Han Houdijk

Han Houdijk
University Medical Center Groningen · Center for Human Movement Sciences

PhD

About

186
Publications
48,064
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
4,359
Citations
Citations since 2017
66 Research Items
2702 Citations
20172018201920202021202220230100200300400500
20172018201920202021202220230100200300400500
20172018201920202021202220230100200300400500
20172018201920202021202220230100200300400500
Additional affiliations
May 2020 - August 2020
University of Groningen
Position
  • Professor (Full)
Description
  • chair in clinical movement sciences
May 2003 - April 2020
Heliomare Rehabilitation Centre
Position
  • Head of Department
January 2001 - December 2015
Vrije Universiteit Amsterdam
Position
  • Professor (Assistant)

Publications

Publications (186)
Article
Full-text available
Objective Individuals after stroke are less active, experience more fatigue, and perform activities at a slower pace than peers with no impairments. These problems might be caused by an increased aerobic energy expenditure during daily tasks and a decreased aerobic capacity after stroke. The aim of this study was to quantify relative aerobic load (...
Article
Full-text available
Surgeons are at high risk for developing musculoskeletal symptoms (MSS), like neck and back pain. Quantitative analysis of 3D neck and trunk movements during surgery can help to develop preventive devices such as exoskeletons. Inertial Measurement Units (IMU) and markerless motion capture methods are allowed in the operating room (OR) and are a goo...
Article
Background: The interpretation of clinical gait data in children with cerebral palsy (CP) is time-consuming, requires extensive expertise and often lacks transparency. Here we aimed to develop a set of look-up tables to support this process, linking typical gait features as present in CP to their potential underlying impairments. Methods: We dev...
Article
Background: Lower-limb amputations are rare but debilitating events in the lives of affected persons. Treatment of persons with amputation inherently involves many different health care professions at different stages leading to and after an amputation. There are prevailing clinical questions within the work field related to different facets of ca...
Article
Full-text available
This study aims to evaluate whether a test protocol with standardized and individualized resistance settings leads to valid wheelchair Wingate tests (WAnT) and graded exercise tests (GXT) in healthy novices. Twenty able-bodied individuals (10M/10F, age 23 ± 2 years, body mass 72 ± 11 kg) performed an isometric strength test, sprint test, WAnT and G...
Article
Full-text available
Purpose: Motor learning interventions for children with cerebral palsy (CP) that elicit relatively permanent and transferable improvements in motor skill capability are essential. Knowledge is needed about the augmented feedback forms that most effectively promote this. This review aims to collect and analyze the current evidence for the effective...
Chapter
Exoskeletons often allow limited movement of the ankle joint. This could increase the chance of falling while walking, particularly on challenging surfaces, such as lateral inclines. In this study, the effect of a mobility limiting ankle brace on gait stability in the frontal plane was assessed, while participants walked on lateral inclines. The br...
Book
Han Houdijk is hoogleraar Klinische Bewegingswetenschappen. Tijdens zijn inaugurele rede gaat Houdijk in op hoe de bewegingswetenschappen theorieën en modellen - uit onder andere de biomechanica, inspanningsfysiologie en motorisch leren - gebruiken om het normale en gestoorde bewegen te begrijpen en hoe daar innovatieve klinische behandelstrategieë...
Article
Full-text available
Stretching is applied to lengthen shortened muscles in pathological conditions such as joint contractures. We investigated (i) the acute effects of different types of stretching, i.e. constant length (CL) and constant force (CF) stretching, on changes in passive mechanical and morphological properties of medial gastrocnemius muscle (MG) and (ii) th...
Article
Full-text available
Previous studies on handrim wheelchair-specific (an)aerobic exercise capacity in wheelchair athletes have used a diversity of participants, equipment and protocols. Therefore, test results are difficult to compare among studies. The first aim of this scoping review is to provide an overview of the populations studied, the equipment and protocols us...
Preprint
Full-text available
Previous studies have estimated the energy cost required for the control of medio-lateral stability in human walking by means of external lateral stabilization. Results were inconsistent, possibly due to differences in task constraints or stabilization devices. To better understand the effects of lateral stabilization on energy cost, we conducted a...
Article
Background: Maintaining a healthy lifestyle is important for wheelchair users’ well-being, as it can have a major impact on their daily functioning. Mobile health (mHealth) apps can support a healthy lifestyle; however, these apps are not necessarily suitable for wheelchair users with spinal cord injury or lower limb amputation. Therefore, a new mH...
