Abstract Background: In a changing European agricultural context, diversification of dairy farms is gaining attention. This study seeks to (1) assess musculoskeletal pain prevalence associated with tasks such as butter, yogurt, and cheese production; and (2) analyze associated risks. Methods: Observing 31, mostly female, workers, we utilized the ERGOROM questionnaire, a methodology adapted from ...

When a Hamiltonian system undergoes a stochastic, time-dependent anharmonic perturbation, the values of its adiabatic invariants as a function of time follow a distribution whose shape obeys a Fokker–Planck equation. The effective dynamics of the body’s centre-of-mass during human walking is expected to represent such a stochastically perturbed dynamical system. By studying, in phase space, the ...

Background: Side-stepping is a potential exercise program to reduce fall risk in community-dwelling adults in their seventies, but it has never been tested in nursing home residents. This was a pilot quasi-experimental study to examine the feasibility and potential mobility and balance benefits of an intervention based on voluntary non-targeted side-stepping exercises in nursing home residents ...

wo previous studies showed kinematic differences between novice and experienced performers during unchoreographed movements executed in standing position. However, no study explores if these kinematic differences holds during unchoreographed movements executed in quadrupedal position. The aim of this study is to compare the movement behaviour of experienced and novice performers during an exercise ...

Recent advances in electronics have led to sensors whose sizes and weights are such that they can be placed on living systems without impairing their natural motion and habits. They may be worn on the body as accessories or as part of the clothing and enable personalized mobile information processing. Wearable sensors open the way for a nonintrusive and continuous monitoring of body orientation, ...

Editorial de la Special Issue de Sensors, Wearable Sensors Applied in Movement Analysis.

Human walking exhibits properties of both stability and variability. On the one hand, the variability of the interval of time between heel strikes is autocorrelated, i.e., not randomly organized. On the other hand, walking is highly stereotyped and arguments from general mechanics suggest that the stability of gait can be assessed according to invariant properties. This study aims at proposing ...

Nowadays, the better assessment of low back pain (LBP) is an important challenge, as it is the leading musculoskeletal condition worldwide in terms of years of disability. The objective of this study was to evaluate the relevance of various machine learning (ML) algorithms and Sample Entropy (SampEn), which assesses the complexity of motion variability in identifying the condition of low back pain. ...

Understanding neck pain is an important societal issue. Kinematic data from sensors may help to gain insight into the pathophysiological mechanisms associated with neck pain through a quantitative sensorimotor assessment of one patient. The objective of this study was to evaluate the potential usefulness of artificial intelligence with several machine learning (ML) algorithms in assessing neck ...

The aim of this study was to carry out a kinematic analysis of the lower limb during gait in subjects with asymptomatic genu recurvatum. The sagittal plane kinematics of the lower limb during gait in a group of 13 subjects with genu recurvatum was shown to be significantly different to that of a group of 13 control healthy subjects. An increase in extension and a decrease in flexion of the hip ...

Introduction: The variability of human walking has been studied for about twenty years. It appears not to be random but long-term autocorrelated, i.e. on time scales corresponding to several hundreds of gait cycles. It has been shown that the central nervous system (CNS) plays an important role in this variability. Indeed, people with CNS alterations have a different autocorrelation pattern than ...

Adolescent recreational dancers mostly use static hamstring stretching. However, dynamic stretching seems to influence athletic performance as well. Is one of these stretching methods more favorable to the execution of a grand battement or d velopp  (two ballet movements) in dancers? Sixteen participants performed a grand battement and a d velopp  under three conditions: without stretching, ...

The Timed Up and Go test (TUG) is commonly used to estimate the fall risk in the elderly. Several ways to improve the predictive accuracy of TUG (cameras, multiple sensors, other clinical tests) have already been proposed. Here, we added a single wearable inertial measurement unit (IMU) to capture the residents’ body center-of-mass kinematics in view of improving TUG’s predictive accuracy. The aim ...

Understanding neck pain is an important societal issue. Kinematic data from sensors may help to gain insight into the pathophysiological mechanisms associated with neck pain through a quantitative sensorimotor assessment of one patient. The objective of this study was to evaluate the potential usefulness of artificial intelligence with several machine learning (ML) algorithms in assessing neck ...

Background: COVID-19 has affected the practice of physiotherapy, and telerehabilitation (TR) may be seen as an alternative model of care if it is accepted by patients and physiotherapists. This study investigates the perceived usefulness of TR and the intention to use it among physiotherapists and patients from Belgium and France concerned with musculoskeletal disorders (MSDs) during the pandemic ...

