favor an...

journal article 2017

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Design and verification of a simple 3D dynamic model of speed skating which mimics observed forces and motions

van der Kruk, E. (author), Veeger, H.E.J. (author), van der Helm, F.C.T. (author), Schwab, A.L. (author)

Advice about the optimal coordination pattern for an individual speed skater, could be addressed by simulation and optimization of a biomechanical speed skating model. But before getting to this optimization approach one needs a model that can reasonably match observed behaviour. Therefore, the objective of this study is to present a verified...

journal article 2017

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Improving mobility performance in wheelchair basketball

Veeger, Thom T.J. (author), De Witte, Annemarie M.H. (author), Berger, Monique A.M. (author), van der Slikke, R.M.A. (author), Veeger, H.E.J. (author), Hoozemans, Marco J.M. (author)

Objectiev:<br/>This study aimed to investigate which characteristics of athlete, wheelchair and athlete-wheelchair interface are the best predictors of wheelchair basketball mobility performance.<br/><br/>Design:<br/>Sixty experienced wheelchair basketball players performed a wheelchair mobility performance test to assess their mobility...

journal article 2017

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Effects of offense, defense, and ball possession on mobility performance in wheelchair basketball

De Witte, Annemarie M.H. (author), Berger, Monique A.M. (author), Hoozemans, Marco J.M. (author), Veeger, H.E.J. (author), van der Woude, Lucas H.V. (author)

The aim of this study was to determine to what extent mobility performance is influenced by offensive or defensive situations and ball possession and to what extent these actions are different for the field positions. From video analysis, the relative duration of the various wheelchair movements during team offense/defense and individual ball...

journal article 2017

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Longitudinal changes in shoulder ROM and strength in association with ball-throwing speed in elite youth baseball pitchers

van Dis, F. (author), Hoozemans, M (author), van der Graaff, E (author), Veeger, H.E.J. (author)

The purpose of this prospective study was to examine the longitudinal changes in shoulder ER ROM and relative IR strength in elite youth baseball pitchers over one year and to determine their associations with changes in ball speed for throwing fastballs. One hundred and five Dutch elite youth baseball pitchers were measured three times over a...

conference paper 2016

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New methods for mobility performance measurement in wheelchair basketball

van der Slikke, R.M.A. (author), Berger, MAM (author), Bregman, DJJ (author), Veeger, H.E.J. (author)

Increased professionalism in wheelchair sports demand a more precise and quantitative measure of individual wheelchair mobility performance, to allow it to be an evaluation measure of wheelchair setting or training optimization. This research describes the application of an inertial sensor based method for measuring wheelchair kinematics and a...

conference paper 2016

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Ball velocity and elbow loading in fastball pitching

Gasparutto, X. (author), van der Graaff, E (author), Veeger, H.E.J. (author), van der Helm, F.C.T. (author)

Among baseball players, the pitchers are the most prone to injuries. These injuries occur mainly at the medial part of the elbow and at the shoulder. It is widely accepted that high joint loading are linked to overuse injury for repetitive motion. At maximal exo-rotation (MER), the elbow maximal abduction moment is predominantly counteracted by...

conference paper 2016

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The role of pelvis and thorax rotation velocity in baseball pitching

van der Graaff, E (author), Hoozemans, M (author), Nijhoff, M. (author), Davidson, M (author), Hoezen, M (author), Veeger, H.E.J. (author)

The objective of the present study was to examine the relative timing of pelvis and thorax rotations in achieving high throwing velocities in baseball pitching. During the preseason, a kinematic analysis was performed on eight pitchers. Peak angular velocities of the pelvis and thorax were determined and separation, defined as the time between...

conference paper 2016

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Getting the angles straight in speed skating: A validation study on an IMU filter design to measure the lean angle of the skate on the straights

van der Kruk, E. (author), Schwab, A.L. (author), van der Helm, F.C.T. (author), Veeger, H.E.J. (author)

To assist speed skaters in improving their skating performance, we would like to provide them with real time feedback on the orientation of the skate within a single stroke. While of course the forces generated by the skater on the ice determine the acceleration of the skater, the orientation of the skate determines in which direction this...

conference paper 2016

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Elite athlete motor and loading actions on the upper limb in baseball pitching

Gasparutto, X. (author), Van Der Graaff, E. (author), van der Helm, F.C.T. (author), Veeger, H.E.J. (author)