Article
Full-text available
Background: Energy cost of walking (ECw) is an important determinant of walking ability in people with a lower-limb amputation. Large variety in estimates of ECw has been reported, likely because of the heterogeneity of this population in terms of level and cause of amputation and walking speed. Objectives: To assess (1) differences in ECw betwe...
Article
Background Many studies on ankle-foot orthoses investigated the optimal stiffness around the ankle, while the effect of footplate stiffness has been largely ignored. This study investigated the effects of ankle-foot orthosis footplate stiffness on ankle-foot push-off power during walking in able-bodied persons. Methods Twelve healthy participants...
Article
Full-text available
Background Individuals post-stroke walk slower than their able-bodied peers, which limits participation. This might be attributed to neurological impairments, but could also be caused by a mismatch between aerobic capacity and aerobic load of walking leading to an unsustainable relative aerobic load at most economic speed and preference for a lower...
Poster
Full-text available
Researchers have estimated the energy cost required for the control medio-lateral stability of human walking using external lateral stabilization. Results were inconsistent, possibly due to differences in study design or experimental setups. To better understand the effects of lateral stabilization on energy cost, we conducted a quantitative meta-a...
Article
Assessment of metabolic energy expenditure from indirect calorimetry is currently limited to sustained (>4 min) cyclic activities, because of steady-state requirements. This is problematic for patient populations who are unable to perform such sustained activities. Therefore, this study explores validity and reliability of a method estimating metab...
Preprint
Full-text available
Background: Individuals post-stroke walk slower than their able-bodied peers, which limits participation. This might be attributed to neurological impairments, but could also be caused by a mismatch between aerobic capacity and aerobic load of walking. Research question: What is the potential impact of aerobic capacity and aerobic load of walking o...
Article
Full-text available
Background: The effect of external lateral stabilization on medio-lateral gait stability has been investigated previously. However, existing lateral stabilization devices not only constrain lateral motions but also transverse and frontal pelvis rotations. This study aimed to investigate the effect of external lateral stabilization with and without...
Article
Full-text available
Purpose Low back pain (LBP) remains a major worldwide healthcare issue. Recently, spinal exoskeletons were proposed as a potentially useful solution for LBP prevention and vocational reintegration for people who perform heavy load lifting, repetitive movements or work in prolonged static postures. The purpose of this study was to investigate how pa...
Article
Full-text available
Purpose Determinants of successfully introducing passive exoskeletons in the working environment to decrease mechanical loading on the back, are acceptability of the device to management and employees, including self-efficacy of employees when using the device. Therefore, the aim of this study was to assess self-efficacy of employees with low-back...
Article
Full-text available
Objective The energy cost of walking with a lower limb prosthesis is higher compared to able-bodied walking, and depends on both cause and level of amputation. This increase might partly be related to problems with balance control. In this study we investigated to what extend energy cost can be reduced by providing support through a handrail or can...
Article
Full-text available
Objective: To safely and effectively train the exercise capacity of post-COVID-19 patients it is important to test for cardiopulmonary risk factors and to assess exercise limitations. The goal of this study was to describe the exercise capacity and underlying exercise limitations of mechanically ventilated post-COVID-19 patients in clinical rehabi...
Preprint
BACKGROUND Maintaining a healthy lifestyle is important for wheelchair users’ wellbeing, as it can have a major impact on their daily functioning. Mobile health (mHealth) applications can support a healthy lifestyle, however, are not suitable for wheelchair users with spinal cord injury or lower limb amputation. Therefore, a new mHealth application...
Article
Purpose: This study evaluated intraobserver reliability and construct validity of the squat test to assess lower extremity strength in children with cerebral palsy (CP) and spastic diplegia. Methods: Children with CP performed 2 trials of the squat test and calculated the intraclass correlation coefficient to evaluate intraobserver reliability....
Conference Paper
Background: Energy cost of walking (ECw) is an important determinant of walking ability and participation of people after lower limb amputation [1]. It has frequently been found that people after lower limb amputation have increased ECw compared to able-bodied individuals [2,3]. However, large variety in estimates of ECw are reported in literature,...
Article
Full-text available
Background Human movement, rehabilitation, and allied sciences have embraced their ambitions within the cycle of “RehabMove” congresses over the past 30 years. This combination of disciplines and collaborations in the Netherlands has tried to provide answers to questions in the fields of rehabilitation and adapted sports, while simultaneously gener...