Comme tous les systèmes dynamiques, l’Homme est soumis aux lois de la mécanique. Il n’est toutefois pas réductible à une machine comme les autres : il est biologique, psychologique et social ! La douleur, définie comme une expérience sensorielle et émotionnelle désagréable associée à une lésion tissulaire réelle ou non, est une composante de nature complexe. Elle se manifeste notamment dans les ...

Présentation donnée au congrès NOMADe-SOFMER (Lille, 16/10/21)

The role of gravity in human motor control is at the same time obvious and difficult to isolate. It can be assessed by performing experiments in variable gravity. We propose that adiabatic invariant theory may be used to reveal nearly conserved quantities in human voluntary rhythmic motion, an individual being seen as a complex time-dependent dynamical system with bounded motion in phase space. ...

Before and immediately after passive upper limb neurodynamic mobilizations targeting the median nerve, grip ( GF ) and load ( LF ) forces applied by the thumb, index and major fingers (three-jaw chuck pinch) were collected using a manipulandum during three different grip precision tasks: grip-lifthold- replace (GLHR), vertical oscillations (OSC), and vertical oscillations with up and down ...

This book is a printed edition of the Special Issue Low-Cost Sensors and Biological Signals that was published in Sensors

The objective of this studywas to explore the effects of static and dynamic hamstring muscles stretching on kinematics and esthetics of grand battement (high velocity kicks) in adolescent recreational dancers. Sixteen participants were assessed before and immediately after both stretching modalities. Kinematics of movement was measured by an optoelectronic system and esthetics was scored by a ...

Diaporama de la présentation orale donnée au congrès Genees & Kunst 2021 , organisé par la Nederlandse Vereniging voor Dans- en Muziekgeneeskunde.

Background:Kinematic characteristics of walking with an asymptomatic genu recurvatum are currently unknown. The objective of this study is to characterize the lower limb sagittal joint and elevation angles during walking in participants with asymptomatic genu recurvatum and compare it with control participants without knee deformation at different speeds.Methods:The spatio-temporal parameters and ...

Editorial of the Special issue Low-Cost sensors and Biological signals https://www.mdpi.com/journal/sensors/special_issues/LCSBS

Background: COVID-19 has affected the practice of physiotherapy, and telerehabilitation (TR) may be seen as an alternative model of care if it is accepted by patients and physiotherapists. This study investigates the perceived usefulness of TR and the intention to use it among physiotherapists and patients from Belgium and France concerned with musculoskeletal disorders (MSDs) during the pandemic ...

Le projet INTERREG FWVL NOMADe (NeurOMuskuloske letAl Disorders – e-learning ecosystem), dont le CeREF est chef de file, vise à développer et coordonner un écosystème d’apprentissage, R&D et expertise spécialisé dans le domaine des troubles neuro-musculo-squelettiques. Ce projet, financé sur une durée de trois ans, est actuellement dans sa deuxième année. Après une brève présentation de NOMADe, deux ...

Indices characterising the long-range temporal structure of walking stride interval (SI) variability such as Hurst exponent (H) and fractal dimension (D) may be used in addition to indices measuring the amount of variability like the coefficient of variation (CV). We assess the added value of the former indices in a clinical neurological context. Our aim is to demonstrate that they provide a clinical ...

Les jeunes danseurs amateurs semblent utiliser majoritairement l’étirement statique. Or, la littérature montre également l’efficacité de l’étirement dynamique sur la performance des sportifs. L’un de ces étirements est-il dès lors plus favorable à l’exécution de deux mouvements de danse classique, le grand battement et développé ? Seize participants ont réalisé ces mouvements dans trois conditions ...

Où le projet INTERREG FWVL NOMADe (NeurOMuskuloskeletAl Disorders – e-learning ecosystem) est présenté, ainsi que deux réalisations illustrant la première année de son déroulement

Voluntary human movements are stereotyped. When modeled in the framework of classical mechanics they are expected to minimize cost functions that may include energy, a natural candidate from a physiological point of view also. In time-changing environments, however, energy is no longer conserved—regardless of frictional energy dissipation—and it is therefore not the preferred candidate for any cost ...

Présentation de projet Interreg FWVl NOMADe

Assessing the risk of fall in elderly people is a difficult challenge for clinicians. Since falls represent one of the first causes of death in such people, numerous clinical tests have been created and validated over the past 30 years to ascertain the risk of falls. More recently, the developments of low-cost motion capture sensors have facilitated observations of gait differences between fallers ...

Digital natives developed in an electronic dual tasking world. This paper addresses two questions. Do digital natives respond differently under a cognitive load realized during a locomotor task in a dual-tasking paradigm and how does this address the concept of safety? We investigate the interplay between cognitive (talking and solving Raven’s matrices) and locomotor (walking on a treadmill) tasks ...