In baseball, pitchers are the players that are most prone to injury. Most injuries occur at the elbow and shoulder of the throwing upper limb. It is widely accepted that understanding the loading in the joints during pitching is a key factor to prevent injuries. To deepen the understanding of the joint actions this study proposes to split the...

conference paper 2016

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Push characteristics in wheelchair court sport sprinting

van der Slikke, R.M.A. (author), Berger, Monique (author), Bregman, D.J.J. (author), Veeger, H.E.J. (author)

Short sprints are important components of most wheelchair court sports, since being faster than the opponent often determines keeping ball possession or not. Sprinting capacity is best measured during a field test, allowing the athlete to freely choose push strategies adapted to their own wheelchair setting, physical ability, classification...

conference paper 2016

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From big data to rich data: The key features of athlete wheelchair mobility performance

van der Slikke, R.M.A. (author), Berger, MAM (author), Bregman, DJJ (author), Veeger, H.E.J. (author)

Quantitative assessment of an athlete׳s individual wheelchair mobility performance is one prerequisite needed to evaluate game performance, improve wheelchair settings and optimize training routines. Inertial Measurement Unit (IMU) based methods can be used to perform such quantitative assessment, providing a large number of kinematic data. The...

journal article 2016

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Giving the force direction: Analysis of speed skater push off forces with respect to an inertial coordinate system

van der Kruk, E. (author), van der Helm, F.C.T. (author), Schwab, A.L. (author), Veeger, H.E.J. (author)

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 system can give insight into what amount of the push-off force is directed into the forward motion. In this...

conference paper 2016

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Prevalence of self-reported stroke in association with ethnic background within a multi-ethnic population in Paramaribo, Suriname: Results from the helisur study

Jarbandhan, Ameerani V. (author), Hoozemans, Marco J.M. (author), Buys, Roselien (author), Diemer, Frederieke S. (author), Baldew, Se Sergio M. (author), Aartman, Jet (author), Brewster, Lizzy M. (author), Van Montfrans, Gert A. (author), Oehlers, Glenn P. (author), Veeger, H.E.J. (author), Toelsie, Jerry (author), Vanhees, Luc (author)

Background: Suriname is a middle-income country with a multi-ethnic population. Urbanization and ethnicity may be associated with incidence of cerebrovascular disease, but so far this has not been documented for Suriname. The objective of this study was to examine the prevalence of stroke in the capital of Suriname, and its association with...

journal article 2016

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Anatomical parameters for musculoskeletal modeling of the hand and wrist

Mirakhorlo, M (author), Visser, J.M.A. (author), Goislard de Monsabert, B.A.A.X. (author), van der Helm, F.C.T. (author), Maas, H. (author), Veeger, H.E.J. (author)

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 extremity parts. The aim of this study was to collect a complete anatomical data-set of the hand and wrist,...

journal article 2016

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Wireless instrumented klapskates for long-track speed skating

van der Kruk, E. (author), Den Braver (student), O. (author), Schwab, A.L. (author), van der Helm, F.C.T. (author), Veeger, H.E.J. (author)

In the current project, we aim to provide speed skaters with real-time feedback on how to improve their skating performance within an individual stroke. The elite skaters and their coaches wish for a system that determines the mechanical power per stroke. The push-off force of the skater is a crucial variable in this power determination. In...

journal article 2016

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Wheel skid correction is a prerequisite to reliably measure wheelchair sports kinematics based on inertial sensors

Van der Slikke, R.M.A. (author), Berger, M.A.M. (author), Bregman, D.J.J. (author), Veeger, H.E.J. (author)

Accurate knowledge of wheelchair kinematics during a match could be a significant factor in performance improvement in wheelchair basketball. To date, most systems for measuring wheelchair kinematics are not suitable for match applications or lack detail in key kinematic outcomes. This study describes the construction of wheel skid correction...

conference paper 2015

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Early motor learning changes in upper-limb dynamics and shoulder complex loading during handrim wheelchair propulsion

Vegter, R.J.K. (author), Hartog, J. (author), De Groot, S. (author), Lamoth, C.J. (author), Bekker, M.J. (author), Van der Scheer, J.W. (author), Van der Woude, L.H.V. (author), Veeger, H.E.J. (author)

Background To propel in an energy-efficient manner, handrim wheelchair users must learn to control the bimanually applied forces onto the rims, preserving both speed and direction of locomotion. Previous studies have found an increase in mechanical efficiency due to motor learning associated with changes in propulsion technique, but it is...

journal article 2015