Article
Recently, several spinal exoskeletons were developed with the aim to assist occupational tasks such as load-handling and work in prolonged static postures. While the biomechanical effects of such devices has been well investigated, only limited feedback to the developers is usually provided regarding the subjective perceptions of the end-users. The...
Preprint
Full-text available
Background The effect of external lateral stabilization on medio-lateral gait stability has been investigated previously. However, existing lateral stabilization devices not only constrains lateral motions, but also transverse and frontal pelvis rotations. This study aimed to investigate the effect of external lateral stabilization with and without...
Article
Full-text available
The aim of this study was to assess functional performance and user satisfaction of workers with and without a history of low-back pain when wearing a passive trunk exoskeleton (SPEXOR). 24 male participants, including 18 workers from load-handling professions, participated in this study. We allocated 13 to a low back pain group and 11 to a healthy...
Article
Full-text available
Purpose Besides mechanical loading of the back, physiological strain is an important risk factor for low back pain. Recently a passive exoskeleton (SPEXOR) has been developed to reduce loading on the low back. We aimed to assess the effect of this device on metabolic cost of repetitive lifting. To explain potential effects, we assessed kinematics,...
Article
Full-text available
Objective The objective of this study was to identify criteria to be considered when developing an exoskeleton for low-back pain patients by exploring the perceptions and expectations of potential end users. Background Psychosocial, psychological, physical load, and personality influence incidence of low-back pain. Body-worn assistive devices that...
Article
Full-text available
Running-specific prostheses (RSP) are designed to replicate the spring-like behavior of the biological leg in people with a lower limb amputation. Running performance strongly depends on stiffness of the RSP. The aim of this study was to investigate the effects of angle of alignment of the RSP on its stiffness, and how this affects total leg stiffn...
Article
Background: It is questionable whether postures that are regarded as sedentary behavior in able-bodied persons evoke comparable physiological responses in adults with stroke or cerebral palsy (CP). This study aimed to compare metabolic demand and muscle activity in healthy controls, adults with stroke, and adults with CP during sedentary behavior...
Article
Background: Sufficient cardiorespiratory fitness has been regarded a prerequisite for prosthetic walking. In order to improve cardiorespiratory fitness, adequate strain ought to be placed on the system during training. Objectives: To determine cardiorespiratory fitness at the start and end of inpatient rehabilitation after lower limb amputation...
Article
Full-text available
Normal arm swing plays a role in decreasing the cost of transport during walking. However, whether excessive arm swing can reduce the cost of transport even further is unknown. Therefore, we tested the effects of normal and exaggerated arm swing on the cost of transport in the current study. Healthy participants (n=12) walked on a treadmill (1.25 m...
Article
Full-text available
The list of authors and some of the authors' affiliations were incorrect in the original publication. The correct author list and authors' affiliations are shown here.
Article
Study design: Cross-sectional study. Objectives: To describe experienced sitting-related health and stability problems among persons with paraplegia (PP) or tetraplegia (TP) and to investigate associations with personal, lesion and wheelchair characteristics as well as satisfaction with sitting posture. Setting: Dutch community. Methods: A s...
Article
The objective of this study was to assess how wearing a passive trunk exoskeleton affects metabolic costs, movement strategy, and muscle activation during repetitive lifting and walking. We measured energy expenditure, kinematics, and muscle activity in 11 healthy men during 5 minutes of repetitive lifting and 5 minutes of walking with and without...
Article
Full-text available
The objective of SPEXOR project is to address low back pain as one of the most appealing health problems of the modern society by creating a body of scientific and technological knowledge in the multidisciplinary areas of biomechanics, robotics, and computer science that will lead to technologies for low back pain prevention. In this paper we provi...
Chapter
Full-text available
The objective of this study was to assess the effect of a passive trunk exoskeleton on functional performance and metabolic costs in healthy individuals. Functional performance of 12 work-related tasks was assessed based on objective outcome measures and perceived task difficulty. In addition, we measured energy expenditure during 5 min of repetiti...
Article
Accessible by the following link (up to the 12th of January 2019): https://authors.elsevier.com/a/1Y6H43RoQ8Qqo2 Abstract: Background: Prosthetic alignment is used to optimize prosthetic functioning and comfort. Spatio-temporal and kinematic gait parameters are generally observed to guide this process. However, they have been shown to be influen...
