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Between gait and cognition: an exploratory mixed-methods study of cognitive—motor dual-task profiles and lived experience

2026-09-24T09:22:14Z

Between gait and cognition: an exploratory mixed-methods study of cognitive—motor dual-task profiles and lived experience Fabien, Buisseret; Frederic, Dierick; Eva, Houdart; Florence, Jonckheere; Samir, Beggache; Jennifer, Denis Background: Cognitive-motor dual tasking is widely studied. However, the results remain heterogeneous depending on the type of tasks and individual psychological factors. To address this variability, dual-task cost (DTC) frameworks allow classification of behavioral profiles. This study aimed to propose a method designed to identify individual determinants of dual-task (DT) behavior by combining quantitative gait and cognitive measures with qualitative analyses of lived experience. Methods: Thirty-three young healthy adults performed Raven’s Progressive Matrices Test (RPMT) and treadmill walking in both single-task and DT conditions. Participants were classified into DT profiles according to DTC. Statistical tests were performed to assess whether the DTCs differed from zero and whether they differed between participants who reported having answered some items randomly and those who did not. Explicitation interviews were then conducted and analyzed independently of participants’ quantitative DT profiles. Qualitative findings were subsequently integrated with the quantitative profiles at the interpretive stage to characterize individual DT behaviors. Results: Dual tasking significantly reduced RPMT response time (p < 0.001) without affecting gait parameters. All four DT profiles were represented, and explicitation interviews revealed distinct experiential strategies within each profile. Discussion: Distress and cognitive overload characterized mutual interference, analytical or automatized strategies supported cognitive-priority trade-offs, and relaxed immersion and positive affect facilitated mutual facilitation. Gait-priority participants reported bodily immersion and sensory detachment. Conclusion: Our mixed-method approach may offer a transferable methodology for clinical contexts,

Solving Raven’s Matrices While Walking on a Treadmill: Insights into Cognitive-Motor Interference Patterns in Dual-Task

2025-11-26T09:33:48Z

Solving Raven’s Matrices While Walking on a Treadmill: Insights into Cognitive-Motor Interference Patterns in Dual-Task DIERICK, Frédéric; BUISSERET, Fabien; Hoho, Thomas; Fievet, Alexandre; Luta, Adele This study investigates cognitive-motor interference by combining Raven’s Progressive Matrices Test (RPMT) with treadmill walking. Two groups of healthy adults—20 young adults (born after 1995) familiar with treadmill walking and 18 older adults (born before 1980) without treadmill experience—completed both single-task and dual-task conditions. Cognitive performance (RPMT score) and gait metrics (stride interval variability and sample entropy) were recorded. Results revealed diverse interference patterns, with a predominance of gait-prioritization strategies under dual-task conditions. Significant differences between groups were found: younger adults showed greater cognitive performance decline, while older adults increased stride interval under dual-task conditions. A negative correlation between gait variability and complexity suggested adaptive motor strategies in some participants. This dual-task paradigm offers a standardized framework to explore both individual and group variability in multitasking performance. These insights may inform the design of safer environments and interventions targeting populations with different cognitive-motor profiles.

Score Your Way to Clinical Reasoning Excellence: SCALENEo Online Serious Game in Physiotherapy Education

2025-11-26T09:33:26Z

Score Your Way to Clinical Reasoning Excellence: SCALENEo Online Serious Game in Physiotherapy Education Hage, Renaud; Dierick, Frédéric; Da Natividade, Joel; Daniau, Simon; ESTIEVENART, Wesley; Leteneur, Sébastien; SERVOTTE, Jean-Christophe; Jones, Mark; BUISSERET, Fabien SCALENEo (Smart ClinicAL rEasoning iN physiothErapy) is an innovative online serious game designed to improve clinical reasoning in musculoskeletal physiotherapy education. Adapted from the “Happy Families” card game, it provides an interactive, structured approach to developing students/learners’ ability to categorize clinical information into families of hypotheses. This digital platform supports both self-directed and collaborative learning, eliminating the need for continuous instructor supervision while ensuring meaningful engagement. SCALENEo features a unique feedback and scoring system that not only assesses students/learners’ decision-making processes but also promotes cautious and reflective reasoning over random guessing. By aligning with evidence-based pedagogical strategies, such as serious games and formative assessment, SCALENEo offers educators a powerful tool to reinforce critical thinking, improve student/learner engagement, and facilitate deeper learning in clinical reasoning education.

The Two-Thirds Power Law Derived from a Higher-Derivative Action

2025-11-26T09:33:16Z

The Two-Thirds Power Law Derived from a Higher-Derivative Action Boulanger, Nicolas; Buisseret, Fabien; Dierick, Frédéric; White, Olivier The two-thirds power law is a link between angular speed ω and curvature κ observed in voluntary human movements: ω is proportional to κ2/3. Squared jerk is known to be a Lagrangian leading to the latter law. However, it leads to unbounded movements and is therefore incompatible with quasi-periodic dynamics, such as the movement of the tip of a pen drawing ellipses. To solve this drawback, we give a class of higher-derivative Lagrangians that allow for both quasi-periodic and unbounded movements, and at the same time lead to the two-thirds power law. The current study extends this framework and investigates a wider class of Lagrangians admitting generalised conservation laws.