En cette période de confinement liée au coronavirus 2 du syndrome respiratoire aigu sévère (SRAS-CoV-2), l’objectif de cet article est de formuler une opinion sur l'efficacité de la prise en charge kinésithérapique des troubles neuro-musculo-squelettiques (TNMS) par téléréadaptation (TR) ainsi que des guidelines pour les kinésithérapeutes. L’efficacité de la prise en charge en kinésithérapie par TR ...

Various noninvasive measurement devices can be used to assess cervical motion. The size, complexity, and cost of gold-standard systems make them not suited to clinical practice, and actually difficult to use outside a dedicated laboratory. Nowadays, ultra-low-cost inertial measurement units are available, but without any packaging or a user-friendly interface. The so-called DYSKIMOT is a home-designed, ...

L’évaluation du risque de chute chez les personnes âgées est un véritable défi pour les thérapeutes, les chutes constituant en effet une des premières causes de mortalité chez cette population. De nombreux tests cliniques ont été développés et validés durant les 30 dernières années. Plus récemment, l’émergence de capteurs de mouvement à faible coût facilite l’observation des différences cinématiques ...

Sensorimotor control strategies during cervical axial rotation movements have been previously explored in narrow age ranges but never concurrently in Children and Seniors during a well-standardized task. However, the lifespan developmental approach provides a framework for research in human sensorimotor control of the head-neck complex. A cross-sectional design was used to investigate the influence ...

he status of classical stability in higher-deriv- ative systems is still subject to discussions. In this note, we argue that, contrary to general belief, many higher-derivative systems are classically stable. The main tool to see this prop- erty are Nekhoroshev’s estimates relying on the action-angle formulation of classical mechanics. The latter formulation can be reached provided the Hamiltonian ...

L’évaluation du risque de chute chez les personnes âgées est un véritable défi pour les thérapeutes, les chutes constituant en effet une des premières causes de mortalité chez cette population. De nombreux tests cliniques ont été développés et validés durant les 30 dernières années. Plus récemment, l’émergence de capteurs de mouvement à faible coût facilite l’observation des différences cinématiques ...

Le but de cette étude est de réaliser une analyse de la cinématique du membre inférieur au cours de la marche chez des sujets présentant une déformation de type genu recurvatum afin de déterminer les caractéristiques de la marche de ces derniers. La cinématique du membre inférieur dans le plan sagittal durant la marche d’un groupe de 13 sujets présentant un genu recurvatum a révélé plusieurs différences ...

On définit d’abord le terme neuro-musculo-squelettique (NMS) comme les interactions complexes entre les systèmes squelettique, musculaire et nerveux responsables du mouvement.

Où trois enseignants-chercheurs devisent au sujet de la marche bipède chez l’humain et où la dynamique à long terme de ce phénomène est interprétée en termes de complexité et prévisibilité, deux concepts quantifiables grâce aux fractales et aux outils mathématiques permettant de les étudier.

Compte rendu de la conférence JETSAN 2017

Purpose This study evaluates the impact of a 3-week period of intensive pelvic floor muscles training (PFMT), with or without instrumentation, on clinical and static magnetic resonance imaging (MRI) changes of puborectalis (PR) and iliococcygeus (IL) muscles. Methods 24 healthy young women were enrolled in the study and 17 achieved the 9 sessions of 30 min training exercises and conducted all ...

Previous research on unstable footwear has suggested that it may induce mechanical noise during walking. The purpose of this study was to explore whether unstable footwear could be considered as a noise-based training gear to exercise body center of mass (CoM) motion during walking. Ground reaction forces were collected among 24 healthy young women walking at speeds between 3 and 6 km h−1 with ...

En septembre 2017, le laboratoire Forme et Fonctionnement Humain (FFH) de la Haute école Louvain-en-Hainaut (HELHa) s’est installé dans de nouveaux locaux, dotés d’une superficie totale de 175 m2. Implanté dans les sous-sols du bâtiment, des fenêtres ont été percées et un éclairage LED a été mis en place afin de rendre le laboratoire plus lumineux. Un faux-sol a également été installé de manière à ...

Locomotion is a natural task that has been assessed for decades and used as a proxy to highlight impairments of various origins. So far, most studies adopted classical linear analy- ses of spatio-temporal gait parameters. Here, we use more advanced, yet not less practical, non-linear techniques to analyse gait time series of healthy subjects. We aimed at finding more sensitive indexes related to ...

Compte rendu de : "Tim White, Michael Black, Pieter Folkens, Traité d’osteologie humaine : anatomie, anthropologie, paléontologie ́/ traduction de Jean-Pol Beauthier, Philippe Lefevre ̀et Francois Beauthier – 1 vol de ̧ xxviii + 692 p. – (21 × 27,5) – broché – De Boeck supérieur – 2016 – 69,00 € – isbn 978-2-8073-0301-0"