Preprint
Full-text available
Normal arm swing plays a role in decreasing the cost of transport during walking. However, whether excessive arm swing can reduce the cost of transport even further is unknown. Therefore, we tested the effects of normal and exaggerated arm swing on the cost of transport in the current study. Healthy participants ( n =12) walked on a treadmill (1.25...
Article
Full-text available
Background: Energy storing and return (ESAR) feet are generally preferred over solid ankle cushioned heel (SACH) feet by people with a lower limb amputation. While ESAR feet have been shown to have only limited effect on gait economy, other functional benefits should account for this preference. A simple biomechanical model suggests that enhanced...
Article
Full-text available
Objective: This study aimed to assess if external focus instructions result in greater improvements in motor skill and automaticity compared to internal focus instructions in stroke patients. Design: Double-blind randomized controlled trial. Setting: Inpatient stroke rehabilitation unit. Subjects: A total of 63 stroke patients (Meanage = 59.6 ± 10....
Article
Full-text available
Aim To investigate whether more prominent signs of muscle fatigue occur during self‐paced walking in children with cerebral palsy (CP) compared to typically developing peers. Method In this case–control study, 13 children with CP (four males, nine females; mean age [SD] 11y 4mo [3y 8mo]; nine in Gross Motor Function Classification System [GMFCS] l...
Article
Full-text available
The objective of this study was to assess the effect of a passive trunk exoskeleton on functional performance for various work related tasks in healthy individuals. 18 healthy men performed 12 tasks. Functional performance in each task was assessed based on objective outcome measures and subjectively in terms of perceived task difficulty, local an...
Article
Background: Many stroke patients are inclined to consciously control their movements. This is thought to negatively affect patients' motor performance, as it disrupts movement automaticity. However, it has also been argued that conscious control may sometimes benefit motor performance, depending on the task or patientś motor or cognitive capacity....
Chapter
Most assistive robotic devices are exoskeletons which assist or augment the motion of the limbs and neglect the role of the spinal column in transferring load from the upper body and arms to the legs. In the SPEXOR project we will fill this gap and design a novel spinal exoskeleton to prevent low-back pain in able bodied workers and to support work...
Chapter
Most assistive robotic devices are exoskeletons which assist or augment the motion of the limbs and neglect the role of the spinal column in transferring load from the upper body and arms to the legs. In this part of the SPEXOR project we will fill this gap and design a novel, passive spinal exoskeleton to prevent low-back pain in able bodied worke...
Article
Full-text available
Purpose: People without neurological impairments show superior motor learning when they focus on movement effects (external focus) rather than on movement execution itself (internal focus). Despite its potential for neurorehabilitation, it remains unclear to what extent external focus strategies are currently incorporated in rehabilitation post-str...
Article
Active lifestyle and physical exercise are considered crucial to people with a disability both for fruitful functioning and participation in society as for long-term health reasons. Restoration of mobility is important for an active lifestyle. Rehabilitation professionals and fitness trainers should play a role in assisting people with a disability...
Article
Background: Knowledge on lower extremity strength is imperative to informed decision making for children with cerebral palsy (CP) with mobility problems. However, a functional and clinically feasible test is not available. We aimed to determine whether the squat test is suitable for this purpose by investigating test performance and execution in c...
Article
Full-text available
Many stroke patients experience difficulty with performing dual-tasks. A promising intervention to target this issue is implicit motor learning, as it should enhance patients' automaticity of movement. Yet, although it is often thought that implicit motor learning is preserved post-stroke, evidence for this claim has not been systematically analyse...
Data
Funnel Plot of Included Studies. Studies were pooled for the main outcome (“Can patients with stroke learn motor tasks implicitly?”). For each study, its effect estimate (standard mean difference of performance in random versus repeated block; SMD) is plotted against its precision (standard error of the SMD; SE). The resulting symmetrical distribut...
Data
Search Strategy. Example of the search strategy for Medline. (DOCX)
Data
Study Characteristics. (PDF)
Data
Appendices A-C with Modified Newcastle Ottawa Scales. The three different Newcastle Ottawa Scales used to assess studies’ risk of bias for each of the three research questions. Of note, for each NOS-scale the items on performance bias rated studies’ quality on their success of blinding participants (i.e., the amount of explicit knowledge that parti...
Article
Full-text available
Background: After stroke, many patients undergo intensive rehabilitation therapy to re-acquire motor skills like walking or grasping. Observational studies suggest that therapists pre- dominantly rely on so-called explicit motor learning strategies during this rehabilitation period. Explicit motor learning may not be the optimal learning strategy f...